WO2006131128A1 - Sputter-magnetron - Google Patents
Sputter-magnetron Download PDFInfo
- Publication number
- WO2006131128A1 WO2006131128A1 PCT/EP2005/006032 EP2005006032W WO2006131128A1 WO 2006131128 A1 WO2006131128 A1 WO 2006131128A1 EP 2005006032 W EP2005006032 W EP 2005006032W WO 2006131128 A1 WO2006131128 A1 WO 2006131128A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- target
- magnet
- magnetic pole
- shaped
- sputtering
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/34—Gas-filled discharge tubes operating with cathodic sputtering
- H01J37/3402—Gas-filled discharge tubes operating with cathodic sputtering using supplementary magnetic fields
- H01J37/3405—Magnetron sputtering
- H01J37/3408—Planar magnetron sputtering
Definitions
- the invention relates to a sputter magnetron according to the preamble of patent claim 1.
- CD discs can be provided with a protective layer or watch cases with a ceramic layer.
- coating glass with layers that transmit or reflect only certain wavelengths of light has become very important.
- architectural glass which is provided with thin layers, large glass facades are erected on buildings.
- the coating can also serve to make plastic films or plastic bottles gas-tight.
- the sputtering or sputtering method is very often used.
- sputtering is in an evacuated
- a plasma is understood to mean a mixture of positive and negative charge carriers in relatively high density and of neutral particles as well as
- sputtering This particle knockout is called "sputtering," which differentiates between reactive and non-reactive sputtering
- Sputtering is done with noble gases that serve as working gas, with their positive gas ions hitting particles from the target.
- reactive sputtering is additionally with reactive gases, eg. As oxygen, worked before its precipitation on a
- Substrate with the particles of the target form a compound.
- the ions required for the sputtering process are generated by collisions of gas atoms and electrons, for example in a glow discharge, and accelerated by means of an electric field into the target forming the cathode.
- Ionization is primarily responsible for the free electrons. These can be compressed by means of magnets in front of a target and thus intensify the ionization. The combination of cathode and magnet is called magnetron.
- Pollinia of the magnetic fields no removal of the target material instead.
- these are denotes those regions in which the magnetic field lines pierce the sputter-side target surface vertically.
- a magnetron is already known in which a magnet system moves parallel to the target material (EP 1 120 811 A2).
- the magnet system is a plurality of magnets that move on a path relative to and parallel to the target surface.
- the magnetic field becomes more homogeneous, and a uniform removal of the target material is ensured.
- High target utilization can also be achieved by using a tubular target. In this target is a magnet system that moves relative to the target, or the magnet system is stationary, while the tubular target moves around the magnet system (DE 41 17 367 C2).
- planar magnetron comprising a plurality of magnets defining a magnetic field in the form of a closed loop to produce a plasma tube over a target
- devices are provided which bring about a cyclical movement between the magnet and the surface of the target. One of these movements is circular.
- the object of the invention is to improve the utilization of a planar and rectangular target in the sputtering process.
- the invention thus relates to a magnetron with a planar target and a planar magnet system.
- the planar magnet system has a rod-shaped first magnetic pole with enlarged ends and a frame-shaped second magnetic pole, relative movement between the magnetic poles and the target being such that each point of the stationary magnet moving magnet system moves in a circular path. If the magnet system is stationary, each point of the target moves on such a circular path. During the relative movement to each other, the magnet system and the target are in parallel planes.
- the diameter of the circular path corresponds to the mean distance between two parallel arms of a plasma hose, which forms in sputtering operation between the first and the second magnetic pole.
- the advantage achieved with the invention is, in particular, that the target is also sputtered at those points where the magnetic field lines pass vertically through the target in static operation. In particular, the increased removal rates occurring on a narrow side of a rectangular target are avoided.
