Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1979-02-27
1981-04-07
James, Andrew J.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
357 74, 174 16HS, 165 80B, H01L 2302, H01L 2312
Patent
active
042610052
ABSTRACT:
A one-piece stamped sheet-metal heat sink for dissipation of heat which accumulates about the plastic housing and metallic tab of a miniature semiconductor power device is formed as a shallow open-topped channel having short upstanding sides which flare laterally outwardly and then upwardly and then both inwardly and downwardly to bent-over inner edges spaced apart just slightly closer than the sides and inclined above the sides in position to engage top edges of a plastic semiconductor package fitting within the channel. The symmetrical unitary structure thus formed exhibits flexibility enabling its inner edges to spread apart readily as a semiconductor package is pressed into the channel and to spring back into the position where its edges engage and hold the package.
REFERENCES:
patent: 3047648 (1962-07-01), Mowatt
patent: 3407868 (1968-10-01), Coe
patent: 3548927 (1970-12-01), Spurling
patent: 3572428 (1971-03-01), Monaco
patent: 3670215 (1972-06-01), Wilkens et al.
patent: 3893161 (1975-07-01), Pesak
patent: 4012769 (1977-03-01), Edwards et al.
patent: 4041524 (1977-08-01), Trunk et al.
patent: 4054901 (1977-10-01), Edwards et al.
Aavid Engineering, Inc.
James Andrew J.
Mrose James E.
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