KR20130074696A - Optical interconnection module, printed circuit board and method manufacturing of the pcb the same - Google Patents

Abstract

A case forming an appearance according to an embodiment of the present invention and having a first groove formed in a central area thereof; An optical transmitter inserted into the first groove of the case and transmitting an optical signal; And a light reflection part formed at an edge region of the case and having a first inclination angle with respect to a traveling path of the optical signal.

Description

Optical connection module, optical printed circuit board including the same, and a manufacturing method therefor {OPTICAL INTERCONNECTION MODULE, PRINTED CIRCUIT BOARD AND METHOD MANUFACTURING OF THE PCB THE SAME}

The present invention relates to an optical printed circuit board including the optical connection module and a manufacturing method thereof.

A printed circuit board (PCB), which is generally used, is an electrical printed circuit board, which is coated with a substrate on which a copper thin film circuit is implemented, and is used by electric signal transmission by inserting various components. Such a conventional electric printed circuit board has a problem in signal transmission because it can not follow the electric signal transmission capability of the substrate rather than the processing capability of an electric element as a component.

Especially, these electric signals are sensitive to the external environment and generate noises, which is a great obstacle to electronic products requiring high precision. As a complement to this, an optical printed circuit board using an optical waveguide was developed instead of a metallic circuit such as copper of an electric printed circuit board, and it became possible to produce a high-precision high-tech equipment more stable in radio interference and noise phenomenon.

According to the prior art, in the case of an optical printed circuit board, an optical waveguide is manufactured by bending an optical fiber at 90 degrees as disclosed in Prior Art 1 (Publication No. 10-2011-0038522), or in Prior Art 2 (Publication No. 10-2010-). An optical waveguide is fabricated by forming a mirror in the inner core layer as disclosed in 0112731.

However, in the prior document 1, in the manufacture of the optical printed circuit board, a structure in which the optical fiber is folded at 90 degrees to connect the optical fiber with the signal transmission unit TX and the signal receiving unit RX, the optical fiber The light loss occurs in the process of turning the angle to 90 °. In addition, when there is a step between the bent portion of the optical fiber and the printed circuit board layer during the lamination process for embedding in the printed circuit board, high pressure is applied and transmission loss occurs. In addition, the total thickness of the optical module including the bent portion will increase the overall thickness of the printed circuit board.

In addition, in the prior document 2, the core protruding to the outside is difficult to maintain the angle due to deformation (rolling or torsion, etc.) due to heat, pressure, and resin flow during lamination during the process of embedding the printed circuit board. have.

In an embodiment according to the present invention, an optical connection module having a new structure, an optical printed circuit board including the same, and a manufacturing method thereof are provided.

 Technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above are clearly understood by those skilled in the art to which the embodiments proposed from the following description belong. Could be.

A case forming an appearance according to an embodiment of the present invention and having a first groove formed in a central area thereof; An optical transmitter inserted into the first groove of the case and transmitting an optical signal; And a light reflection part formed at an edge region of the case and having a first inclination angle with respect to a traveling path of the optical signal.

In addition, the first groove is formed in a first direction corresponding to the longitudinal direction of the case, and the light reflecting portion is formed in a second direction perpendicular to the first direction.

In addition, the optical transmission unit includes a core layer for transmitting an optical fiber or an optical signal and at least one clad layer surrounding the core layer.

In addition, the case is formed of a transparent liquid material having a lower refractive index than the core layer and the cladding layer.

In addition, the light reflecting portion is embedded in the edge region of the case, the first surface is a light reflection block having an inclination angle with respect to the traveling path of the optical signal, a metal material is formed on the first surface of the light reflection block. .

The light reflection part may be a second groove formed in an edge region of the case, and the first surface of the second groove may have an inclination angle with respect to a path of the optical signal, and a metal material may be formed.

In addition, a through hole is formed in an edge region of the case in which the light reflection part is formed, and a conductive ball for connecting with a metal terminal of the optical device is inserted into the through hole.

In addition, the case is formed to a thickness that meets 0.05 ~ 0.1mm, the first groove has a depth in the range of 0.028 ~ 0.075mm and a width in the range of 0.1 ~ 0.12mm.

In addition, the first surface of the light reflection part has an inclination angle of at least one of 45 ° and 135 °.

