Hitachi, Ltd.

Minoru Kanechiku

Haruo Akahoshi

Motoyo Wajima

Mineo Kawamoto

Kanji Murakami

Toyofusa Yoshimura

Yoichi Matsuda

Makoto Matsunaga

Kyoji Kawakubo

This invention concerns a method for the manufacture of a printed wiring board which particularly proves useful as a printed coil. This method is characterized by the fact that in the work in process which has undergone the step for formation of a conductor circuit and which has not undergone the step for separation of a plating resist, the plating resist and other insulating substratal material are separated for transfer from the surface of the substrate having the conductor circuit formed thereon. Since this method permits formation of an extremely thin insulating layer and a conductor circuit layer thicker than the insulating layer, it enables production of very thin printed wiring board and printed coil having high circuit density in the surfaces of component layers as well as in the direction of superposition of component layers.

Method for manufacture of printed wiring board

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Katsuta, Japan

Minoru Kanechiku