WO2014119452A1 - 蒸着ユニットおよび蒸着装置 - Google Patents
蒸着ユニットおよび蒸着装置 Download PDFInfo
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- WO2014119452A1 WO2014119452A1 PCT/JP2014/051269 JP2014051269W WO2014119452A1 WO 2014119452 A1 WO2014119452 A1 WO 2014119452A1 JP 2014051269 W JP2014051269 W JP 2014051269W WO 2014119452 A1 WO2014119452 A1 WO 2014119452A1
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- vapor deposition
- limiting plate
- unit
- restriction
- mask
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/042—Coating on selected surface areas, e.g. using masks using masks
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/50—Substrate holders
Definitions
- the present invention relates to a vapor deposition unit and a vapor deposition apparatus for forming a vapor deposition film having a predetermined pattern on a deposition target substrate.
- flat panel displays have been used in various products and fields, and further flat panel displays are required to have larger sizes, higher image quality, and lower power consumption.
- an organic EL display device including an organic EL element using electroluminescence (electroluminescence; hereinafter referred to as “EL”) of an organic material is an all-solid-state type, driven at a low voltage, and has a high speed response.
- EL electroluminescence
- the organic EL display device has a configuration in which a thin-film organic EL element electrically connected to a TFT is provided on a substrate made of a glass substrate provided with a TFT (thin film transistor).
- TFT thin film transistor
- organic EL elements of red (R), green (G), and blue (B) are arrayed on a substrate as sub-pixels, and TFTs are used. These organic EL elements are selectively made to emit light with a desired luminance to display an image.
- a vacuum deposition method for example, an ink jet method, a laser transfer method and the like are known.
- a vacuum deposition method is mainly used for patterning a light emitting layer.
- a deposition mask also referred to as a shadow mask in which openings of a predetermined pattern are formed is used. Then, vapor deposition particles (vapor deposition material, film forming material) from the vapor deposition source are vapor-deposited on the surface to be vapor-deposited through the opening of the vapor deposition mask, thereby forming a thin film having a predetermined pattern. At this time, vapor deposition is performed for each color of the light emitting layer (this is referred to as “separate vapor deposition”).
- the film formation substrate and the vapor deposition mask are fixed or sequentially moved to bring them into close contact with each other, and the film formation substrate and the vapor deposition mask are separated from each other and scanned while being scanned. It is broadly divided into scan vapor deposition.
- a vapor deposition mask having the same size as the deposition target substrate is used.
- the vapor deposition mask is also increased in size as the substrate is increased in size. Therefore, as the deposition target substrate becomes larger, a gap is likely to be generated between the deposition target substrate and the deposition mask due to the self-weight deflection and elongation of the deposition mask. For this reason, it is difficult to perform high-precision patterning on a large substrate, and it is difficult to achieve high definition due to the occurrence of misalignment of the deposition position and color mixing.
- the former method for example, it is not possible to perform separate deposition at a mass production level on a large substrate exceeding 60 inch size.
- a belt-shaped vapor deposition mask is used, and the vapor deposition mask and the vapor deposition source are integrated to move at least one of the deposition target substrate, the vapor deposition mask, and the vapor deposition source relative to each other. Then, vapor deposition particles are deposited on the entire surface of the film formation substrate.
- vapor deposition is performed by evaporating or sublimating a vapor deposition material and ejecting (spraying) it as vapor deposition particles from a vapor deposition source. For this reason, if the vapor deposition particles cannot be properly guided to the vapor deposition region to be vapor deposited, the vapor deposition material adheres to a portion outside the vapor deposition region, resulting in vapor deposition blur (pattern blur).
- scanning is performed while maintaining a gap between the deposition substrate and the vapor deposition mask, so that a part of the vapor deposition particles that pass obliquely through the vapor deposition mask opening is part of the vapor deposition region (opposite the vapor deposition mask opening).
- the vapor deposition blur tends to occur in a direction perpendicular to the scanning direction.
- the light emitting layer functions as a light emitting area of the pixel. For this reason, when the vapor deposition blur reaches the light emitting areas of different colors of the adjacent pixels, color mixture and device characteristics are deteriorated. Therefore, it is desirable to reduce vapor deposition blur as much as possible.
- FIG. 14 is a perspective view showing a schematic configuration of the vapor deposition apparatus described in Patent Document 1.
- FIG. 14 is a perspective view showing a schematic configuration of the vapor deposition apparatus described in Patent Document 1.
- Patent Document 1 discloses a barrier wall assembly provided with a plurality of barrier walls 311 on one side of a vapor deposition source 301 as a limiting plate that partitions a space between the vapor deposition source 301 and the vapor deposition mask 302 into a plurality of vapor deposition spaces.
- Providing 310 is disclosed. According to Patent Document 1, since the deposition range is limited by the blocking wall 311, high-definition pattern deposition can be performed without spreading the deposition pattern.
- FIG. 15A and 15B show the deposition rate when a plurality of general limiting plates 320 are provided between the deposition source 301 and the deposition mask 302 along the direction perpendicular to the scanning direction. It is a figure which shows typically the difference in the vapor deposition flow by a difference.
- FIG. 15A shows a case where the deposition rate is relatively low (at a low rate)
- FIG. 15B shows a case where the deposition rate is relatively high (at a high rate).
- FIG. 16 is a principal part top view which shows typically the vapor deposition particle 401 which passed the restriction
- the vapor deposition particles 401 (vapor deposition flow) ejected and scattered from the vapor deposition source 301 show an isotropic distribution.
- the direction is perpendicular to the scanning direction (X-axis direction).
- the vapor deposition particles 401 that have passed through the vapor deposition mask 302 at a shallow angle cause the vapor deposition blur of the vapor deposition film 402 formed on the deposition target substrate 200.
- the limiting plate 320 has a function of cutting the shallow vapor deposition particles 401 and restricting the vapor deposition flow by taking out only the deep vapor deposition particles 401 to improve the directivity.
- the kinetic energy of the vapor deposition particles 401 is high at a high rate, so that the collision / scattering probability between the vapor deposition particles 401 is increased.
- the vapor deposition flow restricted (controlled) by the restriction plate 320 has an isotropic distribution again after passing through the restriction plate opening 321, and vapor deposition blur occurs.
- the conventional restriction plate 320 cannot control the vapor deposition flow having high kinetic energy as at a high rate. This causes the vapor deposition blur.
- the vapor deposition particles 401 that have passed through the blocking wall assembly 310 at a shallow angle with respect to the X axis by colliding and scattering at a high rate pass through the vapor deposition mask 302 with a shallow angle with respect to the X axis. For this reason, the vapor deposition apparatus described in Patent Document 1 cannot suppress vapor deposition blur that occurs at a high rate.
- the aperture ratio of the limiting plate 320 is drastically decreased, so that the utilization efficiency of the vapor deposition material is decreased.
- the Z-axis direction of the limiting plate 320 (deposition substrate) 200 normal direction) becomes longer.
- the vapor deposition particles 401 are collided and scattered a plurality of times, so that the vapor deposition components that would otherwise not cause vapor deposition blur are cut. As a result, the material utilization efficiency is remarkably lowered, the yield is lowered, and the productivity is remarkably deteriorated. In addition, since the weight of the limiting plate 320 and the amount of thermal expansion are increased, the width of the vapor deposition blur varies.
- the present invention has been made in view of the above problems, and its purpose is to efficiently reduce only the vapor deposition flow that causes vapor deposition blur, thereby reducing vapor deposition blur without reducing material utilization efficiency.
- An object of the present invention is to provide a vapor deposition unit and a vapor deposition apparatus.
- a vapor deposition unit is provided between a vapor deposition mask, a vapor deposition source that ejects vapor deposition particles toward the vapor deposition mask, and the vapor deposition mask and the vapor deposition source.
- a plurality of restriction plate units having at least a first restriction plate unit and a second restriction plate unit for restricting a passing angle of the vapor deposition particles, wherein the first restriction plate unit is formed of the vapor deposition mask.
- a first restricting plate array comprising a plurality of first restricting plates provided in parallel to each other and spaced apart from each other in a first direction when viewed from a direction perpendicular to the main surface;
- the second limiting plate unit is provided between the first limiting plate unit and the vapor deposition mask, and includes a plurality of second limiting plates, viewed from a direction perpendicular to the main surface of the vapor deposition mask.
- the second restriction plate It extends in a direction intersecting the second direction perpendicular to the first direction.
- a vapor deposition apparatus includes: the vapor deposition unit; a vapor deposition mask in the vapor deposition unit; and a deposition target substrate, wherein the vapor deposition unit and the deposition target substrate are arranged in a facing manner.
- a moving device that relatively moves the second direction to be a scanning direction, and the width of the vapor deposition mask in the second direction is smaller than the width of the deposition target substrate in the second direction.
- the vapor deposition particles emitted from the vapor deposition source are vapor-deposited on the deposition target substrate through the plurality of limiting plate units and the openings of the vapor deposition mask while scanning along the second direction.
- a vapor deposition flow having an isotropic distribution due to vapor deposition particles ejected from a vapor deposition source is first cut (captured) by a first restricting plate with a vapor deposition component having poor directivity. It is controlled to have a high distribution.
- the deposition rate is high (that is, at a high rate)
- the controlled deposition flow causes an opening region between the first limiting plates due to collision / scattering between the deposition particles caused by the high kinetic energy.
- the directivity worsens, but the vapor deposition component with poor directivity is cut again by the second limiting plate, so that the distribution with high directivity is controlled, and the state of high directivity is maintained and the vapor deposition mask Pass through. For this reason, vapor deposition blur can be suppressed and a high-definition vapor deposition film pattern with very little vapor deposition blur can be formed.
- the said vapor deposition unit can cut only the distribution of the vapor deposition flow which causes vapor deposition blur according to the distribution of vapor deposition flow by providing the multi-stage restriction
- the vapor deposition unit and the vapor deposition apparatus it is possible to suppress vapor deposition blur at a high rate, improve material utilization efficiency, and improve yield and productivity. it can.
- FIG. 1 It is a perspective view which shows schematic structure of the principal part of the vapor deposition unit in the vapor deposition apparatus concerning Embodiment 1 together with a film-forming substrate.
- It is sectional drawing which shows an example of the vapor deposition flow at the time of providing the 1st restriction
- FIG. 2 is a cross-sectional view schematically showing a schematic configuration of a main part in the vapor deposition apparatus according to Embodiment 1.
- FIG. 6 is a plan view of a principal part showing another schematic configuration of the limiting plate unit according to the first exemplary embodiment.
- FIG. 1 It is a perspective view which shows schematic structure of the principal part of the vapor deposition unit in the vapor deposition apparatus concerning Embodiment 2 together with a film-forming substrate.