On the other hand, an optical printed circuit board according to an embodiment of the present invention is an insulating layer; And an optical connection module embedded in the insulating layer and configured to transmit an optical signal, the optical connection module comprising: a case having an appearance and having a first groove formed in a central area thereof; An optical transmitter inserted into the first groove of the case and transmitting an optical signal; And a light reflecting part formed at an edge region of the case and having a first inclined angle with respect to a traveling path of the optical signal.

In addition, the first groove formed in the case is formed in a first direction corresponding to the longitudinal direction of the case, the light reflecting portion is formed in a second direction perpendicular to the first direction.

The optical transmission unit may be an optical waveguide or an optical waveguide including a core layer for transmitting an optical signal and at least one clad layer surrounding the core layer.

In addition, the case is formed of a transparent liquid material having a lower refractive index than the core layer and the cladding layer.

The light reflecting portion is embedded in an edge region of the case, and a first surface is a light reflecting block having the inclination angle, and a metal material is formed on the first surface of the light reflecting block.

The light reflecting part may be a second groove formed in an edge region of the case, and the first surface of the second groove may have an inclination angle with respect to a traveling path of the optical signal, and a metal material may be formed.

In addition, an optical element is formed on the optical connection module on which the light reflecting part is formed, and a through hole for inserting a conductive ball connected to a metal terminal of the optical element is formed in an edge region of the case.

In addition, the case is formed to a thickness that meets 0.05 ~ 0.1mm, the first groove has a depth in the range of 0.028 ~ 0.075mm and a width in the range of 0.1 ~ 0.12mm.

Further, the first surface of the light reflecting portion has an inclination angle of at least one of 45 ° and 135 °.

On the other hand, the method of manufacturing an optical printed circuit board according to an embodiment of the present invention, forming an appearance, preparing a case having a first groove formed in the central region; Inserting an optical transmitter for transmitting an optical signal into a first groove of the prepared case; And embedding the case into which the light transmission unit is inserted into the insulating layer.

The preparing of the case may include preparing a case in which a light reflecting block having a predetermined inclination angle with respect to a traveling path of the optical signal is embedded in a first surface, and the light reflecting block is formed at an edge region of the case. Is formed.

The preparing of the case may include preparing a case in which a second groove is formed in an edge region, and the first surface of the second groove has a predetermined inclination angle with respect to the traveling path of the optical signal.

In addition, the first groove is formed in a first direction corresponding to the longitudinal direction of the case, the light reflection block or the second groove is formed in a second direction perpendicular to the first direction.

In addition, a metal material for reflecting the optical signal is formed on the first surface.

The inserting of the optical transmission unit may include inserting an optical fiber into the first groove; Or inserting an optical waveguide including a core layer for transmitting an optical signal to the first groove and at least one clad layer surrounding the core layer.

In addition, preparing the case may include preparing a case formed of a transparent liquid material having a lower refractive index than the core layer and the clad layer.

In addition, the through hole is formed in the edge region of the case, and further comprising the step of attaching the optical device on the case by inserting a conductive ball connected to the metal terminal of the optical device in the through hole.

In addition, the case is formed to a thickness satisfying 0.05 ~ 0.1mm, the first grooves satisfy a depth in the range of 0.028 ~ 0.075mm and a width in the range of 0.1 ~ 0.12mm.

According to the embodiment of the present invention, by manufacturing the optical connection module using the optical transmission unit having an inclination angle of 45 degrees can improve the optical loss characteristics and reduce the overall thickness of the printed circuit board.

In addition, by providing an optical connection module in which the light reflection block, the optical element and the optical transmission unit are integrated, it is possible to easily align the optical element and the optical transmission unit, to form a through hole in the optical connection module, and in the formed through hole By forming the conductive balls, it is possible to solve the distortion problem occurring during the optical device mounting and reflow process.

1 is a view showing an optical connection module according to a first embodiment of the present invention.
2 to 4 are diagrams illustrating a method of manufacturing the optical connection module shown in FIG. 1 in order of process.
5 is a view showing an optical connection module according to a second embodiment of the present invention.
6 to 8 are views illustrating a method of manufacturing the optical connection module shown in FIG. 5 in order of process.
9 is a cross-sectional view of an optical printed circuit board according to an exemplary embodiment of the present invention.
10 to 13 are cross-sectional views illustrating a method of manufacturing the optical printed circuit board shown in FIG. 9.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In an embodiment according to the present invention, according to an embodiment of the present invention, in providing an optical connection module using an optical transmission unit having an inclination angle of 45 degrees, an optical connection in which an optical reflection block, an optical element, and an optical transmission unit are integrated By fabricating the module, it is possible to easily align between the optical element and the optical transmission unit, and to form a through hole in the optical connection module, and inserting a conductive ball into the formed through hole, which is generated during the optical element mounting and reflow process Try to solve the problem.

