Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-01-12
2009-06-09
Arbes, C. J (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S825000, C029S830000, C029S846000, C029S879000, C228S179100, C438S066000
Reexamination Certificate
active
07543376
ABSTRACT:
Provided is an FPC, which comprises an insulating layer2, wiring layers3and4laminated above and under the insulating layer2, and a layer connection for connecting the wiring layers3and4electrically. The layer connection is constituted to comprise: a conductor press-fit hole5of a cone shape extending through the insulating layer2and the upper and lower wiring layers3and4and expanded to the side of one wiring layer3; and a conductor6filled and press-fitted without any clearance in the conductor press-fit hole such that it is jointed to the wiring upper layer3deformed into the cone shape of the conductor press-fit hole5, and is protruded from the other wiring lower layer4to have its surface partially coated and jointed. As a result, the contact area between the wiring layers3and4and the conductor6filled in the conductor press-fit hole5can be enlarged to retain the contact strength between the wiring layers3and4and the conductor6sufficiently thereby to provide a high connection reliability for the layer connection.
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Morimoto Shinji
Nakashima Kouji
Ogata Shigeki
Okamoto Katsuya
Yoshino Toyokazu
Arbes C. J
Greenblum & Bernstein P.L.C.
Panasonic Corporation
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