- the first limiting plate and the second limiting plate when viewed from the direction perpendicular to the main surface of the vapor deposition mask, the vapor deposition particles that have passed through the first limiting plate at a high rate It is a principal part top view typically shown with this.
- (A)-(l) is a principal part top view which shows other schematic structure of the limiting plate unit concerning Embodiment 2.
- FIG. 1 is a top view which shows the other example of a pattern of the 2nd restriction
- FIGS. It is a perspective view which shows schematic structure of the principal part of the vapor deposition unit in the vapor deposition apparatus concerning Embodiment 3 together with a film-forming substrate.
- FIG. 9 is a plan view of a principal part showing a schematic configuration of a limiting plate unit according to a third embodiment. It is a perspective view which shows schematic structure of the vapor deposition apparatus of patent document 1.
- (A) and (b) are differences in the vapor deposition flow due to the difference in vapor deposition rate when a plurality of general limiting plates are provided between the vapor deposition source and the vapor deposition mask along the direction perpendicular to the scanning direction.
- (A) shows a low rate
- (b) shows a high rate. It is a principal part top view which shows typically the vapor deposition particle which passed the restriction
- FIG. 1 is a perspective view showing a schematic configuration of a main part of a vapor deposition unit 1 in a vapor deposition apparatus 100 (see FIG. 6) according to the present embodiment, together with a film formation substrate 200.
- the horizontal axis along the scanning direction of the film formation substrate 200 is defined as the Y axis
- the horizontal axis along the direction perpendicular to the scanning direction of the film formation substrate 200 is defined as the X axis.
- a vertical direction axis perpendicular to the X axis and the Y axis which is a normal direction of the deposition surface 201 (deposition surface) of the deposition substrate 200 and is a direction in which a deposition axis perpendicular to the deposition surface 201 extends.
- the (vertical direction axis) will be described as the Z axis.
- the side of the arrow in the Z-axis direction (the upper side of the sheet of FIG. 1) will be described as “upper side”.
- the vapor deposition unit 1 concerning this Embodiment is provided between the vapor deposition source 10, the vapor deposition mask 40, and the vapor deposition source 10 and the vapor deposition mask 40, and restrict
- the first limiting plate unit 20 and the second limiting plate unit 30 are provided.
- the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 have, for example, a certain gap from each other in this order along the Z-axis direction from the vapor deposition source 10 side (that is, , Spaced apart by a certain distance).
- the vapor deposition apparatus 100 is a vapor deposition apparatus using a scan vapor deposition method. For this reason, in the vapor deposition apparatus 100, at least one of the deposition target substrate 200 and the deposition unit 1 is relatively moved (scanned) in a state where a certain gap is provided between the deposition mask 40 and the deposition target substrate 200.
- the relative positions of the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 are fixed to each other. Therefore, the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 are formed by a holding member (not shown) such as the same holder, for example, a holder 50 shown in FIG. It may be hold
- a holding member such as the same holder, for example, a holder 50 shown in FIG. It may be hold
- the vapor deposition source 10 is, for example, a container that stores a vapor deposition material therein.
- the vapor deposition source 10 may be a container that directly stores the vapor deposition material inside the container, may have a load-lock type pipe, and may be formed so that the vapor deposition material is supplied from the outside.
- the deposition source 10 is formed in a rectangular shape, for example, as shown in FIG.
- the vapor deposition source 10 has a plurality of ejection ports 11 (through ports, nozzles) for ejecting the vapor deposition particles 401 on its upper surface (that is, the surface facing the first limiting plate unit 20). These injection ports 11 are arranged at a constant pitch in the X-axis direction (first direction, direction perpendicular to the scanning direction).
- the vapor deposition source 10 generates gaseous vapor deposition particles 401 by heating and vaporizing the vapor deposition material (when the vapor deposition material is a liquid material) or sublimating (when the vapor deposition material is a solid material).
- the vapor deposition source 10 injects the vapor deposition material made in this way as vapor deposition particles 401 from the injection port 11 toward the first limiting plate unit 20.
- the number of the injection ports 11 is not specifically limited, At least 1 formation is carried out. It only has to be done.
- the injection ports 11 may be arranged in a one-dimensional shape (that is, a line shape) in the X-axis direction as shown in FIG. 1, or arranged in a two-dimensional shape (that is, a planar shape (tile shape)). It does not matter.
- the vapor deposition mask 40 is a plate-like object whose mask surface, which is the main surface (surface having the largest area), is parallel to the XY plane.
- a vapor deposition mask having a size at least in the Y-axis direction smaller than that of the deposition target substrate 200 is used as the vapor deposition mask 40.
- the main surface of the vapor deposition mask 40 is provided with a plurality of mask openings 41 (openings, through holes) for allowing vapor deposition particles 401 to pass through during vapor deposition.
- the mask opening 41 is provided corresponding to a partial pattern of the vapor deposition region so that the vapor deposition particles 401 do not adhere to a region other than the target vapor deposition region on the deposition target substrate 200. Only the vapor deposition particles 401 that have passed through the mask opening 41 reach the film formation substrate 200, and a vapor deposition film 402 (see FIG. 6) having a pattern corresponding to the mask opening 41 is formed on the film formation substrate 200.
- the said vapor deposition material is a material of the light emitting layer in an organic electroluminescence display
- vapor deposition of the light emitting layer in an organic EL vapor deposition process is performed for every color of a light emitting layer.
- first limiting plate unit 20 and the second limiting plate unit 30 are arranged in this order from the vapor deposition source 10 side along the Z-axis direction between the vapor deposition source 10 and the vapor deposition mask 40. ing.
- the first limiting plate unit 20 includes a first limiting plate row 21 including a plurality of first limiting plates 22.
- the second limiting plate unit 30 includes a second limiting plate row 31 including a plurality of second limiting plates 32.
- the vapor deposition particles 401 ejected from the vapor deposition source 10 pass between the first restriction plates 22, then pass between the second restriction plates 32, pass through the mask opening 41 formed in the vapor deposition mask 40, and are covered. Vapor deposition is performed on the deposition substrate 200.
- the first limiting plate unit 20 and the second limiting plate unit 30 selectively cause the vapor deposition particles 401 incident on the first limiting plate unit 20 and the second limiting plate unit 30 according to the incident angle. To capture.
- the first limiting plate unit 20 captures at least a part of the vapor deposition particles 401 that collide with the first limiting plate 22, thereby preventing the vapor deposition particles 401 ejected from the vapor deposition source 10.
- the movement of the vapor deposition particles 401 in the arrangement direction of the plate 22 is limited.
- the second restriction plate unit 30 captures at least a part of the vapor deposition particles 401 colliding with the second restriction plate 32, for example, for the vapor deposition particles 401 that have passed through the first restriction plate 22, The movement of the vapor deposition particles 401 in the arrangement direction of the second restriction plate 32 (that is, the Y-axis direction and the oblique direction) is restricted.
- the first limiting plate unit 20 and the second limiting plate unit 30 limit the incident angle of the vapor deposition particles 401 incident on the mask opening 41 of the vapor deposition mask 40 within a certain range, and The adhesion of the vapor deposition particles 401 from an oblique direction is prevented.
- the first limiting plates 22 are each formed of a plate-like member having the same dimensions.
- the second restriction plates 32 are also formed by plate members having the same dimensions. However, the first limiting plate 22 and the second limiting plate 32 do not need to have the same dimensions.
- the first limiting plate 22 and the second limiting plate 32 are installed so as not to be parallel on the same YZ plane, and extend in different directions when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40. It is installed.
- the first limiting plate 22 When viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, the first limiting plate 22 extends in parallel to the Y axis, and a plurality of first limiting plates 22 are arranged in parallel to each other in the X axis direction at the same pitch. ing. Thereby, when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40 (that is, a direction parallel to the Z-axis), the first limiting plate 22 adjacent in the X-axis direction is limited as an open region. One plate opening 23 is formed.
- the first limiting plate 22 is arranged so that the injection port 11 of the vapor deposition source 10 corresponds to each limiting plate opening 23.
- the X-axis direction position of the injection port 11 is located at the center position in the X-axis direction of the adjacent first limiting plate 22.
- the pitch of the restriction plate openings 23 is formed larger than the pitch of the mask openings 41, and the first restriction plate 22 adjacent in the X-axis direction when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40.
- a plurality of mask openings 41 are arranged therebetween.
- the second limiting plate 32 when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40, the second limiting plate 32 extends in parallel to the X axis, and is parallel to each other at the same pitch in the Y axis direction (the first axis). 2 in the scanning direction).
- one limiting plate opening 33 is formed as an opening region between the second limiting plates 32 adjacent to each other in the Y-axis direction. .
- the first limiting plate 22 has a YZ plane as a main surface.
- the XZ plane is the main surface of the second limiting plate 32.
- the first limiting plate 22 and the second limiting plate 32 are arranged so as to be perpendicular to the main surface of the vapor deposition mask 40, respectively. That is, the first limiting plate 22 and the second limiting plate 32 are arranged such that the front and back surfaces, which are the main surfaces, face the direction perpendicular to the deposition surface 201 of the deposition target substrate 200. .
- the first limiting plates 22 are arranged so that their main surfaces are adjacent to each other in the X-axis direction, and the second limiting plates 32 are so that their main surfaces are adjacent to each other in the Y-axis direction. It is arranged.
- the first limiting plate 22 and the second limiting plate 32 are each formed in a rectangular shape, for example.
- the first limiting plate 22 and the second limiting plate 32 are arranged vertically so that the minor axis thereof is parallel to the Z-axis direction.
- the long axis of the first limiting plate 22 is arranged parallel to the Y-axis direction
- the long axis of the second limiting plate 32 is arranged parallel to the X-axis direction.
- FIG. 2 shows the first limiting plate 22 and the second limiting plate 32 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, and the vapor deposition particles 401 that have passed through the first limiting plate 22 at a high rate. It is a principal part top view typically shown collectively.
- the first limiting plate 22 and the second limiting plate are arranged so that the axial directions of the first limiting plate 22 and the second limiting plate 32 are vertical.
- the second limiting plate 32 is non-parallel to the Y-axis direction and intersects the Y-axis direction when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40. It extends in the direction. More precisely, the end surface 32a of the second limiting plate 32 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40 is in the direction perpendicular to the main surface of the vapor deposition mask 40 in the first limiting plate row 21.
- the end plate 22a of the first limiting plate 22 and the limiting plate opening 33 between the first limiting plate 22 intersect.
- the end surface 22a of the first limiting plate 22 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40 is the vapor deposition mask 40 among the surfaces other than the main surface of the first limiting plate 22.