- FIG. 1 shows a magnet arrangement with inner and outer magnet and a plasma tube
- FIG. 2 shows a magnet arrangement which can be moved over a target
- Fig. 3 is a magnet assembly with plasma tube, in which the inner magnet is widened at its end;
- FIG. 5 shows a magnet arrangement with widened ends of the inner magnet, the broadening being realized by magnets arranged in parallel;
- FIG. 6 shows a magnet arrangement with widened ends of the inner magnet, the broadening being realized by ring magnets;
- Figure 7 shows a magnet arrangement with widened ends of the inner magnet, wherein the broadening is realized by circular disks.
- 8 shows a drive for driving the magnet arrangement relative to a target.
- a magnet assembly 1 is shown, as it is used in the sputtering of planar targets.
- a magnet arrangement is shown, for example, in FIG. 10 of US Pat. No. 5,382,344.
- the magnet arrangement 1 consists of a first magnetic pole, for example a north pole 2 and a second magnetic pole, for example a south pole 3.
- the north pole 2 has the shape of a rectangular frame which surrounds the pole-shaped south pole 3.
- the north pole 2 consists of two long sides 4, 5 and two short sides 6, 7.
- the south pole 3 also has two long sides 8, 9 and two short sides 10, 11, the short sides 10, 11, however, much shorter than the short sides 6, 7 of the North Pole 2.
- a plasma tube 12 can be seen, which occupies almost the entire space between the north pole 2 and south pole 3.
- This plasma tube 12 is formed by the magnetic field of the magnet assembly 1 in conjunction with a voltage which is applied to a cathode, not shown in Fig. 1, wherein these Cathode with the magnet assembly 1 is in communication.
- North Pole 2 and South Pole 3 are coupled together via a yoke.
- the target also not shown in FIG. 1, is at least as large as the magnet arrangement 1 and is arranged parallel thereto. Magnet assembly 1 and target are thus in parallel planes.
- the plasma tube 12 can be divided into four areas. Two regions 13, 14 run parallel to the long sides 4, 5 of the north pole 2, while two other regions 15, 16 surround the ends of the south pole 3 in a semi-elliptical manner.
- D denotes the distance between the center lines of the parallel regions 13, 14 of the plasma tube 12.
- magnet arrangement 1 is used in a magnetron, then in static operation essentially those parts of the target are sputtered which lie directly opposite the plasma tube 12. The remaining areas are essentially not removed.
- 2 shows an inventive arrangement of the magnet assembly 1 relative to a target 20.
- This target 20 is rectangular and slightly larger in dimensions than the magnet assembly 1.
- North Pole 2 and south pole 3 are connected via a yoke plate, not shown, so that the relative Location of the South Pole 3 to the North Pole 2 is always the same.
- an imaginary axis 21 is rotated by the south pole north pole arrangement on a circle 22 with the diameter D.
- the magnet system 1 is thus moved in such a way that each of its points describes a circle with the same diameter D.
- the magnet system 1 and the target 20 are located in planes that are aligned parallel to each other.
- a plasma is ignited.
- the plasma tube 12 thus also covers areas of the target 20 which would not be sputtered in static operation. To avoid re-deposition of the ablated target material on the target surface, any location on the surface of the target 20 should be covered by the plasma tube 12 for a period of time.
- the magnet arrangement 1 shown in FIGS. 1 and 2 still has the disadvantage that there is an increased material removal in the curved area 23, 24 of the magnet system 1. This results in the target 20 in this curve portion 23, 24 a hole.
- the inner magnetic pole is modified in the manner shown in FIG.
- the outer magnet 2 as well as the outer magnet of FIG. 1 is constructed.
- the inner magnet 26 has a different shape. Although he also has a rod with two long sides 27, 28 and two short sides 24, 30, but the long sides 27, 28 are shorter than the inner magnet 3 of FIG. 1st
- Each of the short sides 24, 30 is followed by five small bar magnets 31 to 35 and 36 to 40, which together form a substantially circular body, so that the inner magnetic pole has approximately the shape of a bone.
