Metal working – Method of mechanical manufacture – Electrical device making
Patent
1985-08-22
1988-07-12
Chaudhuri, Olik
Metal working
Method of mechanical manufacture
Electrical device making
29837, 357 81, 361387, 361388, H05K 330, H05K 720
Patent
active
047560819
ABSTRACT:
A method for heat sinking a TO-220 solid state device package includes the steps of mounting the device from a printed circuit board, mounting the board from a heat sink and providing an opening in the board. The device is oriented during mounting so that it overlies the opening with its heat sinking tab side facing toward the opening and its epoxy case side facing away from the opening. A bar of thermally conductive material is positioned between the heat sink and the heat sinking tab side of the package and extends through the opening. A layer of electrically insulative and thermally conductive material is interposed between the bar and the heat sinking tab side of the package. Aligned passageways are provided through a second bar of thermally conductive material, the layer of electrically insulative and thermally conductive material, the first bar and the heat sink. Screws through the aligned openings clamp the device package in heat sinking orientation between the second bar and the layer of electrically insulative and thermally conductive material.
REFERENCES:
patent: 4254301 (1981-03-01), Serino
patent: 4266267 (1981-05-01), Ruegg
patent: 4342068 (1982-07-01), Kling
patent: 4546408 (1985-10-01), Rodseth et al.
patent: 4599680 (1986-07-01), Gibson et al.
Chaudhuri Olik
Dart Controls, Inc.
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