Metal working – Method of mechanical manufacture – Electrical device making
Patent
1991-05-30
1993-04-20
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
29832, 29841, 228 51, 361398, H01R 906
Patent
active
052030784
ABSTRACT:
This invention relates to a printed wiring board (10) for IC cards to be built in or fitted to a contact type IC card, that is, an IC card having external contact terminals. The present invention is to provide a printed wiring board (10) for IC cards wherein bumps (20) are formed in a part of a conductor circuit (13) of this printed wiring board (10) for IC cards and are made external contact terminals, futhermore wherein only the contact surfaces of the external contact terminals are exposed on the surface of the IC card (30) and the surfaces of the external contact terminals and the surface of an over sheet (14) are made to be on the same plane level, so that, in case the IC card (30) is bent, an IC module (12) may be perfectly prevented from springing out and further the electric contact reliability of the external contact terminal may be also high.
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Hiroi Atsushi
Nakanishi Chiaki
Yanagawa Yoji
Arbes Carl J.
Ibiden Co. Ltd.
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