- the surface (for example, the upper surface or lower surface of the 1st restriction board 22 in FIG. 1) when it sees from the direction perpendicular
- the end surface 32 a of the second limiting plate 32 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40 is the main surface of the vapor deposition mask 40 among the surfaces other than the main surface of the second limiting plate 32.
- a surface (for example, the upper surface or the lower surface of the second limiting plate 32 in FIG. 1) when viewed from a direction perpendicular to the surface is shown.
- the controlled deposition flow is directed after passing through the restriction plate opening 23 between the first restriction plates 22 due to collision / scattering between the vapor deposition particles 401 caused by the high kinetic energy. Sexuality gets worse.
- the vapor deposition component having poor directivity is again cut by the second restricting plate 32, and the vapor deposition flow having poor directivity is controlled to have a high directivity distribution.
- the vapor deposition flow that maintains a high directivity state passes through the mask opening 41 of the vapor deposition mask 40 and is vapor deposited on the deposition target substrate 200.
- the separate layer of the vapor deposition film 402 can be formed by scanning the deposition target substrate 200 in the Y-axis direction.
- the end surface 32 a of the second limiting plate 32 is limited between the end surface 22 a of the first limiting plate 22 and the first limiting plate 22 in the first limiting plate row 21.
- the axial direction of the first limiting plate 22 and the axial direction of the second limiting plate 32 are perpendicular to each other so as to intersect at least one of the plate openings 33.
- the vapor deposition particles 401 that have passed through the second limiting plate unit 30 pass through the mask opening 41 of the vapor deposition mask 40 while maintaining high directivity, and are vapor deposited on the deposition target substrate 200. For this reason, vapor deposition blur can be suppressed and a high-definition vapor deposition film pattern with very little vapor deposition blur can be formed.
- the film formation substrate 200 is an organic EL substrate
- evaporation blur is greatly suppressed.
- the X-axis direction of the first limiting plate 22 is used to reduce the width of the vapor deposition blur. It is necessary to reduce the interval of the first limit plate 22 or to increase the length of the first limiting plate 22.
- the aperture ratio of the plurality of first restriction plates 22 is drastically lowered, so that the utilization efficiency of the vapor deposition material is lowered.
- the length of the first limiting plate 22 in the Z-axis direction is increased in order to reduce the distance between the first limiting plate 22 and the vapor deposition mask 40, the weight and thermal expansion amount of the first limiting plate 22 are increased. Therefore, the width of the vapor deposition blur varies.
- the vapor deposition unit 1 includes a plurality of limiting plate units in the Z-axis direction. Can be cut efficiently. For this reason, it is possible to reduce the material lost by the limiting plate as in the case where the length of the limiting plate in the Z-axis direction (the normal direction of the deposition target substrate 200) is increased.
- FIG. 3 is a cross-sectional view showing an example of the vapor deposition flow when the first limiting plate 22 is provided in two stages in the Z-axis direction via the gap 28.
- the lower first restriction plate 22 is referred to as a first restriction plate 22A
- the restriction plate opening 23 between the first restriction plates 22A is referred to as a restriction plate opening 23A.
- the upper first limiting plate 22 is referred to as a first limiting plate 22B
- the limiting plate opening 23 between the first limiting plates 22B is referred to as a limiting plate opening 23A.
- the vapor deposition particles 401 obliquely emitted from the limiting plate opening 23A between the first limiting plates 22A on the lower side (that is, the upstream side). However, it may pass through the gap 28 and pass through the limiting plate opening 23B other than the limiting plate opening 23B positioned directly above the limiting plate opening 23A and may enter the mask opening 41.
- the directivity of the vapor deposition component having high directivity and the directivity that changes to the high directivity component by repeating scattering collisions between particles are obtained.
- the ratio of cutting even bad vapor deposition components increases. For this reason, there exists a concern that a vapor deposition rate may become low or material utilization efficiency may fall.
- the first limiting plate 22 that is, on the downstream side
- the first limiting plate 22 or the limiting plate opening 23 is seen from the direction perpendicular to the main surface of the vapor deposition mask 40.
- the second limiting plate 32 arranged non-parallel to the Y-axis direction so as to intersect, the vapor deposition particles 401 having poor directivity can be effectively cut.
- the vapor deposition unit 1 moves the second limiting plate unit having a different axial direction from the first limiting plate unit 20 in the downstream direction of the first limiting plate unit 20.
- the spread of the vapor deposition flow can be narrowed in three dimensions. For this reason, it is possible to control the vapor deposition flow having high kinetic energy as at a high rate.
- the vapor deposition unit 1 includes a plurality of limiting plate units in the Z-axis direction, and each limiting plate unit includes a plurality of limiting plates.
- each limiting plate unit includes a plurality of limiting plates.
- the first limiting plate 22 and the second limiting plate 32 are not heated or cooled by a heat exchanger (not shown) in order to cut the oblique deposition components. For this reason, the first limiting plate 22 and the second limiting plate 32 are at a temperature lower than the injection port 11 of the vapor deposition source 10 (more strictly, a temperature lower than the vapor generation particle generation temperature at which the vapor deposition material becomes a gas). It has become.
- the first limiting plate unit 20 and the second limiting plate unit 30 are provided with a cooling mechanism (not shown) that cools the first limiting plate 22 and the second limiting plate 32 as necessary. It may be.
- the unnecessary vapor deposition particles 401 that are not completely parallel to the normal direction of the deposition target substrate 200 are cooled and solidified by the first limiting plate 22 and the second limiting plate 32.
- the unnecessary vapor deposition particles 401 can be easily captured by the first limiting plate 22 and the second limiting plate 32, and the traveling direction of the vapor deposition particles 401 is set to the normal direction of the deposition target substrate 200. You can get closer.
- FIG. 4 is a perspective view illustrating an example of a schematic configuration of the first limiting plate unit 20 and the second limiting plate unit 30.
- Each of the first limiting plates 22 is a frame-shaped holding body 26 including a pair of first holding members 24 parallel to the X-axis direction and a pair of second holding members 25 parallel to the Y-axis direction. Further, they are integrally held by a method such as welding.
- each of the second limiting plates 32 is a frame-shaped holding body including a pair of first holding members 34 parallel to the X-axis direction and a pair of second holding members 35 parallel to the Y-axis direction. 36 is integrally held by a method such as welding.
- the method of holding the first limiting plate 22 and the second limiting plate 32 is as follows. The method is not limited to the above.
- FIG. 5 is a perspective view showing another example of the schematic configuration of the second limiting plate unit 30.
- FIG. 5 is a perspective view showing another example of the schematic configuration of the second limiting plate unit 30.
- the second limiting plate unit 30 includes a plurality of second limiting plates 32 that are provided apart from each other, and the limiting plate openings 33 are respectively provided between the adjacent second limiting plates 32. It may be a block-shaped unit provided with.
- the cooling mechanism can be easily assembled and positioned in the second limiting plate unit 30, and the replacement work can be facilitated. There are advantages such as.
- the second restriction plate unit 30 has a block shape
- the first restriction plate unit 20 has a block shape. Needless to say, it may be formed.
- FIG. 1 a case where the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 are provided apart from each other in the Z-axis direction is exemplified. Illustrated.
- the vapor deposition source 10 As described above, the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 are provided apart from each other by a certain distance in the Z-axis direction. An effect is obtained that a space between adjacent restriction plate units can be easily maintained at a predetermined degree of vacuum.
- the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 are adjacent to each other in the Z-axis direction. May be provided.
- the effect when the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 are separated from or brought into contact with each other has advantages and disadvantages. Therefore, the arrangement may be appropriately selected and set so as to obtain a desired effect.
- the first limiting plate unit 20 and the second limiting plate unit 30 are provided between the vapor deposition source 10 and the vapor deposition mask 40 as described above. The effect of can be obtained.
- first limiting plate 22 and the second limiting plate 32 can be aligned extremely accurately by pin alignment or the like.
- the second restriction plate 32 can be replaced with the first restriction plate 22 without providing a separate cooling mechanism for the second restriction plate 32.
- cooling can be performed using the provided cooling mechanism. For this reason, the reevaporation of the trapped vapor deposition particles 401 can be prevented with a simple configuration.
- the low-directivity vapor deposition particles 401 are captured immediately after passing through the first limiting plate 22.
- the low directivity vapor deposition particles 401 there are some particles that are repeatedly scattered before reaching the film formation substrate 200 to increase the directivity. For this reason, in this case, it becomes impossible to use the vapor deposition particles 401 that repeat scattering and increase the directivity until reaching the deposition target substrate 200 in this way.
- the gap between the second limiting plate 32 and the second limiting plate 32 is sewn to reach the film formation substrate 200 and cause vapor deposition blur.
- the second limiting plate 32 and the vapor deposition mask 40 can be aligned extremely accurately by pin alignment or the like. For this reason, compared with the case where the upper end part of the 2nd restriction
- the vapor deposition mask 40 is generally thin, there is a concern that the vapor deposition mask 40 may be damaged when the upper end portion of the second limiting plate 32 and the vapor deposition mask 40 are brought into close contact with each other.
- the thermal history of the second limiting plate 32 is transmitted to the vapor deposition mask 40, the accuracy of the vapor deposition mask 40 may be reduced depending on the temperature history of the second limiting plate 32.
- the longer the length of the second limiting plate 32 in the Z-axis direction the lower the directivity of the vapor deposition particles 401 can be captured, and the effect of preventing the vapor deposition blur. Will increase.
- the ratio of the second limiting plate 32 to the vapor deposition chamber such as a vacuum chamber increases. For this reason, when the amount of the vapor deposition particles 401 adhering to the second limiting plate 32 increases, there is a concern about contamination and re-evaporation, and there is a possibility that the light emission characteristics may be deteriorated.
- the second limiting plate 32 and at least one of the first limiting plate 22 and the vapor deposition mask 40 are brought into close contact with each other, a single space is formed. Therefore, depending on the length of the second limiting plate 32. However, it is difficult to increase the degree of vacuum in the space, and there is a risk that interparticle scattering is likely to be enhanced. This tendency becomes more prominent as the second limiting plate 32 is longer in the Z-axis direction. In particular, when the second limiting plate 32 is in close contact with both the first limiting plate 22 and the vapor deposition mask 40, the above problem is likely to occur. For this reason, when the second restriction plate 32 that is long in the Z-axis direction is used, the second restriction plate 32, the first restriction plate 22, and the vapor deposition mask 40 may be provided apart from each other to some extent. desirable.
- FIG. 6 is a cross-sectional view schematically showing a schematic configuration of a main part in the vapor deposition apparatus 100 according to the present embodiment.
- FIG. 6 has shown the cross section parallel to the X-axis direction in the vapor deposition apparatus 100 concerning this Embodiment.
