What is the difference between ultra-high vacuum chamber and edwards vacuum coating unit if we are using the the technique of thermal evaporation ?

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Gourab Das

UHP range is ~10^-9 torr. It is not clear from your query that what vacuum range your Edwards vacuum coater can reach. PVD system with lower vacuum range is always preferable for contaminant free deposition.

Mukut Senapati

You have to provide more specification. Two motors are used in such equipment one for roughing vacuum and another for backing vacuum..

Isuru Lakmal

I agreed with Thomas Breuer

1st is a technical term and 2nd is a brand name.