Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-05-10
2005-05-10
Arbes, Carl J. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S825000, C029S846000, C029S847000, C427S097100, C427S097200, C428S209000, C430S313000, C430S314000
Reexamination Certificate
active
06889432
ABSTRACT:
A method for manufacturing a double-sided circuit board from a board material having a first electric conductor layer and a first electrically insulating layer, including the steps of: making conduction holes in the board material so as to penetrate only the first electrically insulating layer or both the first electrically insulating layer and the first electric conductor layer; forming an electrically conductive thin-film layer on a surface of the first electrically insulating layer and wall surfaces of the conduction holes; forming a second electrically insulating layer on the electrically conductive thin-film layer; forming a first electric conductor wiring by electroplating on predetermined portions of the electrically conductive thin-film layer; covering the first electric conductor wiring with a chemical-resistant film; forming a second electric conductor wiring by chemically dissolving a predetermined portion of another surface of the first electric conductor layer; and removing the second electrically insulating layer and the film.
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Naito Toshiki
Shinogi Yoshifumi
Uenda Daisuke
Arbes Carl J.
Nitto Denko Corporation
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