Metal working – Method of mechanical manufacture – Electrical device making
Patent
1994-10-28
1996-09-03
Hughes, S. Thomas
Metal working
Method of mechanical manufacture
Electrical device making
29423, 22818022, H05K 300
Patent
active
055511481
ABSTRACT:
A flexible film-like member having conductive metals filled in tapered holes extending through the thickness is positioned such that the holes of the member face to respective pad patterns on a circuit board on which bumps are to be formed, the conductive metals are then heated and fused so that they are joined and transferred to the pad patterns on the circuit board, and the film-like member is then removed by heating or cleaning liquid.
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Fukasawa Hideyuki
Kazui Shinichi
Matsuoka Makoto
Sasaki Hideaki
Shirai Mitsugu
Hitachi , Ltd.
Hughes S. Thomas
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