Arc-coating process with rotating cathodes
A method is provided for coating objects in a vacuum chamber in which a physical vapor deposition (PVD) can be carried out. The chamber has at least one anode means, at least one cathode and at least one magnetic field source. An arc can be ignited between the at least one anode means and the at least one cathode, and the cathode separates material. The at least one magnetic field can be turned relative to the at least one cathode and the objects to be coated are arranged in the chamber. The magnetic field is turned before the beginning of the coating process so that the separated material does not coat the objects to be coated in the coating process. The arc for the physical deposition process is produced by means of at least two cathodes, said cathodes are constructed as substantially cylindrical tubular cathodes and the at least one magnetic field source is constructed as a permanent or coil magnet arranged in the tubular cathodes and the tubular-cathodes turn about their cylinder axis during the coating process.
1. A method for coating objects
in a vacuum chamber in which a physical vapour deposition (PVD) can be carried out, wherein
the chamber comprises at least one anode means, at least one cathode and at least one magnetic field source, wherein an arc can be ignited between the at least one anode means and the at least one cathode, and wherein said cathode separates material,
the at least one magnetic field can be turned relative to the at least one cathode and
the objects to be coated arc arranged in the chamber,
further comprising the step of the magnetic field being turned before the beginning of the coating process so that the separated material does not coat the objects to be coated in the coating process,
wherein the arc for the physical deposition process is produced by means of at least two cathodes, said cathodes are constructed as substantially cylindrical tubular cathodes and the at least one magnetic field source is constructed as a permanent or coil magnet arranged in the tubular cathodes and wherein said tubular-cathodes turn about their cylinder axis during the coating process.
2. The method according to claim 1 , wherein said anode means is realized by the housing of said chamber.
3. The method according to claim 1 , wherein the arc for the physical deposition process is driven between the chamber wall as the anode means and at least one of said cathodes.
4. The method according to claim 1 , wherein the arc for the physical deposition process is driven between a rod or plate anode arranged in the chamber as the anode means and the at least one of said cathodes.
5. The method according to claim 1 , wherein the magnetic field source is turned before the beginning of the coating process such that the separated particles impact on a chamber wall facing away from the objects to be coated.
6. The method according to claim 1 , wherein the direction of deposition before the beginning of the coating process is turned by approximately 150° to 180° relative to the direction of the objects to be coated.
7. The method according to claim 6 , wherein the direction of deposition before the beginning of the coating process is turned by approximately 180° relative to the direction of the objects to be coated.
8. The method according to claim 1 , wherein the method comprises steps for successively carrying out the coating in relation to the height, where the magnetic field source is moved upwards and downwards and the magnetic field source is turned relative to the cathode during the upward and downward movement and the coating rate is thus changed with respect to height.
9. The method according to claim 8 , wherein in the upper region and in the lower region of the deposition process the magnetic field source takes on a direction in which the coating rate is greater than in the central region.
10. The method according to claim 9 , wherein in the central region the magnetic field source is turned outwards by approximately 45° from the direction between the cathode and the object to be coated.
11. A method for coating objects
in a vacuum chamber in which a physical vapour deposition (PVD) can be carried out, wherein
the chamber comprises at least one anode means, at least one cathode and at least one magnetic field source, wherein an arc can be ignited between the at least one anode means and the at least one cathode, and wherein said cathode separates material,
the at least one magnetic field can be turned relative to the at least one cathode and
the objects to be coated are arranged in the chamber,
further comprising the step of the magnetic field being turned before the beginning of the coating process so that the separated material does not coat the objects to be coated in the coating process,
wherein the direction of deposition before the beginning of the coating process is turned by approximately 150° to 180° relative to the direction of the objects to be coated.
12. The method according to claim 11 , wherein said anode means is realized by the housing of said chamber.
13. The method according to claim 11 , wherein the arc for the physical deposition process is driven between the chamber wall as the anode means and at least one cathode.
14. The method according to claim 11 , wherein the arc for the physical deposition process is driven between a rod or plate anode arranged in the chamber as the anode means and the at least one cathode.
15. A method for coating objects
in a vacuum chamber in which a physical vapour deposition (PVD) can be carried out, wherein
the chamber comprises at least one anode means, at least one cathode and at least one magnetic field source, wherein an arc can be ignited between the at least one anode means and the at least one cathode, and wherein said cathode separates material,
the at least one magnetic field can be turned relative to the at least one cathode and
the objects to be coated are arranged in the chamber,
further comprising the step of the magnetic field being turned before the beginning of the coating process so that the separated material does not coat the objects to be coated in the coating process,
wherein the method comprises steps for successively carrying out the coating in relation to the height, where the magnetic field source is moved upwards and downwards and the magnetic field source is turned relative to the cathode during the upward and downward movement and the coating rate is thus changed with respect to height, and
wherein in the upper region and in the lower region of the deposition process the magnetic field source takes on a direction in which the coating rate is greater than in the central region.
16. The method according to claim 15 , wherein said anode means is realized by the housing of said chamber.
17. The method according to claim 15 , wherein the arc for the physical deposition process is driven between the chamber wall as the anode means and at least one cathode.
18. The method according to claim 15 , wherein the arc for the physical deposition process is driven between a rod or plate anode arranged in the chamber as the anode means and the at least one cathode.
19. The method according to claim 15 , wherein the direction of deposition before the beginning of the coating process is turned by approximately 150° to 180° relative to the direction of the objects to be coated.
20. The method according to claim 15 , wherein in the central region the magnetic field source is turned outwards by approximately 45° from the direction between the cathode and the object to be coated.
21. The method according to claim 15 , wherein the direction of deposition before the beginning of the coating process is turned by approximately 180° relative to the direction of the objects to be coated.