1 is a view showing an optical connection module according to a first embodiment of the present invention.

Referring to FIG. 1, the optical connection module 100 forms an exterior, a case 110 in which a first groove 112 and a through hole 116 are formed in a central region, and a first groove of the case 110. Is inserted into the (112), the optical transmission unit 120 for transmitting the optical signal, and is formed embedded in the edge region of the case 110, the first surface has a predetermined inclination angle with respect to the traveling path of the optical signal The light reflector 114 and the optical device 130 attached to the through hole 116 formed in the case 110.

The case 110 forms an appearance of the optical connection module 100. The case 110 is formed of a transparent liquid material having a specific refractive index, and the reference of the refractive index is determined by the refractive index of the material forming the light transmitting unit 120.

That is, the case 110 is formed of a transparent liquid material having a refractive index lower than that of the light transmitting unit 120, which is preferably a light transmitting material capable of transmitting light.

The first groove 112 is formed in the central region of the case 110.

The first groove 112 provides a seating space in which the light transmitting unit 120 may be seated. The first groove 112 may be formed in a single piece, or may be formed in a plurality of pieces. The first groove 112 has a number corresponding to the transmission channel of the optical signal and is formed in the central region of the case 110.

In this case, the first groove 112 is formed in a first direction corresponding to the longitudinal direction of the case 110.

The first groove 112 has a depth that satisfies the range 0.025mm ~ 0.075mm, and has a width that satisfies the range 0.1 ~ 0.12mm.

In addition, the first groove 112 may have a U shape or a V shape according to the shape of the light transmitting part 120 so that the light transmitting part 120 may be easily mounted on the case 110. .

The optical transmitter 120 is inserted into the first groove 112.

The optical transmitter 120 provides a transmission path of the optical signal.

To this end, the optical transmission unit 120 may be composed of an optical fiber (fiber). In addition, the optical transmission unit 120 may be composed of an optical waveguide including a core layer for transmitting an optical signal and at least one clad layer surrounding the core layer.

The light reflecting portion 114 is buried in the edge region of the case 110.

The light reflecting unit 114 is embedded in the edge region of the case 110, and the first surface is a light reflecting block having a predetermined inclination angle with respect to the traveling path of the optical signal.

The light reflection block is formed such that the first surface has a predetermined inclination angle by using a mold. In addition, a metal material is coated on the first surface, and the first surface becomes a metal reflective surface by the formed metal material to reflect the incident optical signal.

The light reflection block may be formed in various shapes according to the shape of the mold. For example, the first surface may have a shape such as a triangular pillar or a rhombus pillar having a predetermined inclination angle.

The first surface of the light reflection block is formed having an inclination angle of 45 degrees or 135 degrees.

The light reflection block is embedded in the case 110 with a predetermined distance from one end of the light transmission unit 120.

In this case, the light reflection block is formed in a second direction perpendicular to the first direction in which the first groove 112 is formed.

The through hole 116 is formed in the peripheral area of the case 110 in which the light reflection block is formed.

The through hole 116 penetrates the upper and lower surfaces of the case 110 and has a width larger than the diameter of the conductive ball. The through hole 116 guides the mounting position of the optical device.

The conductive ball 134 is inserted into the through hole 116.

The conductive ball 134 is connected to the metal terminal 132 formed in the optical device 130, the conductive ball 134 connected to the metal terminal 132 is inserted into the through hole 116 and then reflowed By performing the above, the optical device 130 can be easily attached onto the case 110. The conductive balls 134 may be solder balls, and may be replaced with metal balls other than the solder balls.

Accordingly, the case 110 is formed to a thickness satisfying 0.05 ~ 0.1mm, the first groove 112 has a depth of 0.028 ~ 0.075mm and a width of 0.1 ~ 0.12mm, the light reflection The first surface of the portion 114 (in the first embodiment, the light reflection block) is formed having an inclination angle of at least one of 45 ° and 135 °.

As described above, in the embodiment of the present invention, the light transmission unit 114 is embedded in the case 110, and thus the light transmission unit 120 is inserted into the first groove 112 formed in the case 110. By inserting the conductive ball 134 attached to the metal terminal 132 of the optical device 130 in the through hole 116 formed in the case 110, the optical connection module 100 is provided.