- the vapor deposition apparatus 100 includes a vacuum chamber 101 (film formation chamber), a substrate holder 102 (substrate holding member), a substrate moving device 103, a vapor deposition unit 1, and a vapor deposition unit moving device 104.
- An alignment observation means such as an image sensor 105, a shutter (not shown), a control circuit (not shown) for driving and controlling the vapor deposition apparatus 100, and the like.
- the substrate holder 102, the substrate moving device 103, the vapor deposition unit 1, and the vapor deposition unit moving device 104 are provided in the vacuum chamber 101.
- the vacuum chamber 101 includes a vacuum pump (not shown) that evacuates the vacuum chamber 101 via an exhaust port (not shown) provided in the vacuum chamber 101 in order to keep the vacuum chamber 101 in a vacuum state during vapor deposition. Is provided.
- the substrate holder 102 is a substrate holding member that holds the deposition target substrate 200.
- the substrate holder 102 holds the deposition target substrate 200 made of a TFT substrate or the like so that the deposition surface 201 faces the deposition mask 40 in the deposition unit 1.
- the deposition target substrate 200 and the vapor deposition mask 40 are disposed to face each other with a certain distance therebetween, and a gap with a certain height is provided between the deposition target substrate 200 and the vapor deposition mask 40.
- an electrostatic chuck is preferably used for the substrate holder 102. Since the deposition target substrate 200 is fixed to the substrate holder 102 by a technique such as electrostatic chucking, the deposition target substrate 200 is held on the substrate holder 102 without being bent by its own weight.
- Substrate moving device 103 and vapor deposition unit moving device 104 At least one of the substrate moving device 103 and the vapor deposition unit moving device 104 relatively moves the film formation substrate 200 and the vapor deposition unit 1 so that the Y-axis direction is the scanning direction. Perform scan deposition.
- the substrate moving device 103 includes a motor (not shown), for example, and moves the deposition target substrate 200 held by the substrate holder 102 by driving the motor by a motor drive control unit (not shown).
- the vapor deposition unit moving device 104 includes, for example, a motor (not shown), and drives the motor by a motor drive control unit (not shown), thereby moving the vapor deposition unit 1 relative to the deposition target substrate 200.
- the substrate moving device 103 and the vapor deposition unit moving device 104 drive an unillustrated motor to the alignment marker 42 provided in the non-opening region of the vapor deposition mask 40 and the non-vapor deposition region in the deposition target substrate 200.
- Position correction is performed by the provided alignment marker 202 so that the positional deviation between the vapor deposition mask 40 and the deposition target substrate 200 is eliminated.
- the substrate moving device 103 and the vapor deposition unit moving device 104 may be, for example, a roller type moving device or a hydraulic type moving device.
- the substrate moving device 103 and the vapor deposition unit moving device 104 are, for example, a drive unit composed of a motor (XY ⁇ drive motor) such as a stepping motor (pulse motor), a roller, and a gear, and a drive such as a motor drive control unit.
- the film formation substrate 200 or the vapor deposition unit 1 may be moved by providing a control unit and driving the drive unit by the drive control unit.
- the substrate moving device 103 and the vapor deposition unit moving device 104 include a driving unit composed of an XYZ stage or the like, and may be movably provided in any of the X axis direction, the Y axis direction, and the Z axis direction. Good.
- At least one of the deposition target substrate 200 and the vapor deposition unit 1 may be provided so as to be relatively movable.
- at least one of the substrate moving device 103 and the vapor deposition unit moving device 104 may be provided.
- the vapor deposition unit 1 may be fixed to the inner wall of the vacuum chamber 101.
- the substrate holder 102 may be fixed to the inner wall of the vacuum chamber 101.
- the vapor deposition unit 1 includes a vapor deposition source 10, a first limiting plate unit 20, a second limiting plate unit 30, a vapor deposition mask 40, a holder 50, a deposition preventing plate 60, a shutter (not shown), and the like. Since the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40 have already been described, the description thereof is omitted here.
- the holder 50 is a holding member that holds the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, and the vapor deposition mask 40.
- the holder 50 is provided with, for example, a pair of slide devices 51 and a support member 52 in order to support the first limiting plate unit 20 and the second limiting plate unit 30, for example.
- the slide device 51 is disposed so as to face both ends of the holder 50 in the X-axis direction. Further, the support member 52 is provided on the facing surface side of each slide device 51. These support members 52 are slidable in the Z-axis direction and the X-axis direction in a state of being opposed to each other, and their movements are controlled in cooperation with the slide device 51 and a limiting plate control device (not shown).
- first limiting plate unit 20 includes, for example, a frame-shaped holding body 26 as described above.
- the second restriction plate unit 30 includes, for example, a frame-shaped holding body 36 as described above.
- Support portions 27 detachably attached to the support member 52 are provided at both ends in the X-axis direction of the frame-shaped holding body 26. Further, support portions 37 detachably provided on the support member 52 are provided at both ends in the X-axis direction of the frame-shaped holding body 36. Thereby, the first limiting plate unit 20 and the second limiting plate unit 30 can be attached and detached from the holder 50, and the vapor deposition material deposited on the first limiting plate unit 20 and the second limiting plate unit 30 is used. It can be collected regularly.
- the vapor deposition material melts or evaporates when heated, and thus can be easily recovered by heat treatment. Since the vapor deposition mask 40 has high required dimensional accuracy such as the opening width and flatness thereof, there is a risk of causing distortion, and heat treatment cannot be performed. However, since the first limiting plate unit 20 and the second limiting plate unit 30 do not require a high degree of dimensional accuracy as the vapor deposition mask 40, heat treatment can be performed, and the deposited vapor deposition material can be easily recovered. can do. Accordingly, high material utilization efficiency can be ensured.
- the vapor deposition unit 1 is provided with a tension mechanism 53 for applying tension to the vapor deposition mask 40 on the holder 50, for example.
- the vapor deposition mask 40 can be held horizontally while tension is applied to the vapor deposition mask 40, and the vapor deposition mask 40, the vapor deposition source 10, the first limiting plate unit 20, and the second limiting plate unit 30.
- the relative positional relationship with can be fixed.
- the vapor deposition particles 401 scattered from the vapor deposition source 10 are adjusted so as to be scattered in the vapor deposition mask 40, and the vapor deposition particles scattered outside the vapor deposition mask 40 are attached to the deposition preventing plate 60 (shielding plate). It is good also as a structure removed suitably by these.
- a shutter (not shown) is provided between the vapor deposition source 10 and the first limiting plate unit 20 to control the arrival of the vapor deposition particles 401 to the vapor deposition mask 40 as necessary. It may be provided so as to be able to advance / retreat (can be inserted / removed) based on an OFF signal or a deposition ON signal.
- the shutter By appropriately inserting a shutter between the vapor deposition source 10 and the first limiting plate unit 20, vapor deposition in a non-vapor deposition region where vapor deposition is not performed can be prevented.
- the shutter may be provided integrally with the vapor deposition source 10, or may be provided separately from the vapor deposition source 10.
- FIG. 7 is a main part plan view showing another schematic configuration of the limiting plate unit according to the present embodiment.
- the first limiting plate 22 and the first limiting plate 22 are viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- the two limiting plates 32 are schematically shown together with the vapor deposition particles 401 that have passed through the first limiting plate 22 at a high rate.
- Vapor deposition blur can be suppressed by being deposited on the deposition target substrate 200.
- the second limiting plate 32 is continuous in the X-axis direction.
- the second limiting plate 32 is formed intermittently in the X-axis direction. May be. That is, it may be discontinuous. In this case, it is not necessary to match the discontinuous portion at a specific position on the X axis, and it is not necessary to match the length of the discontinuous portion. What is necessary is just to determine the position of a discontinuous location suitably according to arrangement
- the second limiting plate 32 When the second limiting plate 32 is provided continuously in the X-axis direction, there is an advantage that the second limiting plate 32 can be easily arranged.
- the second restriction plate 32 is intermittently formed in the X-axis direction, so that the second restriction plate 32 can be configured by a combination of small parts, There is an advantage that fine adjustment according to the nozzle distribution / vapor deposition distribution becomes possible.
- the vapor deposition source 10 is arranged below the deposition target substrate 200, and the deposition target substrate 200 receives the vapor deposition particles 401 from the deposition source 10 in a state where the deposition target surface 201 faces downward.
- An example in which the film is injected upward and is deposited (up-deposition) on the deposition target substrate 200 is shown as an example.
- the vapor deposition method is not limited to this, and the vapor deposition source 10 is provided above the deposition target substrate 200, and the vapor deposition particles 401 are injected downward from the vapor deposition source 10 to form the deposition target substrate 200. It may be vapor-deposited (down-deposition).
- the arrangement of the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, the vapor deposition mask 40, and the deposition target substrate 200 is opposite to the example shown in FIGS. 1 and 6. Obviously, in this case, the arrangement of the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, the vapor deposition mask 40, and the deposition target substrate 200 is opposite to the example shown in FIGS. 1 and 6. Become.
- the vapor deposition source 10 has, for example, a mechanism for injecting vapor deposition particles 401 in the lateral direction, and the deposition target surface 201 side of the deposition target substrate 200 is set up in the vertical direction facing the deposition source 10 side. In this state, the vapor deposition particles 401 may be ejected in the lateral direction and vapor deposited (side deposition) on the deposition target substrate 200.
- the arrangement of the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, the vapor deposition mask 40, and the deposition target substrate 200 may be any of the left and right examples shown in FIGS. 1 and 6. The arrangement is rotated 90 degrees in the direction of.
- first limiting plate 22 and the second limiting plate 32 are provided perpendicular to the main surface of the vapor deposition mask 40 .
- first limiting plate The main surfaces of 22 and the second limiting plate 32 may be provided inclined with respect to the Z-axis direction.
- the first restriction plate 22 and the second restriction plate 32 are respectively formed on the main surface of the vapor deposition mask 40. It is preferable that they are provided vertically.
- the vapor deposition blur can be sufficiently suppressed by arranging the second limiting plate unit 30 shown in the first embodiment.
- the vapor deposition particles 401 tend to fly closer to the X axis as the directivity decreases, and in the second limiting plate unit 30 shown in the first embodiment, the vapor deposition particles 401 asymptotic to the X axis. This is because cannot be cut.
- the second limiting plate 32 is provided asymptotically to the X axis. It is desirable.
- FIG. 8 is a perspective view showing a schematic configuration of a main part of the vapor deposition unit 1 in the vapor deposition apparatus 100 according to the present embodiment, together with the film formation substrate 200. Further, FIG. 9 shows the vapor deposition particles that have passed through the first limiting plate 22 and the second limiting plate 32 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, at the high rate. 4 is a plan view of an essential part schematically shown in FIG.
