Patent ID: 7354697
Filing Date: 2008-04-08
Classification: H05K,Y10S,Y10T

Abstract:
1. A process for producing a wiring circuit board, which comprises the sequential steps of: (A) forming a conductor layer of a predetermined pattern on a long sheet insulating layer; (B) applying a photosensitive solder resist solution to form a photosensitive solder resist layer on the insulating layer and the patterned conductor layer formed on the insulating layer; (C) disposing a long sheet transparent protective film in a sheet form on the photosensitive solder resist layer; (D) exposing the photosensitive solder resist layer to a light through the transparent protective film; (E) winding a long sheet-shaped multilayered structure comprising the insulating layer, the conductor layer, the photosensitive or exposed solder resist layer and the transparent protective film, into a roll.