2 to 4 are diagrams illustrating a method of manufacturing the optical connection module 100 shown in FIG. 1 in order of process.

First, referring to FIG. 2, a light reflector 114 is embedded in an edge region, a through hole 116 is formed in a peripheral region of the light reflector 114, and a first groove 112 is formed in a central region. Prepare the case 110 is formed.

In this case, the case 110 is formed of a transparent liquid material having a specific refractive index, the reference of the refractive index is determined by the refractive index of the material forming the light transmission unit 120, more specifically, later It is preferable to be formed of a transparent liquid material (light transmissive material) having a refractive index lower than that of the inserted light transmitting unit 120.

In addition, the first groove formed in the case 110 may provide a seating space in which the light transmitting unit 120 may be mounted, and the case 110 may have a number corresponding to the number of the light transmitting units 120 inserted therein. It is formed in the central direction of the first direction.

In addition, the first groove 112 has a depth that satisfies the range 0.025mm ~ 0.075mm, and has a width that satisfies the range 0.1 ~ 0.12mm. In addition, the first groove 112 may have a U shape or a V shape according to the shape of the light transmitting part 120 so that the light transmitting part 120 may be easily mounted on the case 110. .

The light reflecting portion 114 embedded in the edge region of the case 110 is a light reflecting block having a first inclination angle with respect to the traveling path of the optical signal. The light reflection block is formed such that the first surface has a predetermined inclination angle by using a mold. In addition, a metal material is coated on the first surface, and the first surface becomes a metal reflective surface by the formed metal material to reflect the incident optical signal.

The light reflection block may be formed in various shapes according to the shape of the mold. For example, the first surface may have a shape such as a triangular pillar or a rhombus pillar having a predetermined inclination angle. At this time, the first surface of the light reflection block is formed having an inclination angle of any one of 45 degrees or 135.

The light reflection block is embedded in the case 110 at a predetermined distance from one end of the light transmission unit 120 and in a second direction perpendicular to the first direction in which the first groove 112 is formed. Is formed.

In addition, a through hole 116 is formed in a peripheral area of the case 110 in which the light reflection block is formed. The through hole 116 penetrates the upper and lower surfaces of the case 110 and has a width larger than the diameter of the conductive ball. The through hole 116 guides the mounting position of the optical device.

Next, referring to FIG. 3, the optical transmitter 120 is inserted into the first groove 112 formed in the case 110.

The inserted optical transmission unit 120 may be composed of an optical fiber (fiber) providing a transmission path of the optical signal, otherwise the core layer for transmitting the optical signal, and at least one clad around the core layer It may consist of an optical waveguide comprising a layer.

Next, referring to FIG. 4, the conductive ball 134 attached to the metal terminal 132 of the optical device 130 is inserted into the through hole 116 formed in the case 110, and then placed on the case 110. The optical device 130 is attached.

As described above, according to the first embodiment of the present invention, the light transmitting unit 120 is disposed in the case 110 in which the first groove 112 and the through hole 116 are formed, and the light reflecting unit 114 is embedded. The optical connection module 100 is provided by inserting the conductive ball 134 connected to the metal terminal 132 of the optical device 130 into the through hole 116.

The light reflecting unit 114 may be formed by the following method.

First, a master mold (not shown), which is the basis for manufacturing the light reflecting unit 114, is prepared. The master mold includes a plurality of grooves corresponding to the inclination angle of the light reflecting part 114.

Thereafter, a replica mold (not shown) is manufactured using the prepared master mold. The replica mold) may be manufactured by applying a liquid material into the prepared master mold, curing the applied liquid material, and then separating the master mold.

The manufactured replication mold has a plurality of grooves corresponding to the grooves of the master mold.

Then, the liquid material is applied in the replica mold thus prepared, and then UV and thermal curing processes are performed. When the applied liquid material is hardened to some extent, a thin film such as chromium or silver is formed on specific surfaces of the plurality of light reflecting parts 114 formed in the grooves of the replica mold by the hardening through sputtering. do.

Thereafter, each of the light reflection parts 114 on which the thin film of chromium or silver is formed is separated from the replica mold.

According to the first embodiment of the present invention as described above, by providing an optical connection module in which the light reflection block, the optical element and the optical transmission unit are integrated, it is possible to easily align the optical element and the optical transmission unit, By forming a through hole and forming a conductive ball in the formed through hole, it is possible to solve the distortion problem that occurs during the optical device mounting and reflow process.