- the small bar magnets 31, 35 and 36, 40 provide a connection between the bar magnets 32, 34 and 37, 39 and the short sides 24, 30 of the inner magnetic pole 26 forth. They are approximately at an angle of 45 degrees relative to
- FIG. 4 serves to explain how the amount of material removed by a target 20 can be determined with a circular movement of the magnet arrangement 25 over the target 20 at a specific point 42, 43, 44 of the target.
- the plasma density is mathematically integrated along a circular path 46 with the diameter D (compare Shunji Ido, Koji Nakamura: Computational Studies on the Shape and Control of Plasmas in Magnetron Sputtering Systems, Jpn. J. Appl. Phys. 5702, 1993). It is thus formed a closed integral.
- this integration gives the value zero, because there is no plasma within the circular path 46.
- a certain positive value results for the plasma density, because there the plasma tube 45 penetrates into the circular path 47.
- the circular path 48 results again, as in the circular path 46, the value zero.
- the constriction should be so great that the plasma tube 45 is guided on the circular path 46 around the curve, wherein the inside of the plasma tube 45 describes a circular path with the diameter D, which corresponds to the distance D shown in FIG.
- Such a constriction can be achieved by a very wide magnet or by several juxtaposed narrow magnets.
- the respective central magnet 55 or 60 is in this case the largest, while the laterally succeeding magnets 54, 53; 56, 57 and 58, 59, respectively; 61, 62 become shorter and shorter towards the outside.
- FIG. 6 shows a further variant of the inner magnetic pole 26 in the case of a magnet arrangement 41.
- a magnetic ring 70, 71 adjoins each of the ends 29, 30 of the rod 26 in each case.
- FIG. 8 again shows the magnet arrangement according to FIG. 6 together with a target 20 and a schematic drive.
- a yoke plate 75 which lies over the two magnetic poles 26, 2.
- Denoted by 76 is a drive pulley, on the circumference of which a pin 77 is arranged, pointing downwards and communicating with the yoke plate 75.
- the drive plate 76 is connected to an upwardly directed shaft 78, which is driven by a motor 79.
- the yoke plate 75 moves with the magnet system in the manner already described, ie, so that each point of the yoke and the Magnet system moves on a circular path.
- the pin 77 is in this case not rigidly connected to the yoke plate 75, but in a hole of this yoke plate 75th where it can rotate, thus preventing the yoke plate 75 from rotating as a whole about the shaft 78.
- the geometric orientation (x, y axis) of the short and long sides of the yoke plate 75 remains unchanged during the rotational movement.
- the pin 77 need not protrude into an opening in the yoke plate 75 itself.
- An additional plate connected to the yoke plate 75 may also be provided for this purpose.
- Any other drive which effects the desired movement of the magnet arrangement relative to the target can also be used (compare EP 0 918 351 A1, FIG. It is only important that each point on the magnet assembly describes a movement on a circumference of diameter D.
- the magnets which form the ends of the rod-shaped inner magnetic pole 26 are preferably formed so that their magnetic field lines form an angle relative to the surface of the target 20 which is greater than 20 degrees.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physical Vapour Deposition (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008513937A JP2008542535A (ja) | 2005-06-04 | 2005-06-04 | スパッタ用マグネトロン |
EP05747554A EP1889280A1 (de) | 2005-06-04 | 2005-06-04 | Sputter-magnetron |
CNA2005800498463A CN101203935A (zh) | 2005-06-04 | 2005-06-04 | 溅射磁控管 |
PCT/EP2005/006032 WO2006131128A1 (de) | 2005-06-04 | 2005-06-04 | Sputter-magnetron |
