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Specialty Chemistry Forums => Materials and Nanochemistry forum => Topic started by: Google01 on March 20, 2009, 07:40:28 AM

Title: vacuum evaporator
Post by: Google01 on March 20, 2009, 07:40:28 AM

what is vacuum vaporator and whats the difference between cvd and pvd?

Title: Re: vacuum evaporator
Post by: P on March 20, 2009, 08:26:41 AM

Hmm.   A vacuum evaporator uses a vacuum to lower the boiling point of a liquid so you can evaporate it off at a lower temperature.  Vapour Deposition is something else. This coats a substarate with a chemical in layers, molecule by molecule by sputtering molecules of said chemical onto the surface through a vacuum.  I think you mean the latter.  Have a look at these:





CVD: http://en.wikipedia.org/wiki/Chemical_vapor_deposition
PVD: http://en.wikipedia.org/wiki/Physical_vapor_deposition