- the vapor deposition unit 1 according to the present embodiment has the second limiting plate 32, more strictly, the first limit plate 32 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40.
- the end surfaces 32a of the two limiting plates 32 have a bent shape and are arranged in parallel with each other in the X-axis direction at the same pitch, and between the second limiting plates 32 adjacent in the X-axis direction. Except that the limiting plate opening 33 having a bent shape is formed, the vapor deposition unit 1 according to the first embodiment has the same configuration.
- the first limiting plate 22 and the second limiting plate 32 are installed so as not to be parallel on the same YZ plane.
- the second limiting plate 32 is non-parallel to the Y-axis direction and extends in a direction intersecting the Y-axis direction.
- the vaporized vaporized flow after passing through the first limiting plate unit 20 can be cut by the second limiting plate unit 30.
- the vapor deposition particles 401 that have passed through the mask opening 41 of the vapor deposition mask 40 in a state having directivity are vapor deposited on the deposition target substrate 200, vapor deposition blur can be suppressed.
- the second limiting plate 32 since the second limiting plate 32 is bent, the second limiting plate 32 is provided continuously in the Y-axis direction asymptotically in the X-axis direction.
- ⁇ Modification> 10 (a) to 10 (l) are main part plan views showing another schematic configuration of the limiting plate unit according to the present embodiment, as viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- FIG. The first restriction plate 22 and the second restriction plate 32 are schematically shown.
- the shape> As an example of the second limiting plate 32 having a bent shape, when the second limiting plate 32 is viewed from a direction perpendicular to the main surface of the vapor deposition mask 40, the shape>
- the case of having a V-shape opening in a direction perpendicular to the scanning direction is shown as an example.
- each of the second restriction plates 32 may have a zigzag shape, and the plurality of restriction plates 32 may be arranged in a zigzag shape.
- the number of vapor deposition components vapor deposition particles 401 having poor directivity that are cut by the second limiting plate 32 increases, and hence the vapor deposition blur is further improved.
- the second restriction plate 32 is, like the second restriction plate 32 according to the first embodiment, for example, as shown in FIG. 10C, so as to straddle the plurality of first restriction plates 22. It may be provided continuously in the axial direction.
- the first restriction plate row 21 straddles the plurality of first restriction plates 22 so that the second restriction plate 32 has a bending point only at the end portion of the first restriction plate row 21. It may be formed over the entire area.
- the second limiting plate 32 is the first limiting plate 22 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40. It may be provided only directly above. At this time, for example, as shown in FIG. 10D, the second limiting plate 32 is provided from the end of the first limiting plate 22 to the end as viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, for example. May be provided, or may be provided partially. For example, the second restriction plate 32 may be provided only in a certain area of the first restriction plate 22.
- the vapor deposition density is high and the collision of the vapor deposition particles 401 is large, so the directivity tends to deteriorate.
- the distance from the injection port 11 is increased, the vapor deposition density is lowered, and the directivity is hardly deteriorated.
- the second limiting plate 32 is, for example, as shown in FIG. 10 (e), in the vicinity of the upper portion of the injection port 11 immediately above the first limiting plate 22 (for example, the deposition mask 40).
- the injection port 11 is provided in the center part of the restriction
- limiting board 32 is as shown to (e) of FIG. 10, for example in this case In addition, it may be provided only in the region of the central portion of the first limiting plate 22.
- the second restriction plate 32 may be provided only in the vicinity of the upper portion of the injection port 11 on the restriction plate opening 23 between the first restriction plates 22. Needless to say, the second restriction plate 32 may be provided only in both the portion shown in FIG. 10E and the portion shown in FIG. 10F. Yes. That is, the second restricting plate 32 may be provided only in the upper part in the vicinity of the injection port 11 as shown in FIGS. 10 (e) and 10 (f).
- the second limiting plate 32 is formed by, for example, partially disposing the second limiting plate 32 on the first limiting plate 32 as shown in FIG. 10 (e) and FIG. 10 (g). There may be a region concentrated in the region, a region where the second restriction plate 32 is not provided, or a region where the arrangement interval is large, and the arrangement interval may be sparse and dense.
- the end surface 32 a of the second limiting plate 32 is the first limiting plate row 21 in the first limiting plate row 21. It is only necessary to cross at least one of the limit plate openings 23 between the end surface 22 a of the limit plate 22 and the first limit plate 22. That is, when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, the second restriction plate 32 (the end face 32 a of the second restriction plate 32) extends from the end face 22 a of the first restriction plate 22. It is only necessary to extend in the direction intersecting the Y-axis direction which is the extending direction (opening length direction) of the restriction plate opening 23 between the first restriction plate 22 and the first restriction plate 22.
- the restriction plate opening 23 between the first restriction plates 22 is viewed from a direction perpendicular to the main surface of the vapor deposition mask 40 so as to be divided in a direction different from the X-axis direction. More preferably, the end face 32 a of the second restriction plate 32 intersects at least the restriction plate opening 23 between the first restriction plates 22.
- FIGS. 9 and 10 (a) to (f) the case where the bending line of the second limiting plate 32 is symmetric with respect to the X axis is shown as an example.
- the present invention is not limited to this.
- the length of the bending line may vary.
- the angle of the bending line may vary.
- FIG. 11A to 11C are plan views showing other pattern examples of the second restricting plate 32.
- FIG. 11A to 11C are plan views showing other pattern examples of the second restricting plate 32.
- FIG. 11A shows, as an example, a case where the bending angle is different at each bending point as another pattern of the second limiting plate 32.
- 11B and 11C show the relationship between the bending angle of the second limiting plate 32 and the directivity of the vapor deposition particles 401 in other patterns.
- Each of the second restriction plates 32 may have a shape shown in FIG. 11A, and a plurality of second restriction plates may be arranged in the shape shown in FIG. Good.
- the bending angle may be determined according to the arrangement (nozzle distribution) of the injection ports 11 in the vapor deposition source 10 and the vapor deposition distribution.
- the way of the vapor deposition particles 401 becomes closer to the X axis as the directivity decreases.
- the directivity is high, the vapor deposition particles 401 fly asymptotically to the Y axis. Therefore, in the case where the directivity is extremely lowered, in order to capture the vapor deposition particles 401 having low directivity by the second restricting plate 32, it is desirable that the bent line is asymptotic to the X axis.
- the higher the directivity the larger the angle of the second limiting plate 32 with respect to the X axis (that is, the angle can be closer to 90 degrees with respect to the X axis).
- the bending angle may be relatively increased in a region where directivity does not deteriorate so much and the bending angle may be relatively decreased in a region where directivity may deteriorate.
- the directivity tends to deteriorate near the vicinity of the injection port 11, and the directivity does not easily deteriorate when moving away from the injection port 11. For this reason, for example, as shown in FIGS. 11B and 11C, a region P ⁇ b> 1 that is relatively close to the injection port 11 as indicated by a one-dot chain line when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- the bending angle is relatively small, and regions P2 and P3 (for example, Y of the restriction plate opening 23) that are relatively far from the injection port 11 indicated by a two-dot chain line
- the bending angle may be relatively increased in the upper region on the both axial ends.
- FIG. 11C when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, the distance from the injection port 11 (that is, from the injection port 11 itself or the center of the injection port 11,
- the second limiting plate 32 may be designed or arranged so that the bending angle increases as the distance from the Y-axis increases.
- the second restriction plate 32 may be provided integrally in the regions P1 to P3, or may be provided individually. When the second restriction plates 32 in the regions P1 to P3 are individually provided, the second restriction plate 32 may have a bent shape itself, and the flat second restriction plate 32 may be provided. By combining these, a plurality of second limiting plates 32 may be arranged in a zigzag shape when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- the arrangement density of the second limiting plates 32 is relatively low in the region P1 that is relatively close to the injection port 11 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40. It can be seen that the arrangement density is relatively low in the regions P2 and P3 that are relatively high and relatively far from the injection port 11. Further, in the configuration shown in FIG. 11C, the second restricting plate 32 is arranged so that the disposition density decreases as the distance from the injection port 11 increases when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40. Can be seen when placed.
- the vapor deposition particles 401 with high directivity are not cut, or the cut is suppressed, and the vapor deposition particles 401 with poor directivity and scattered asymptotically in the X-axis direction are efficiently obtained. Can be cut.
- the second restriction plate 32 is illustrated as an example in which the second restriction plate 32 has a bending point in the restriction plate opening 23 between the first restriction plates 22. It goes without saying that the point may be outside the limiting plate opening 23, for example, on the end surface 22 a of the first limiting plate 22. Further, it goes without saying that the second restriction plate 32 may be provided across the plurality of first restriction plates 22 regardless of whether or not the bending point is in the restriction plate opening 23. .
- the end surface 32a of the second limiting plate 32 may have a different bending angle depending on the position of the bending point.
- the second restriction plate 32 may be provided so as to intersect as shown in (h) and (i) of FIG.
- the second limiting plate unit 30 has the second restriction plate unit 30 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40.
- the end surface 32 a of the limiting plate 32 only needs to intersect at least one of the end surface 22 a of the first limiting plate 22 and the limiting plate opening 23 between the first limiting plates 22 in the first limiting plate row 21.
- the second restriction plate 32 is formed so as to have an intersecting portion, so that the directivity that is cut by the second restriction plate 32 is poor. Since the vapor deposition components increase, the vapor deposition blur is further improved.
- the second restriction plates 32 may be arranged apart from each other in the Y-axis direction.
- the 2nd restriction board 32 does not need to form the continuum.
- the second limiting plate 32 when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40, the second limiting plate 32 is provided so as to approach the X axis, thereby passing through the first limiting plate unit 20.
- the vapor deposition particles 401 having low directivity can be efficiently captured by the second restriction plate 32.
- the second limiting plate 32 can be configured by a combination of small parts, maintenance such as replacement of the limiting plate and fine adjustment according to the nozzle distribution / vapor deposition distribution are possible.
- the second limiting plate 32 may be curved or wavy. By doing in this way, the material selectivity for forming the 2nd restriction board 32 can be expanded.
- the second restricting plate 32 if the second restricting plate 32 is provided so as to be asymptotic to the X axis, the second restricting plates 32 are spaced apart from each other in the Y axis direction and arranged in parallel to each other. May be. At this time, as shown in (k) of FIG. 10, it is not always necessary that all the second restriction plates 32 are arranged in parallel. For example, as shown in (l) of FIG. 10, the second restriction plates 32 are arranged in parallel to each other in one second restriction plate row 31 (that is, in the same second restriction plate row 31). However, the second restriction plate 32 may be arranged in a different direction between the second restriction plate rows 31 adjacent in the X-axis direction.
- the direction of the second restriction plate 32 is not necessarily the same in a certain second restriction plate row 31 and the second restriction plate row 31 adjacent to the second restriction plate row 31. .