5 is a view showing an optical connection module according to a second embodiment of the present invention.

Referring to FIG. 5, the optical connection module 200 forms an exterior, a case 210 in which a first groove 212, a second groove 214, and a through hole 216 are formed in a central area thereof, and the case It is inserted into the first groove 212 of the 210, and includes an optical transmission unit 120 for transmitting an optical signal, and an optical element 230 attached to the through hole 216 formed in the case 210. .

The case 210 forms an appearance of the optical connection module 210. The case 210 is formed of a transparent liquid material having a specific refractive index, and the reference of the refractive index is determined by the refractive index of the material forming the light transmitting unit 220.

That is, the case 210 is formed of a transparent liquid material having a refractive index lower than the refractive index of the light transmitting unit 220, which is preferably a light transmitting material capable of transmitting light.

The first groove 212 is formed in the central region of the case 210. The first groove 212 provides a seating space in which the light transmitting unit 220 may be seated. The first groove 212 may be formed as a single dog, or may be formed as a plurality of first grooves. The first groove 212 has a number corresponding to a transmission channel of the optical signal and is formed in the central region of the case 210.

In this case, the first groove 212 is formed in a first direction corresponding to the longitudinal direction of the case 210. The first groove 212 has a depth that satisfies the range 0.025mm ~ 0.075mm, and has a width that satisfies the range 0.1 ~ 0.12mm.

In addition, the first groove 212 may have a U shape or a V shape according to the shape of the light transmitting part 220 so that the light transmitting part 220 may be easily mounted on the case 210. .

The optical transmitter 220 is inserted into the first groove 212. The optical transmitter 220 provides a transmission path of the optical signal. To this end, the optical transmission unit 220 may be composed of an optical fiber (fiber). In addition, the optical transmission unit 220 may be composed of an optical waveguide including a core layer for transmitting an optical signal and at least one clad layer surrounding the core layer.

A light reflecting part is formed in an edge region of the case 210, which is implemented by a second groove 214 formed at an edge of the case 210.

That is, in the first embodiment, a separate light reflection block is embedded in the case 210. In the second embodiment, the second groove 214 is formed in the case 210 with a first inclined angle. The second groove 214 itself to perform the function for the light reflection.

The second groove 214 is formed in the edge region of the case 210, and the first surface has a predetermined inclination angle with respect to the traveling path of the optical signal. The second groove 214 is coated with a metal material on a first surface thereof, and the first surface becomes a metal reflective surface by the formed metal material to reflect the incident optical signal. In addition, the first surface of the second groove 214 is formed having an inclination angle of either 45 degrees or 135.

The second groove 214 is formed in a second direction perpendicular to the first direction in which the first groove 112 is formed at a predetermined distance from one end of the first groove 212.

A through hole 216 is formed in a peripheral area of the case 210 in which the light reflection block is formed.

The through hole 216 penetrates the upper and lower surfaces of the case 210 and has a width larger than the diameter of the conductive ball. The through hole 216 guides the mounting position of the optical device. The conductive ball 234 is inserted into the through hole 216.

The conductive ball 234 is connected to the metal terminal 232 formed in the optical device 230, the conductive ball 234 connected to the metal terminal 232 is inserted into the through hole 216 and then reflow process By performing the above, the optical device 230 can be easily attached onto the case 210.

In addition, the case 210 is formed to a thickness satisfying 0.05 ~ 0.1mm, the first groove 212 has a depth in the range of 0.028 ~ 0.075mm and a width in the range of 0.1 ~ 0.12mm, the second groove The first surface of 214 (in the first embodiment, the light reflection block) is formed having an inclination angle of at least one of 45 ° and 135 °.

As described above, in the embodiment of the present invention, the light transmitting unit 220 is inserted into the case 210 in which the first groove 212, the second groove 214, and the through hole 216 are formed, and the case 210. By inserting the conductive ball 234 attached to the metal terminal 232 of the optical device 230 in the through hole 216 formed in the), to provide an optical connection module 200.

6 to 8 are diagrams illustrating a method of manufacturing the optical connection module 200 shown in FIG. 5 in order of process.

First, referring to FIG. 6, a case 210 having a second groove 214 and a through hole 216 formed in an edge region and a first groove 212 formed in a central region is prepared.