US11/914,935 US20080190765A1 (en) | 2005-06-04 | 2005-06-04 | Sputtering Magnetron |
TW094122126A TWI315749B (en) | 2005-06-04 | 2005-06-30 | Sputter magnetron |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2005/006032 WO2006131128A1 (de) | 2005-06-04 | 2005-06-04 | Sputter-magnetron |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006131128A1 true WO2006131128A1 (de) | 2006-12-14 |
Family
ID=35517984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/006032 WO2006131128A1 (de) | 2005-06-04 | 2005-06-04 | Sputter-magnetron |
Country Status (6)
Country | Link |
---|---|
US (1) | US20080190765A1 (de) |
EP (1) | EP1889280A1 (de) |
JP (1) | JP2008542535A (de) |
CN (1) | CN101203935A (de) |
TW (1) | TWI315749B (de) |
WO (1) | WO2006131128A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11646140B2 (en) | 2020-11-12 | 2023-05-09 | Samsung Display Co., Ltd. | Magnet module and sputtering apparatus including the same |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9281167B2 (en) * | 2013-02-26 | 2016-03-08 | Applied Materials, Inc. | Variable radius dual magnetron |
US11594402B2 (en) | 2017-12-05 | 2023-02-28 | Oerlikon Surface Solutions Ag, Pfaffikon | Magnetron sputtering source and coating system arrangement |
CN110643966A (zh) * | 2019-11-14 | 2020-01-03 | 谢斌 | 一种提高磁控溅射靶材利用率的装置及方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5026471A (en) * | 1989-09-07 | 1991-06-25 | Leybold Aktiengesellschaft | Device for coating a substrate |
US5262028A (en) * | 1992-06-01 | 1993-11-16 | Sierra Applied Sciences, Inc. | Planar magnetron sputtering magnet assembly |
US5415754A (en) * | 1993-10-22 | 1995-05-16 | Sierra Applied Sciences, Inc. | Method and apparatus for sputtering magnetic target materials |
EP0918351A1 (de) * | 1997-11-19 | 1999-05-26 | Sinvaco N.V. | Flaches magnetron mit bewegbarer Magnetsanlage |
US6258217B1 (en) * | 1999-09-29 | 2001-07-10 | Plasma-Therm, Inc. | Rotating magnet array and sputter source |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01152272A (ja) * | 1987-12-09 | 1989-06-14 | Tokyo Electron Ltd | スパッタリング装置 |
JP2001207258A (ja) * | 2000-01-25 | 2001-07-31 | Asahi Glass Co Ltd | 回転磁石およびインライン型スパッタリング装置 |
-
2005
- 2005-06-04 US US11/914,935 patent/US20080190765A1/en not_active Abandoned
- 2005-06-04 CN CNA2005800498463A patent/CN101203935A/zh active Pending
- 2005-06-04 JP JP2008513937A patent/JP2008542535A/ja active Pending
- 2005-06-04 WO PCT/EP2005/006032 patent/WO2006131128A1/de active Application Filing
- 2005-06-04 EP EP05747554A patent/EP1889280A1/de not_active Withdrawn
- 2005-06-30 TW TW094122126A patent/TWI315749B/zh not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5026471A (en) * | 1989-09-07 | 1991-06-25 | Leybold Aktiengesellschaft | Device for coating a substrate |
US5262028A (en) * | 1992-06-01 | 1993-11-16 | Sierra Applied Sciences, Inc. | Planar magnetron sputtering magnet assembly |
US5415754A (en) * | 1993-10-22 | 1995-05-16 | Sierra Applied Sciences, Inc. | Method and apparatus for sputtering magnetic target materials |
EP0918351A1 (de) * | 1997-11-19 | 1999-05-26 | Sinvaco N.V. | Flaches magnetron mit bewegbarer Magnetsanlage |
US6258217B1 (en) * | 1999-09-29 | 2001-07-10 | Plasma-Therm, Inc. | Rotating magnet array and sputter source |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11646140B2 (en) | 2020-11-12 | 2023-05-09 | Samsung Display Co., Ltd. | Magnet module and sputtering apparatus including the same |
Also Published As
Publication number | Publication date |
---|---|
JP2008542535A (ja) | 2008-11-27 |
TWI315749B (en) | 2009-10-11 |
US20080190765A1 (en) | 2008-08-14 |
TW200643203A (en) | 2006-12-16 |
EP1889280A1 (de) | 2008-02-20 |
CN101203935A (zh) | 2008-06-18 |
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