- the pitch of the second limiting plates 32 in one second limiting plate row 31 may be constant or partially different. May be. Needless to say, the effects described above can be obtained in any case.
- the pitch of the second limiting plate 32 is changed as described above, the arrangement density of the second limiting plate 32 when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40 as described above.
- the pitch of the second restricting plates 32 is relatively set to be relatively high in the region relatively close to the injection port 11 and relatively low in the region relatively far from the injection port 11. It may be designed to be relatively small in the region close to 11 and relatively large in the region relatively far from the injection port 11.
- the vapor deposition particles 401 with high directivity are not cut or the cut is suppressed, and vapor deposition with poor directivity is performed.
- the particles 401 can be cut efficiently.
- Embodiments 1 and 2 differences from Embodiments 1 and 2 will be mainly described, and the same components as those used in Embodiments 1 and 2 have the same functions. A number is assigned and description thereof is omitted.
- FIG. 12 is a perspective view showing a schematic configuration of a main part of the vapor deposition unit 1 in the vapor deposition apparatus 100 according to the present embodiment, together with the film formation substrate 200.
- FIG. 13 is a main part plan view showing a schematic configuration of the limiting plate unit according to the present embodiment.
- the first limiting plate 22 and the first limiting plate 22 are viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- the two restriction plates 32 and the third restriction plate 72 are schematically shown.
- the vapor deposition unit 1 As shown in FIG. 12 and FIG. 13, the vapor deposition unit 1 according to the present embodiment has a vapor deposition particle 401 that has passed through the second restriction plate unit 30 between the second restriction plate unit 30 and the vapor deposition mask 40.
- the vapor deposition unit 1 has the same configuration as that of the vapor deposition unit 1 according to the first embodiment except that a third restriction plate unit 70 that restricts the passage angle is further included.
- the third limiting plate unit 70 is provided between the second limiting plate unit 30 and the vapor deposition mask 40 in the vapor deposition unit 1 according to the first embodiment.
- the third restriction plate unit 70 may be provided between the second restriction plate unit 30 and the vapor deposition mask 40. Needless to say.
- the third limiting plate unit 70 includes third limiting plate rows 71A and 71B composed of a plurality of third limiting plates 72.
- the third limiting plate rows 71A and 71B are respectively disposed along the X axis, and the third limiting plate row 71A and the third limiting plate row 71B are separated from each other in the Y axis direction. Is provided.
- a plurality of third restriction plates 72 are arranged in the X-axis direction at the same pitch.
- one limiting plate opening 73 is formed as an opening region between the third limiting plates 72 adjacent in the X-axis direction.
- the pitch of the restriction plate openings 73 is formed to be larger than the pitch of the mask openings 41, and when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40, it is between the third restriction plates 72 adjacent in the X-axis direction. Are provided with a plurality of mask openings 41.
- the first limiting plate 22 and the third limiting plate 72 each have a YZ plane as a main surface.
- the XZ plane is the main surface of the second limiting plate 32.
- the third limiting plates 72 are each arranged so as to be perpendicular to the main surface of the vapor deposition mask 40. For this reason, each of the third limiting plates 72 is arranged so that the front and back surfaces, which are the main surfaces, face the direction perpendicular to the deposition surface 201 of the deposition target substrate 200. They are arranged adjacent to each other in the X-axis direction.
- the third restriction plate 72 is installed so as not to be parallel to the second restriction plate 32 on the same YZ plane.
- the third limiting plates 72 are each formed of a plate-like member having the same dimensions. However, the third limiting plate 72 does not have to have the same dimensions as the first limiting plate 22 and the second limiting plate 32.
- each of the third restriction plates 72 is formed in a rectangular shape, for example.
- the shape of the third restriction plate 72 is not limited to this, For example, like the first limiting plate 22, it may be formed in a rectangular shape.
- the vapor deposition particles 401 ejected from the vapor deposition source 10 pass through the first limiting plate unit 20, then pass through the second limiting plate unit 30, and then the third limiting plate.
- the light passes through the unit 70, enters the mask opening 41 formed in the vapor deposition mask 40, and is vapor deposited on the deposition target substrate 200.
- the third limiting plate unit 70 causes the vapor deposition particles 401 incident on the third limiting plate unit 70 to be in accordance with the incident angle in the same manner as the first limiting plate unit 20 and the second limiting plate unit 30. Selectively capture.
- the third limiting plate 72 is not heated or cooled by a heat exchanger (not shown) in order to cut the oblique deposition components. For this reason, the third restricting plate 72 is also at a temperature lower than the injection port 11 of the vapor deposition source 10 (more strictly, a temperature lower than the vapor generation particle generation temperature at which the vapor deposition material becomes a gas).
- the third restriction plate unit 70 may be provided with a cooling mechanism (not shown) for cooling the third restriction plate 72 as necessary.
- the third restriction plate 72 can be fixed by using the same method as that for fixing the first restriction plate 22 and the second restriction plate 32. That is, also in the present embodiment, the same method as the fixing method of the first limiting plate 22 and the second limiting plate 32 shown in FIGS. 4 to 6 can be used.
- the vapor deposition flow obtained by cutting the vapor deposition component with a slight decrease in directivity in the second limiting plate unit 30 enters the third limiting plate unit 70.
- the vapor deposition component whose directivity has decreased can be cut by the third limiting plate 72.
- the vapor deposition component with poor directivity that could not be cut by the second limiting plate 32 can be cut by the third limiting plate 72.
- the vapor deposition components with poor directivity that could not be cut by the second limiting plate 32 the vapor deposition components that changed into components with high directivity by repeated collision scattering between particles were obtained by the third limiting plate 72. It can be used as the deposited film 402 without being cut.
- the functions can be separated into the respective restriction plate units. No need to design in complex shapes or arrangements.
- vapor deposition blur by providing a plurality of limiting plate units, in particular, by providing a plurality of limiting plate units between the first limiting plate unit 20 and the vapor deposition mask 40 as described above, vapor deposition blur. It is easy to prevent evaporation blur and improve material utilization efficiency without reducing material use efficiency or sacrificing evaporation blur because it does not reduce material use efficiency. And it is possible to achieve both.
- the third limiting plate unit 70 by providing the third limiting plate unit 70 on the downstream side of the second limiting plate unit 30, directivity including vapor deposition components asymptotically or completely parallel to the X axis is provided. It is possible to cut a vapor deposition component having poor properties. That is, according to the present embodiment, as described above, the third limiting plate 72 is completely parallel to the Y axis, so that even a vapor deposition component completely parallel to the X axis can be cut.
- the third restriction plate 72 having the third restriction plate 72 parallel to the Y axis on the uppermost stage (in other words, the most downstream side) closest to the vapor deposition mask 40 among the restriction plate units constituted by a plurality of stages.
- the vapor deposition particles 401 can be incident on the mask opening 41 of the vapor deposition mask 40 with the vapor deposition component having poor directivity removed at the end.
- the vapor deposition components with poor directivity are cut by the first limiting plate unit 20 and the second limiting plate unit 30, so that there are many vapor deposition components with high directivity. pass.
- the 3rd restriction board 72 is installed in the restriction board opening 23 between the 1st restriction boards 22, highly directivity vapor deposition controlled by the 1st restriction board unit 20 and the 2nd restriction board unit 30 will be carried out.
- Even components may be cut by the third limiting plate 72. For this reason, it is desirable that the third restriction plate 72 be installed on the first restriction plate 22.
- the vapor deposition source 10 the first limiting plate unit 20, the second limiting plate unit 30, the third limiting plate unit 70, and the vapor deposition mask 40 are separated from each other.
- the vapor deposition source 10, the first limiting plate unit 20, the second limiting plate unit 30, the third limiting plate unit 70, and the vapor deposition mask 40 are shown as an example. They may be provided apart from each other, or may be provided in contact with or integrated with each other. The advantages and disadvantages in this case are the same as the advantages and disadvantages described in the first embodiment.
- the vapor deposition unit 1 is provided between the vapor deposition mask 40, the vapor deposition source 10 that ejects the vapor deposition particles 401 toward the vapor deposition mask 40, and the vapor deposition mask 40 and the vapor deposition source 10.
- a plurality of limiting plate units having at least a first limiting plate unit 20 and a second limiting plate unit 30 for limiting the passing angle of the vapor deposition particles 401, and the first limiting plate unit 20 includes the vapor deposition.
- No restriction plate 32 When viewed from a direction perpendicular to the main surface of the vapor deposition mask 40, the second limiting plate 32 extends in a direction intersecting a second direction (Y-axis direction) perpendicular to the first direction. It is installed.
- the vapor deposition unit 1 is configured such that the end surface 32a of the second limiting plate 32 is between the end surface 22a of the first limiting plate 22 and the first limiting plate 22 in the first limiting plate example 21. Of at least one of the opening regions (restriction plate opening 23).
- the vapor deposition flow whose directivity is improved by the first restriction plate 22 has poor directivity after passing through the opening region (restriction plate opening 23) between the first restriction plates 22 (so-called isotropic). Even if the distribution is reduced, the second limiting plate 32 can cut the vapor deposition component (vapor deposition particles 401) having poor directivity.
- the vapor deposition particles 401 that have passed through the second limiting plate unit 30 pass through the vapor deposition mask 40 while maintaining high directivity, and are vapor deposited on the deposition target substrate 200. For this reason, vapor deposition blur can be suppressed and a high-definition vapor deposition film pattern with very little vapor deposition blur can be formed.
- the said vapor deposition unit 1 is equipped with the multi-stage restriction
- the vapor deposition unit 1 it is possible to suppress vapor deposition blur at a high rate, improve material utilization efficiency, and improve yield and productivity.
- the vapor deposition unit 1 according to the second aspect of the present invention is the vapor deposition unit 1 according to the first aspect, wherein the first limiting plate 22 and the second limiting plate 32 are provided perpendicular to the main surface of the vapor deposition mask 40, respectively. Is preferred.
- the arrangement of the first limiting plate 22 and the second limiting plate 32 is easy, and there is no fear of cutting vapor deposition particles having high directivity.
- the vapor deposition unit 1 according to the aspect 3 of the present invention has the first restriction plate 22 and the second restriction when the vapor deposition unit 1 according to the aspect 1 or 2 is viewed from a direction perpendicular to the main surface of the vapor deposition mask 40. It is preferable that the end surfaces of the plate 32 extend in directions orthogonal to each other.
- the second limiting plate unit 30 is provided apart from each other in the second direction perpendicular to the first direction when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40. It is preferable that a second limiting plate row 31 composed of the plurality of second limiting plates 32 is provided.
