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Old 30th Jun 2017, 8:20 pm   #2
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 10,515
Default Re: UV Dry Film PCB technique - experiences to daet.

I worked at a place with a PCB shop. Dry film resist was used. The area working with it had yellow lights and filtered windows from the adjacent areas with plain fluorescent lights.

Air was clean-room filtered and the film was applied with a very high pressure on the roller.

Artwork was photo-reduced from 2:1 tapemasters onto very high density monochrome emulsion film.

David
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