In this case, the case 210 is formed of a transparent liquid material having a specific refractive index, the reference of the refractive index is determined by the refractive index of the material forming the light transmission unit 220, more specifically, later It is preferable that the transparent liquid material (light transmissive material) having a refractive index lower than the refractive index of the inserted light transmitting unit 220 is formed.

In addition, the first groove formed in the case 210 may provide a seating space in which the light transmitting unit 220 may be seated, and the case 210 may have a number corresponding to the number of light transmitting units 220 inserted therein. It is formed in the central region of the first direction corresponding to the longitudinal direction of the case 210.

In addition, the first groove 212 has a depth that satisfies the range 0.025mm ~ 0.075mm, and has a width that satisfies the range 0.1 ~ 0.12mm. In addition, the first groove 212 may have a U shape or a V shape according to the shape of the light transmitting part 220 so that the light transmitting part 220 may be easily mounted on the case 210. .

The second groove 214 formed in the edge region of the case 210 has a first inclined angle with respect to the traveling path of the optical signal. In addition, a metal material is coated on the first surface, and the first surface becomes a metal reflective surface by the formed metal material to reflect the incident optical signal. In addition, the first surface has an inclination angle of 45 degrees or 135 degrees.

The second groove 214 is buried in the case 210 with a predetermined distance from one end of the light transmitting unit 220, the second perpendicular to the first direction in which the first groove 212 is formed Is formed in the direction.

In addition, a through hole 216 is formed in a peripheral area of the case 210 in which the second groove 214 is formed. The through hole 216 penetrates the upper and lower surfaces of the case 210 and has a width larger than the diameter of the conductive ball. The through hole 216 guides the mounting position of the optical device.

Next, referring to FIG. 7, the optical transmitter 220 is inserted into the first groove 212 formed in the case 210.

The inserted optical transmission unit 220 may be composed of an optical fiber (fiber) providing a transmission path of the optical signal, alternatively a core layer for transmitting the optical signal, and at least one clad around the core layer It may consist of an optical waveguide comprising a layer.

Next, referring to FIG. 8, the conductive ball 134 attached to the metal terminal 232 of the optical device 230 is inserted into the through hole 216 formed in the case 210, and then placed on the case 210. The optical device 230 is attached.

As described above, according to the first embodiment of the present invention, the optical transmitter 220 is inserted into the case 210 in which the first groove 212, the second groove 214, and the through hole 216 are formed. The optical connection module 200 is provided by inserting a conductive ball 234 connected to the metal terminal 232 of the optical device 230 into the through hole 216.

According to the second embodiment of the present invention as described above, by providing an optical connection module in which the groove, the optical element, and the optical transmission unit for light reflection are integrated, the optical element and the optical transmission unit can be easily aligned, and the optical connection By forming a through hole in the module and forming a conductive ball in the formed through hole, a distortion problem occurring during the optical device mounting and reflow process can be solved.

9 is a cross-sectional view of an optical printed circuit board according to an exemplary embodiment of the present invention.

Referring to FIG. 9, the optical printed circuit board 300 may include a first insulating layer 310, a circuit pattern 320 formed on at least one surface of the first insulating layer 310, and the first insulating layer 310. The optical connection modules 100 and 200 formed on the formed circuit patterns 320 and the upper and lower portions of the first insulating layer 310 are formed, and the optical connection modules 100 and 200 and the circuit patterns 320 are buried. The second insulating layer 330 is included.

The first insulating layer 310 functions as a base member that provides durability to the optical printed circuit board.

The first insulating layer 310 may be a supporting substrate of an optical printed circuit board on which a single circuit pattern is formed, but an insulating layer region in which one circuit pattern 320 is formed among the optical printed circuit boards having a plurality of stacked structures. It may mean.

When each of the first insulating layers 310 means one insulating layer among a plurality of stacked structures, a plurality of circuit patterns may be continuously formed on or under the first insulating layer 310.

Conductive vias (not shown) may be formed in the first insulating layer 310 to electrically connect circuit patterns between different layers.

The circuit pattern 320 may be made of an electrically conductive metal such as gold, silver, nickel, copper, and the like for electric signal transmission, and is preferably formed using copper.

The circuit pattern 320 is a manufacturing process of a conventional printed circuit board (Additive process), a subtractive process (Subtractive Process), MSAP (Modified Semi Additive Process) and SAP (Semi Additive Process) method, etc. Possible details are omitted here.