- the vapor deposition unit 1 according to the aspect 4 of the present invention is the vapor deposition unit 1 according to the aspect 1 or 2 described above, when the second restriction plate 32 is viewed from a direction perpendicular to the main surface of the vapor deposition mask 40. It is preferable that it is formed asymptotically in this direction.
- the second restricting plate 32 is arranged so that each individual second restricting plate 32 asymptotically approaches the first direction when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- the bending line of the second limiting plate 32 may be formed so as to approach the first direction.
- the vapor deposition particles 401 tend to fly closer to the X axis as the directivity decreases. For this reason, when the directivity deterioration is extremely large, in order to capture the vapor deposition particles 401 having low directivity by the second restriction plate 32, the second restriction plate 32 is perpendicular to the main surface of the vapor deposition mask 40. When viewed from the direction, it is preferably formed so as to approach the first direction.
- the second restriction plate 32 has at least one bending point. It is preferable to have one.
- the second limiting plate 32 is bent in this way, so that the second limiting plate 32 is provided in a continuous manner in the second direction asymptotically in the first direction.
- the end surface of the second limiting plate 32 when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40 in the fifth aspect, has a bending point. It is preferable to have a plurality.
- the second restriction plate 32 may be formed in a zigzag shape, for example.
- the number of vapor deposition components (vapor deposition particles 401) having poor directivity that are cut by the second restricting plate 32 increases, so that the vapor deposition blur can be further improved.
- the second restriction plate 32 is an injection port of the vapor deposition source 10. 11 may be provided only in the vicinity of 11.
- the vapor deposition unit 1 according to the aspect 7 of the present invention is arranged side by side along the second direction when viewed from the direction perpendicular to the main surface of the vapor deposition mask 40 in the aspect 5 or 6. It may have a configuration that is provided only in a region that overlaps the row of the injection ports 11 of the vapor deposition source 10.
- the vapor deposition unit 1 according to the eighth aspect of the present invention is the vapor deposition unit 1 according to any one of the fifth to seventh aspects, when the injection port 11 of the vapor deposition source 10 is viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- the vapor deposition unit 1 according to the ninth aspect of the present invention is an area relatively close to the emission port 11 of the vapor deposition source 10 when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40 in the sixth aspect.
- the region P1 for example, the region P1 above the center of the restriction plate opening 23
- the bending angle of the second restriction plate 32 is relatively small, and the region is relatively far from the injection port 11 (for example, Y of the restriction plate opening 23).
- the bending angle of the second limiting plate 32 is relatively large.
- the vapor deposition unit 1 according to the tenth aspect of the present invention is the vapor deposition unit 1 according to the ninth aspect, wherein the second limiting plate 32 has a bending angle when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40. It is preferable that the distance increases from the outlet 11 of the source 10.
- the vapor deposition density is high and there are many collisions of the vapor deposition particles 401, so the directivity tends to deteriorate.
- the distance from the injection port 11 is increased, the vapor deposition density is lowered, and the directivity is hardly deteriorated.
- the vapor deposition particles 401 having high directivity are not cut, or the cut is suppressed, and the vapor deposition particles 401 having poor directivity and scattered asymptotically in the X-axis direction. Can be cut efficiently.
- the second restriction plate 32 intersects with each other when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40 in the fourth aspect. Is preferred.
- the vapor deposition component with poor directivity that is cut by the second limiting plate 32 increases, so that the vapor deposition blur can be further improved.
- the vapor deposition unit 1 according to the twelfth aspect of the present invention is the vapor deposition unit 1 according to any of the first to eleventh aspects, wherein the second limiting plate is viewed from a direction perpendicular to the main surface of the vapor deposition mask, respectively. It is preferable that the first restriction plate is provided continuously in the first direction so as to straddle the plurality of first restriction plates.
- the second limiting plate can be easily disposed.
- the vapor deposition unit 1 according to the thirteenth aspect of the present invention is the vapor deposition unit 1 according to any one of the first to twelfth aspects, when the second restriction plate 32 is viewed from a direction perpendicular to the main surface of the vapor deposition mask 40. It is preferable that a plurality are provided in the first direction and the second direction.
- the second limiting plate 32 can be configured by a combination of small parts, maintenance such as replacement of the limiting plate and fine adjustment according to the nozzle distribution / vapor deposition distribution are possible.
- the first limiting plate 22 and the second limiting plate 32 are provided apart from each other. preferable.
- the vapor deposition unit 1 according to the aspect 15 of the present invention is such that, in any of the above aspects 1 to 14, the first limiting plate 22 and the second limiting plate 32 are provided in contact with each other. preferable.
- the low-directivity vapor deposition particles 401 after passing through the first limiting plate 22 can be reliably captured, and vapor deposition blur is hardly generated.
- the first limiting plate 22 and the second limiting plate 32 can be very accurately aligned by pin alignment or the like.
- the second restriction plate 32 can be replaced with the first restriction plate 22 without providing a separate cooling mechanism for the second restriction plate 32. It can cool using the provided cooling mechanism. For this reason, the reevaporation of the trapped vapor deposition particles 401 can be prevented with a simple configuration.
- the vapor deposition unit 1 according to the sixteenth aspect of the present invention is the vapor deposition unit 1 according to any one of the first to fifteenth aspects, wherein the plurality of restriction plate units are disposed between the second restriction plate unit 30 and the vapor deposition mask 40.
- the third limiting plate unit 70 further includes a third limiting plate unit 70 that limits the passage angle of the vapor deposition particles 401 that have passed through the second limiting plate unit 30.
- a third limiting plate row 71 composed of a plurality of third limiting plates 72 provided in parallel to each other and spaced apart from each other in the first direction is provided. It is preferable.
- the vapor deposition components with poor directivity that could not be cut by the second restriction plate 32 the vapor deposition components that have changed into components with high directivity by repeated collision scattering between the vapor deposition particles are the third restriction. Without being cut by the plate 72, it can be used as the vapor deposition film 402.
- the functions can be separated into the respective restriction plate units. Without designing the shape or arrangement, it is possible to cut vapor deposition components with poor directivity, including vapor deposition components that are asymptotically or completely parallel to the X axis. For this reason, prevention of vapor deposition blur and improvement of material utilization efficiency can both be achieved easily and reliably.
- the vapor deposition unit 1 according to the seventeenth aspect of the present invention is the vapor deposition unit 1 according to any one of the first to sixteenth aspects, when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40.
- a relatively close region for example, the region P1 above the central portion of the restricting plate opening 23
- the arrangement density of the second restricting plates 32 is relatively high, and a region (for example, relatively far from the injection port 11).
- the arrangement density of the second limiting plates 32 is relatively low.
- the vapor deposition unit 1 according to the aspect 18 of the present invention is the vapor deposition unit 1 according to the aspect 17 described above, wherein the arrangement density of the second limiting plates 32 is as described above when viewed from a direction perpendicular to the main surface of the vapor deposition mask 40. It is preferable that it becomes so low that it leaves
- the vapor deposition particles 401 with high directivity are not cut, or the cut is suppressed, and the vapor deposition particles 401 with poor directivity and scattered asymptotically in the X-axis direction are efficiently used. Can cut well.
- the vapor deposition apparatus 100 includes the vapor deposition unit 1 according to any one of the first to eighteenth aspects, the vapor deposition mask 40 and the deposition target substrate 200 in the vapor deposition unit 1, A moving device (the substrate moving device 103 or the vapor deposition unit moving device 104) that relatively moves one of the vapor deposition unit 1 and the deposition target substrate 200 so that the second direction is the scanning direction;
- the width of the vapor deposition mask 40 in the second direction is smaller than the width of the film formation substrate 200 in the second direction, and is emitted from the vapor deposition source 10 while scanning along the second direction.
- the vapor deposition particles 401 are vapor-deposited on the deposition target substrate 200 through the plurality of limiting plate units and the openings of the vapor deposition mask 40.
- the present invention relates to a vapor deposition unit used for scanning vapor deposition using a scanning method, in which vapor deposition is performed while relatively moving a deposition target substrate and a vapor deposition unit, and using such a vapor deposition unit. It can be suitably used for a vapor deposition apparatus for forming a predetermined pattern.
- the vapor deposition unit and the vapor deposition apparatus of the present invention are suitably used for an organic EL display device manufacturing apparatus, a manufacturing method, and the like used in a film forming process such as separate formation of an organic layer in an organic EL display device. Can do.
