Patent ID: 9536714
Date: 2017-01-03
CPC Classifications: C23C,H01J

Claim:
1. A coating source as a material supply for a PVD coating, comprising: a) a plate supported in a holder, the plate having a plate front, a plate back, and a centering device; the holder having a frame-shaped target mount for accommodating the plate while the plate is a target; the plate front is provided for converting coating material from a surface into a gas phase during a PVD process and the centering device assures centering of the plate at different plate temperatures; and b) a cooling device, which is provided on a back of the plate and is equipped with a cooling conduit and a closed cooling plate that is embodied in the form of a movable diaphragm; in order to ensure a thermal contact between the back of the plate and the diaphragm, a self-adhesive graphite film is glued to the back of the plate, wherein elements of a bayonet fitting are provided on the holder and the cooling device so that the holder with the centered plate can be affixed to the cooling device by the bayonet fitting, and wherein in order to hold the target at least three guide protrusions and/or grooves spaced apart from another are provided in the target and the target mount so that the guide protrusions of the target and/or the target mount are held in the corresponding grooves of the target mount and/or the target when the target is attached to the target mount; and the sets of guide protrusions and grooves are distributed so that in each guide protrusion and groove set a position of a center of a width of the groove coincides with a position of a center of a width of a corresponding guide protrusion and this position is selected so that at room temperature the position is situated in an axial direction from the target center, which remains unchanged in the same axial direction from the target center after a thermal expansion of the target and/or the target mount at an increased temperature; and wherein a material of the plate has a first thermal expansion coefficient α