Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1979-06-20
1981-03-03
James, Andrew J.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
357 81, 357 66, 357 79, 174 16HS, 165 80C, H01L 2504, H01L 2302, H01L 2348
Patent
active
042544319
ABSTRACT:
An improved arrangement for cooling a module packaged semiconductor integrated circuit chip having heat generating microcircuits thereon is disclosed. Enhanced cooling over prior art techniques is achieved by utilizing an interfacial layer of liquid metal alloy coated metallic dendrites, which layer is sandwiched between two facing surfaces of the chip and a heat sink. Appropriate biasing means are also provided to urge the dendritic projections into piercing engagement with the liquid metal alloy layer, the biasing means being thermally coupled between the heat sink and the module container to thereby aid in forming unitary heat transfer path from the chip to the module container. The biasing means are adapted to provide sufficient force to cause the dendritic projections to engage and retain the liquid metal alloy layer and to non-destructively force the layer to fill all available space between the chip and the heat sink.
REFERENCES:
patent: 3226608 (1965-12-01), Coffin
patent: 3248615 (1966-04-01), Weisshaar
patent: 3271638 (1966-09-01), Murad
patent: 3328642 (1967-06-01), Haumesser et al.
patent: 4129881 (1978-12-01), Reichei et al.
IBM Technical Disclosure Bulletin, vol. 19, No. 5, Oct. 1976, Inner Fin Air Cooled Module by Cupta, p. 1804.
IBM Technical Disclosure Bulletin, vol. 20, No. 10, Mar. 1978; by Johnson, Device cooling, pp. 3919 & 3920.
IBM Technical Disclosure Bulletin, vol. 21, No. 1, Jun. 1978, by Blake, Packaging Structure, pp. 183 & 184.
IBM Technical Disclosure Bulletin, vol. 16, No. 3, Aug. 1973, by Van Vestrout; Floating Backbond Mounting for a Chip Device.
Babuka Robert
Heath Robert E.
Saxenmeyer Jr. George J.
Schultz Lewis K.
International Business Machines - Corporation
James Andrew J.
Seinberg Saul A.
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