The first insulating layer 310 may be a thermosetting or thermoplastic polymer substrate, a ceramic substrate, an organic-inorganic composite material substrate, or a glass fiber impregnated substrate, and includes a polymer resin, FR-4, BT (Bismaleimide Triazine), It may include an epoxy-based insulating resin such as Ajinomoto Build up Film (ABF), and may alternatively include a polyimide-based resin, but is not particularly limited thereto.

The optical connection modules 100 and 200 manufactured as described above are formed on the first insulating layer 310.

The optical devices included in the optical connection modules 100 and 200 are electrically connected to the circuit patterns 320 formed on the first insulating layer 310.

Optical devices included in the optical connection modules 100 and 200 include an optical transmitter (not shown) and an optical receiver (not shown).

The optical transmitter generates and outputs an optical signal, and includes a driver integrated circuit (not shown) and a light emitting device (not shown). The light emitting element is driven by the driver integrated circuit.

In this case, the light emitting device may include a vertical-cavity surface-emitting laser (VCSEL) that is a light source device that emits an optical signal. The VCSEL is a light source element that transmits or amplifies a light source signal in a manner of vertically irradiating a laser beam.

The optical receiver includes a receiver integrated circuit (not shown) and a light receiving element (not shown). The light receiving element receives light generated from the optical transmitter and is driven by the receiver integrated circuit. The light receiving element may include a photo detector (PD), which is an element for detecting an optical signal.

As described above, in the embodiment according to the present invention, to manufacture the optical connection module (100, 200) manufactured as described above, thereby inserting the optical connection module (100, 200) in the insulating layer to form an optical path As a result, an optical printed circuit board having high reliability and efficiency can be manufactured.

10 to 13 are cross-sectional views illustrating a method of manufacturing the optical printed circuit board shown in FIG. 9.

Referring to FIG. 10, first, the optical connection modules 100 and 200 are manufactured.

Subsequently, referring to FIG. 11, a first insulating layer 310 on which at least one circuit pattern 320 is formed is prepared.

In more detail, first, the first insulating layer 310 is prepared. In this case, when a conductive layer (not shown) is stacked on at least one surface of the first insulating layer 310, the laminated structure of the first insulating layer 310 and the conductive layer may be a conventional CCL (Copper Clad Laminate). have.

Alternatively, the conductive layer may be formed by electroless plating on the first insulating layer 310. When the conductive layer is formed by electroless plating, roughness may be provided to upper and lower surfaces of the first insulating layer 310 to smoothly perform plating. Thereafter, the conductive layer formed on at least one surface of the first insulating layer 310 is etched to form a circuit pattern 320.

The circuit pattern 320 may be formed through a dry film lamination, exposure, development, etching, and peeling process.

Next, referring to FIG. 12, the optical connection modules 100 and 200 are attached to the circuit pattern formed on the first insulating layer 310.

That is, the through holes 116 and 216 formed in the optical connection modules 100 and 200 are disposed on the circuit patterns 320 formed in the first insulating layer 310, and thus the through holes 116 and 216. Reflow the conductive balls 134 and 234 inserted therein so that the circuit pattern 320 and the optical devices 130 and 330 are electrically connected.

Next, referring to FIG. 13, the optical connection modules 100 and 200 are buried by stacking the second insulating layer 330 on the upper and lower portions of the first insulating layer 310.

As such, by inserting the optical connection modules 100 and 200 manufactured as described above into the insulating layer, the optical path can be easily formed, thereby increasing the productivity of the optical printed circuit board and providing optical It can increase the efficiency of the transmission.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100, 200: optical connection module
300: optical printed circuit board

Claims (27)

