Coating processes – Electrical product produced – Integrated circuit – printed circuit – or circuit board
Patent
1985-10-10
1987-04-21
Smith, John D.
Coating processes
Electrical product produced
Integrated circuit, printed circuit, or circuit board
427 36, 427 451, 427 531, 427 98, 427 92, 427 97, C23C 1816
Patent
active
046595872
ABSTRACT:
In a selective electroless plating process suitable for formation and correction of a minute pattern by plating film, irradiation of the surface of a workpiece with a laser beam serves to selectively activate the surface of the workpiece to allow an electroless plating film to deposited on only the activated portions. The portion of the workpiece where plating is effected is irradiated with a radiation energy beam to form a damaged portion, which is contact with a plating bath during and/or after the irradiation to selectively from a plating film on the damaged portion. The portion of a workpiece where a pole as the connector part of a multilayer wiring board is to be formed is irradiated with a laser beam and allowed to have a pole selectively formed only thereon.
REFERENCES:
patent: 4239789 (1980-12-01), Blum
patent: 4511595 (1985-04-01), Inoue
patent: 4517254 (1985-05-01), Grapentin
patent: 4526807 (1985-07-01), Auerbach
Hanazono Masanobu
Imura Midori
Kazui Shinichi
Miura Youzi
Morijiri Makoto
Hitachi , Ltd.
Smith John D.
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