Good day, dear colleagues.
I have an interesing question for PVD technology specialists.
We use an equipment (Picture 1) for Arc-PVD technology with titanium cathode (picture 3) for glass surface coating (Picture 4).
But we faced with problem of nonequal coating thickness on the surface. In the central part of surface (under cathode placed) the thicknes is OK. On the corner parts the coating thickness is low (Picture 2).
What is the reason of this not uniform thickness?
Is it possible to create aproximately similar coating thickness on the all surface zones? Do You know any technical methods to rich this goal?
Hello Dmitry,
If possible, use a rotating sample.
In your case, the thickness reduces quadratically with the distance to the cathode.
Yours
R. Mitdank
Great thanks for answer Dr Mitdank!
Mechnical moving of sample is a good point for this goal.
I had imagined that some reflective or precipitator/sprayer method are exist. I mean that some physical plate would reflective particles of titanium in the environment to glass surface.
Or is it too fantastic?
Will cathode shifting to little bit up (relatively itself central line) help us to creat uniform coating on the surface?
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