Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1997-04-11
1998-07-21
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
361777, 174255, 174260, 29743, H05K 330
Patent
active
057842582
ABSTRACT:
A printed wiring board includes features which allow the board to be held firmly in place by a vacuum mounting device so that semiconductor chips can be placed thereon, and wire bonds established between the semiconductor chips and the circuitry on the board. The side of the board opposite the side having the semiconductor chips defines a ridge which encloses a portion of the surface area thereof. The ridge forms a gasket around a vacuum slot on the vacuum mounting device. The ridge also provides a firm surface for wirebonds to be ultrasonically welded to landings on the board.
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Hutter R.
Picard Leo P.
Vigushin John B.
Xerox Corporation
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