Composite metal column for mounting semiconductor device

Active solid-state devices (e.g. – transistors – solid-state diode – Combined with electrical contact or lead – Of specified material other than unalloyed aluminum

Reexamination Certificate

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Details

C257S587000, C257S778000

Reexamination Certificate

active

07550852

ABSTRACT:
An integrated circuit chip which has a plurality of pads and non-reflowable contact members to be connected by reflow attachment to external parts. Each of these contact members has a height-to-diameter ratio and uniform diameter favorable for absorbing strain under thermo-mechanical stress. The members have a solderable surface on each end and a layer of reflowable material on each end. Each member is solder-attached at one end to a chip contact pad, while the other end of each member is operable for reflow attachment to external parts.

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patent: 6730856 (2004-05-01), Furukuwa
patent: 2003/0038162 (2003-02-01), Chew et al.
patent: 2004/0087057 (2004-05-01), Wang et al.
patent: 0704895 (1996-04-01), None
patent: WO9719466 (1997-05-01), None

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