Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making electrical device
Patent
1987-09-08
1989-10-24
Dees, Jose G.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making electrical device
430319, 430325, 430328, 430330, 430394, 427 98, B05D 512, G03L 500
Patent
active
048761770
ABSTRACT:
A process for producing a printed circuit board, which comprises the steps of forming a layer comprising a photosensitive resin composition on an insulating substrate having on its surface an adhesive layer adherent to a metal being subsequently plated thereon; exposing said layer comprising a photosensitive resin composition to an actinic radiation in a manner so as to form on said layer a negative pattern of a conductor circuit pattern and to semicure said negative pattern to an extent sufficient to keep it from erosion by a plating solution; developing by dissolving away with a solvent the uncured areas not exposed to said actinic radiation, thereby to form a plating resist on the areas of said negative pattern; chemically plating said conductor circuit pattern areas not covered with said plating resist, thereby to form a conductor circuit; and carrying out a curing treatment to cure completely said resist. According to this invention, it is possible to provide a printed circuit board of higher reliability compared with conventional processes.
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Akahoshi Haruo
Kawamoto Mineo
Murakami Kanji
Tadokoro Akio
Yoshimura Toyofusa
Dees Jos,e G.
Hitachi , Ltd.
Loney Donald J.
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