Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1997-12-02
1999-05-04
Thompson, Gregory
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
174 163, 174 524, 174260, 257707, 257713, 257719, 257738, 257723, 361720, 361760, 361772, 361773, H05K 720, H05K 100
Patent
active
059010410
ABSTRACT:
A flexible integrated circuit package for mounting on a substrate is disclosed. The package consists of a tape film having layers of dielectric and conductive material, a semiconductor die and an array of conductive leads. A molded body covers the die, and absorbs the majority of the pressure applied when compressing the package between a heatsink and a printed circuit board (PCB). Rigid removable support material surrounds the molded body to keep the package flat while it is being mounted to the PCB. The support material is removed after soldering of the package to the PCB. The invention permits the package to be tightly compressed between a heatsink and a substrate without causing degradation of the conductive connections. Reliability of the connections is further increased since the tape film is flexible enough to accommodate bending of the substrate to which the package is connected.
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Dr. F.E. Andros, Dr. R.B. Hammer; "Area Array Tab Package Technology"; presented by IBM, pp. 1 to 8 No Known Date.
Davies Bill Tempest
Harris Mark Roy
Northern Telecom Limited
Thompson Gregory
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