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Circuit Module With Multi-Part Piston Located in a Channel of a Heat Sink With Wedge Mechanism for Expanding the Piston Against the Sides of the Channel

IP.com Disclosure Number: IPCOM000034858D
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Agonafer, D: AUTHOR [+2]

Abstract

Some circuit modules have a flat dielectric structure that carries an array of semiconductor chips on its upper surface and has internal wiring that interconnects the chips. A structure called a hat is attached to the chip carrier and forms the top of an enclosure for the chips. A structure called a piston is slidably located in a hole in the hat and contacts a chip for conducting heat in the hat. The hat is water-cooled. In this module, the lower surface of the hat has grooves that run along rows of chips where piston holes would otherwise be located. As seen in section, the grooves have a trapezoid shape with the opening wider than the roof of the channel and with sidewalls slanting di agonally outward from the roof to the opening. A multi-part piston is square as seen from the top.

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Circuit Module With Multi-Part Piston Located in a Channel of a Heat Sink With Wedge Mechanism for Expanding the Piston Against the Sides of the Channel

Some circuit modules have a flat dielectric structure that carries an array of semiconductor chips on its upper surface and has internal wiring that interconnects the chips. A structure called a hat is attached to the chip carrier and forms the top of an enclosure for the chips. A structure called a piston is slidably located in a hole in the hat and contacts a chip for conducting heat in the hat. The hat is water-cooled. In this module, the lower surface of the hat has grooves that run along rows of chips where piston holes would otherwise be located. As seen in section, the grooves have a trapezoid shape with the opening wider than the roof of the channel and with sidewalls slanting di agonally outward from the roof to the opening. A multi-part piston is square as seen from the top. Two parts are symmetrical about the axis of the channel. Each part has a flat lower surface that contacts the top of the chip and an outer side that slants at an angle to make good thermal contact with the adjacent side of the channel. The tops of these two parts are beveled to receive a spring-loaded wedge which urges the two parts downward against the chip and outward against the sides of the channel. The drawing is a section view showing the chip carrier 2, a chip 3, the hat 4, the two symmetrical parts 5 and 6, the wedge 7 and t...