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Water-Cooled Circuit Module With Grooves Forming Water Passages Near Heat-Producing Devices

IP.com Disclosure Number: IPCOM000034875D
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Eid, JC: 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 to the hat. The hat is water-cooled. In this module, grooves are cut in the top of the hat between rows of piston holes. The hat is thin and the grooves are wide so that there is only a short thermal path through the flat roof of the piston hole and the cylindrical sides of the piston hole. A cover plate fits over the top of the hat to form an enclosure for water that circulates over the top of the hat.

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Water-Cooled Circuit Module With Grooves Forming Water Passages Near Heat-Producing Devices

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 to the hat. The hat is water-cooled. In this module, grooves are cut in the top of the hat between rows of piston holes. The hat is thin and the grooves are wide so that there is only a short thermal path through the flat roof of the piston hole and the cylindrical sides of the piston hole. A cover plate fits over the top of the hat to form an enclosure for water that circulates over the top of the hat. The cover plate has lands that extend into the grooves in the hat to force the cooling water to flow closely along the sides of the grooves. The piston has a center post that slides into the hole in the hat, a base that contacts the top of the chip and extends radially beyond the center post, and a cylindrical part that extends upward from the base to about half the height of the center post. The hat has a corresponding annular hole that receives the cylindrical part of the piston. A narrow groove is cut in the bottom of the wide groove and extends downward between the annular holes in the ha...