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Heat Sink With Cavities for Receiving Circuit Modules and Wax Coated Spring Pads Providing Heat Transfer Contact Between Module and Heat Sink

IP.com Disclosure Number: IPCOM000047891D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Hwang, UP: AUTHOR [+2]

Abstract

A metal heat sink is constructed with cavities that receive circuit modules when the heat sink is located over a circuit board, and heat from a module flows from the top of the module and across the top surface of the cavity. The modules may differ in height, and a metal spring pad is located between the module and the heat sink to provide contact. The pad is coated with wax, and after the heat sink and circuit board are assembled, the wax is reflowed to fill spaces between the module and the heat sink. This structure can be formed with two boards in a mirror image arrangement on opposite sides of a common heat sink. The drawing shows a circuit board 2, a representative module 3, and a section view of a disk-shaped copper pad 4 and a heat sink 5.

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Heat Sink With Cavities for Receiving Circuit Modules and Wax Coated Spring Pads Providing Heat Transfer Contact Between Module and Heat Sink

A metal heat sink is constructed with cavities that receive circuit modules when the heat sink is located over a circuit board, and heat from a module flows from the top of the module and across the top surface of the cavity. The modules may differ in height, and a metal spring pad is located between the module and the heat sink to provide contact. The pad is coated with wax, and after the heat sink and circuit board are assembled, the wax is reflowed to fill spaces between the module and the heat sink. This structure can be formed with two boards in a mirror image arrangement on opposite sides of a common heat sink. The drawing shows a circuit board 2, a representative module 3, and a section view of a disk-shaped copper pad 4 and a heat sink 5. Both sides of pad 4 are coated with wax, and the assembly is placed in an oven to reflow the wax to fill spaces
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