- Vapor deposition unit 10 Vapor deposition source 11 Injection port 20 1st restriction board unit 21 1st restriction board row
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Abstract
Description
本発明の実施の一形態について図1~図7に基づいて説明すれば以下の通りである。
図1は、本実施の形態にかかる蒸着装置100(図6参照)における蒸着ユニット1の要部の概略構成を、被成膜基板200と併せて示す斜視図である。
蒸着源10は、例えば、内部に蒸着材料を収容する容器である。蒸着源10は、容器内部に蒸着材料を直接収容する容器であってもよく、ロードロック式の配管を有し、外部から蒸着材料が供給されるように形成されていてもよい。
蒸着マスク40は、その主面(面積が最大である面)であるマスク面がXY平面と平行な板状物である。スキャン蒸着を行う場合、蒸着マスク40には、被成膜基板200よりも少なくともY軸方向のサイズが小さな蒸着マスクが使用される。
前述したように、第1の制限板ユニット20および第2の制限板ユニット30は、蒸着源10と蒸着マスク40との間に、Z軸方向に沿って、蒸着源10側からこの順に配されている。
第1の制限板22および第2の制限板32は、それぞれ、蒸着マスク40の主面に対して垂直となるように配されている。つまり、第1の制限板22および第2の制限板32は、それぞれ、その主面である表裏面が、被成膜基板200の被蒸着面201に垂直な方向を向くように配されている。このため、第1の制限板22は、それぞれの主面がX軸方向に隣り合うように配されており、第2の制限板32は、それぞれの主面がY軸方向に隣り合うように配されている。
次に、上記蒸着ユニット1による蒸着ボケの抑制効果について、図1~図3を参照して以下に説明する。
図4は、第1の制限板ユニット20および第2の制限板ユニット30の概略構成の一例を示す斜視図である。
なお、図1では、蒸着源10、第1の制限板ユニット20、第2の制限板ユニット30、蒸着マスク40が、Z軸方向に互いに一定距離離間して設けられている場合を例に挙げて図示した。
この場合、第1の制限板22を通過後の低指向性の蒸着粒子401を確実に捕捉することができ、蒸着ボケが発生し難いという利点がある。
この場合、第1の制限板22を通過後に低指向性化した蒸着粒子401が高指向性化する機会を活かすことができる。このため、材料利用効率の低下を抑制することができるという利点がある。
この場合、第2の制限板32と蒸着マスク40とをピンアライメント等で極めて正確に位置合わせすることができる。このため、第2の制限板32の上端部と蒸着マスク40とが密着していない場合と比べて、第2の制限板32と蒸着マスク40との位置合わせが容易であるという利点がある。
この場合、蒸着マスク40に損傷が生じる懸念はなく、蒸着マスク40の精度低下は起こらない。
次に、図6を参照して、上記蒸着ユニット1を用いた蒸着装置100の一例について説明する。
基板ホルダ102は、被成膜基板200を保持する基板保持部材である。基板ホルダ102は、TFT基板等からなる被成膜基板200を、その被蒸着面201が、蒸着ユニット1における蒸着マスク40に面するように保持する。
本実施の形態では、基板移動装置103および蒸着ユニット移動装置104の少なくとも一方により、被成膜基板200と、蒸着ユニット1とを、Y軸方向が走査方向となるように相対的に移動させてスキャン蒸着を行う。
蒸着ユニット1は、蒸着源10、第1の制限板ユニット20、第2の制限板ユニット30、蒸着マスク40、ホルダ50、防着板60、および図示しないシャッタ等を備えている。なお、蒸着源10、第1の制限板ユニット20、第2の制限板ユニット30、蒸着マスク40については、既に説明したため、ここでは、その説明を省略する。
ホルダ50は、蒸着源10、第1の制限板ユニット20、第2の制限板ユニット30、蒸着マスク40を保持する保持部材である。
上記蒸着装置100において、蒸着源10から飛散した蒸着粒子401は、蒸着マスク40内に飛散するように調整されており、蒸着マスク40外に飛散する蒸着粒子は、防着板60(遮蔽板)等で適宜除去される構成としてもよい。
被成膜基板200の方向に蒸着粒子を飛来させないときには、図示しないシャッタを用いて、蒸着粒子401の蒸着マスク40への到達を制御することが望ましい。
(第2の制限板ユニット30)
図7は、本実施の形態にかかる制限板ユニットの他の概略構成を示す要部平面図であり、蒸着マスク40の主面に垂直な方向から見たときの第1の制限板22および第2の制限板32を、高レート時に第1の制限板22を通過した蒸着粒子401と併せて模式的に示している。
図1では、蒸着源10が被成膜基板200の下方に配されており、被成膜基板200が、その被蒸着面201が下方を向いている状態で、蒸着源10から蒸着粒子401を上方に向かって射出して被成膜基板200に蒸着(アップデポジション)させる場合を例に挙げて示している。
なお、本実施の形態では、第1の制限板22および第2の制限板32が蒸着マスク40の主面に垂直に設けられている場合を例に挙げて説明したが、第1の制限板22および第2の制限板32の主面がZ軸方向に対して傾斜して設けられていても構わない。
本実施の形態について図8ないし図11の(a)~(c)に基づいて説明すれば、以下の通りである。
図10の(a)~(l)は、本実施の形態にかかる制限板ユニットの他の概略構成を示す要部平面図であり、それぞれ、蒸着マスク40の主面に垂直な方向から見たときの第1の制限板22および第2の制限板32を模式的に示している。
本実施の形態について図12および図13に基づいて説明すれば、以下の通りである。
第3の制限板72は、それぞれ、蒸着マスク40の主面に対して垂直となるように配されている。このため、第3の制限板72は、それぞれ、その主面である表裏面が、被成膜基板200の被蒸着面201に垂直な方向を向くように配されており、それぞれの主面がX軸方向に隣り合うように配されている。
本実施の形態によれば、第2の制限板ユニット30で指向性の低下が軽微な蒸着成分がカットされた蒸着流が、第3の制限板ユニット70に入射する。その際、指向性が低下してしまった蒸着成分を第3の制限板72でカットすることができる。また第2の制限板32でカットしきれなかった指向性の悪い蒸着成分も上記第3の制限板72でカットできる。
なお、本実施の形態では、図13に示すように、第3の制限板72を第1の制限板22に重畳して設置する場合を例に挙げて図示したが、本実施の形態は、これに限定されるものではない。
本発明の態様1にかかる蒸着ユニット1は、蒸着マスク40と、上記蒸着マスク40に向かって蒸着粒子401を射出する蒸着源10と、上記蒸着マスク40と蒸着源10との間に設けられ、上記蒸着粒子401の通過角度を制限する第1の制限板ユニット20および第2の制限板ユニット30を少なくとも有する複数段の制限板ユニットとを備え、上記第1の制限板ユニット20は、上記蒸着マスク40の主面に垂直な方向(Z軸方向)から見たときに、第1の方向(X軸方向)に互いに離間し、かつ、互いに平行に設けられた、複数の第1の制限板22からなる第1の制限板列21を備え、上記第2の制限板ユニット30は、上記第1の制限板ユニット20と蒸着マスク40との間に設けられており、かつ、複数の第2の制限板32を備え、上記蒸着マスク40の主面に垂直な方向から見たときに、上記第2の制限板32が、上記第1の方向に垂直な第2の方向(Y軸方向)に交差する方向に延設されている。
10 蒸着源
11 射出口
20 第1の制限板ユニット
21 第1の制限板列
22,22A,22B 第1の制限板
22a 端面
23,23A,23B 制限板開口(開口領域)
24 第1の保持部材
25 第2の保持部材
26 保持体
27 支持部
28 隙間
30 第2の制限板ユニット
31 第2の制限板列
32 第2の制限板
32a 端面
33 制限板開口(開口領域)
34 第1保持部材
35 第2保持部材
36 保持体
37 支持部
40 蒸着マスク
41 マスク開口
42 アライメントマーカ
50 ホルダ
51 スライド装置
52 支持部材
53 テンション機構
60 防着板
70 第3の制限板ユニット
71,71A,71B 第3の制限板列
72 第3の制限板
73 制限板開口(開口領域)
100 蒸着装置
101 真空チャンバ
102 基板ホルダ
103 基板移動装置
104 蒸着ユニット移動装置
105 イメージセンサ
200 被成膜基板
201 被蒸着面
202 アライメントマーカ
401 蒸着粒子
402 蒸着膜
Claims (15)
- 蒸着マスクと、
上記蒸着マスクに向かって蒸着粒子を射出する蒸着源と、
上記蒸着マスクと蒸着源との間に設けられ、上記蒸着粒子の通過角度を制限する第1の制限板ユニットおよび第2の制限板ユニットを少なくとも有する複数段の制限板ユニットとを備え、
上記第1の制限板ユニットは、上記蒸着マスクの主面に垂直な方向から見たときに、第1の方向に互いに離間し、かつ、互いに平行に設けられた、複数の第1の制限板からなる第1の制限板列を備え、
上記第2の制限板ユニットは、上記第1の制限板ユニットと蒸着マスクとの間に設けられており、かつ、複数の第2の制限板を備え、
上記蒸着マスクの主面に垂直な方向から見たときに、上記第2の制限板が、上記第1の方向に垂直な第2の方向に交差する方向に延設されていることを特徴とする蒸着ユニット。 - 上記第1の制限板および第2の制限板は、それぞれ、上記蒸着マスクの主面に垂直に設けられていることを特徴とする請求項1に記載の蒸着ユニット。
- 上記蒸着マスクの主面に垂直な方向から見たときに、上記第1の制限板と第2の制限板とは、互いの端面が互いに直交する方向に延設されていることを特徴とする請求項1または2に記載の蒸着ユニット。
- 上記第2の制限板は、上記蒸着マスクの主面に垂直な方向から見たときに、上記第1の方向に漸近するように形成されていることを特徴とする請求項1または2に記載の蒸着ユニット。
- 上記蒸着マスクの主面に垂直な方向から見たときに、上記第2の制限板が、屈曲点を少なくとも1つ有していることを特徴とする請求項4に記載の蒸着ユニット。
- 上記蒸着マスクの主面に垂直な方向から見たときに、上記第2の制限板の端面が、屈曲点を複数有していることを特徴とする請求項5に記載の蒸着ユニット。
- 上記蒸着マスクの主面に垂直な方向から見たときに、上記蒸着源の射出口に相対的に近い領域では上記第2の制限板の屈曲角度が相対的に小さく、上記射出口から相対的に遠い領域では、上記第2の制限板の屈曲角度が相対的に大きいことを特徴とする請求項6に記載の蒸着ユニット。
- 上記蒸着マスクの主面に垂直な方向から見たときに、上記第2の制限板が互いに交差していることを特徴とする請求項4に記載の蒸着ユニット。
- 上記第2の制限板は、上記蒸着マスクの主面に垂直な方向から見たときに、それぞれ、上記複数の第1の制限板を跨ぐように上記第1の方向に連続して設けられていることを特徴とする請求項1~8の何れか1項に記載の蒸着ユニット。
- 上記第2の制限板は、上記蒸着マスクの主面に垂直な方向から見たときに、上記第1の方向および第2の方向に複数設けられていることを特徴とする請求項1~9の何れか1項に記載の蒸着ユニット。
- 上記第1の制限板と第2の制限板とが互いに離間して設けられていることを特徴とする請求項1~10の何れか1項に記載の蒸着ユニット。
- 上記第1の制限板と第2の制限板とが互いに接触して設けられていることを特徴とする請求項1~10の何れか1項に記載の蒸着ユニット。
- 上記複数段の制限板ユニットは、上記第2の制限板ユニットと蒸着マスクとの間に、上記第2の制限板ユニットを通過した蒸着粒子の通過角度を制限する第3の制限板ユニットをさらに有しており、
上記第3の制限板ユニットは、上記蒸着マスクの主面に垂直な方向から見たときに、少なくとも、第1の方向に互いに離間し、かつ、互いに平行に設けられた、複数の第3の制限板からなる第3の制限板列を備えていることを特徴とする請求項1~12の何れか1項に記載の蒸着ユニット。 - 上記蒸着マスクの主面に垂直な方向から見たときに、上記蒸着源の射出口に相対的に近い領域では上記第2の制限板の配設密度が相対的に高く、上記射出口から相対的に遠い領域では、上記第2の制限板の配設密度が相対的に低いことを特徴とする請求項1~13の何れか1項に記載の蒸着ユニット。
- 請求項1~14の何れか1項に記載の蒸着ユニットと、
上記蒸着ユニットにおける蒸着マスクと被成膜基板とを対向配置した状態で、上記蒸着ユニットおよび上記被成膜基板のうち一方を、上記第2の方向が走査方向となるように相対移動させる移動装置とを備え、
上記蒸着マスクの上記第2の方向の幅は、上記第2の方向における被成膜基板の幅よりも小さく、
上記第2の方向に沿って走査しながら、上記蒸着源から出射された蒸着粒子を、上記複数段の制限板ユニットおよび上記蒸着マスクの開口部を介して上記被成膜基板に蒸着させることを特徴とする蒸着装置。
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