Okay, let's clear things up a bit, because I have the feeling terms get mixed up at this point:
Cvd is a chemical process, which is not involved here at all, so let's forget about it.
PVD stands for physical vapor deposition and you need the following stuff:
You have a substrate (i.e. platinum), an object you want to coat (i.e. bezel), a vacuum chamber, a magnetron and a device to ignite the plasma.
How does it work?
In order to release platinum particles (molecule or atom sized) we subject it to a plasma in a noble gas low pressure chamber and an electromagnetic beam.
We now have platinum particles "floating around" ready to bond to virtually anything on the atomic level.
To make this process more efficient we electrically charge our bezel or put something charged behind it so the platinum particles fly in its' direction.
Once the particles hit our bezel they bond to it very, very strong.
This process is also called sputtering, but there are many different ways to do it in detail.
DLC is a different thing. DLC means that you coat something with a carbon layer (i.e. via pvd as described) which forms a thin, black layer of high hardness and superb wear resistance.