Description:
Dry Film is a photo-resist (photosensitive film). when strong UV light hits it, it hardens and this hardened form resists etching solutions. The film is comprised of three parts; the blue layer is in the middle, this is the polymer which hardens with UV, on each side of this polymer is a protective transparent film.
In very brief summary, one protective layer (the inside of the curl generally) is removed, the now uncovered polymer side is attached to the PCB, the PCB is exposed to UV through a 'mask' which has transparent traces to allow UV to harden the traces image, the remaining protective layer is removed and the PCB is developed in a solution of washing soda (Sodium Carbonate), then the PCB is etched.
Application:
PCB
Features:
Thickness: 38um
Width: 30cm
Length: 2m
Suitable for plating, hole covering, and the etching process.
Excellent Adhesion