A case defining an appearance and having a first groove formed in a central area thereof;
An optical transmitter inserted into the first groove of the case and transmitting an optical signal; And
The optical connection module is formed in the edge region of the case, the first surface includes a light reflecting portion having a predetermined inclination angle with respect to the traveling path of the optical signal. The method of claim 1,
The first groove is formed in a first direction corresponding to the longitudinal direction of the case,
And the light reflecting unit is formed in a second direction perpendicular to the first direction. The method of claim 1,
The optical transmission module is an optical waveguide including an optical waveguide including a core layer for transmitting an optical fiber or an optical signal and at least one cladding layer surrounding the core layer. The method of claim 3,
The case is an optical connection module formed of a transparent liquid material having a lower refractive index than the core layer and the cladding layer. The method of claim 1,
The light-
It is embedded in the edge region of the case, the first surface is a light reflection block having an inclination angle with respect to the traveling path of the optical signal,
The optical connection module, the metal material is formed on the first surface of the light reflection block The method of claim 1,
The light-
A second groove formed in an edge region of the case;
And a metal material formed on the first surface of the second groove with an inclination angle with respect to the path of the optical signal. The method of claim 1,
Through-holes are formed in the edge region of the case formed with the light reflecting portion,
And a conductive ball inserted into the through-hole for connecting with the metal terminal of the optical device. The method of claim 1,
The case is formed to a thickness satisfying 0.05 ~ 0.1 mm,
And the first groove has a depth in the range of 0.028 to 0.075 mm and a width in the range of 0.1 to 0.12 mm. The method of claim 1,
And the first surface of the light reflecting unit has an inclination angle of at least one of 45 ° and 135 °. Insulating layer; And
It is embedded in the insulating layer, and includes an optical connection module for transmitting an optical signal,
The optical connection module,
A case defining an appearance and having a first groove formed in a central area thereof;
An optical transmitter inserted into the first groove of the case and transmitting an optical signal; And
An optical printed circuit board formed at an edge region of the case and having a first reflective surface having a predetermined inclination angle with respect to a traveling path of the optical signal. The method of claim 10,
The first groove formed in the case is formed in a first direction corresponding to the longitudinal direction of the case, the light reflecting portion is formed in a second direction perpendicular to the first direction. The method of claim 10,
The optical transmission part is an optical waveguide, or an optical waveguide including an optical waveguide including a core layer for transmitting an optical signal and at least one cladding layer surrounding the core layer. 13. The method of claim 12,
The case is an optical printed circuit board formed of a transparent liquid material having a lower refractive index than the core layer and cladding layer. The method of claim 10,
The light-
It is embedded in the edge region of the case, the first surface is a light reflection block having the inclination angle,
And a metal material formed on the first surface of the light reflection block. The method of claim 10,
The light-
A second groove formed in an edge region of the case;
The first surface of the second groove has an inclination angle with respect to the traveling path of the optical signal, the metal printed circuit board is formed. The method of claim 10,
An optical device is formed on the optical connection module on which the light reflection unit is formed.
An optical printed circuit board having a through hole for inserting a conductive ball connected to the metal terminal of the optical device in the edge region of the case. The method of claim 10,
The case is formed to a thickness satisfying 0.05 ~ 0.1 mm,
And the first groove has a depth in the range of 0.028 to 0.075 mm and a width in the range of 0.1 to 0.12 mm. The method of claim 10,
The first surface of the light reflecting portion has an inclination angle of at least one of 45 ° and 135 °. Preparing a case having an appearance and having a first groove formed in a central area thereof;
Inserting an optical transmitter for transmitting an optical signal into a first groove of the prepared case; And
And embedding the case into which the optical transmission unit is inserted into the insulating layer. 20. The method of claim 19,
Preparing the case,
Preparing a case in which a first reflective surface is filled with a light reflection block having a predetermined inclination angle with respect to a traveling path of the optical signal,
The light reflection block is a manufacturing method of an optical printed circuit board is formed in the edge region of the case. 20. The method of claim 19,
Preparing the case,
Preparing a case in which the second groove is formed in the edge region,
The first surface of the second groove has a predetermined angle of inclination with respect to the traveling path of the optical signal. The method according to any one of claims 20 and 21,
The first groove is formed in a first direction corresponding to the longitudinal direction of the case, the light reflection block or the second groove is formed in a second direction perpendicular to the first direction. The method according to any one of claims 20 and 21,
And a metal material for reflecting the optical signal on the first surface. 20. The method of claim 19,
Inserting the optical transmission unit,
Inserting an optical fiber into the first groove; or
And inserting an optical waveguide including a core layer for transmitting an optical signal to the first groove and at least one clad layer surrounding the core layer. 25. The method of claim 24,
Preparing the case,
Preparing a case formed of a transparent liquid material having a lower refractive index than the core layer and the cladding layer. 20. The method of claim 19,
Through-holes are formed in the edge region of the case,
And inserting the conductive ball connected to the metal terminal of the optical device in the through hole to attach the optical device to the case. 20. The method of claim 19,
The case is formed to a thickness satisfying 0.05 ~ 0.1 mm,
Wherein the first groove satisfies a depth in the range of 0.028 to 0.075 mm and a width in the range of 0.1 to 0.12 mm.

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