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Thermal Conduction Module With Cross-Shaped Pistons Arranged in Interwoven Pattern for Increased Surface Area and Improved Thermal Transfer Between Pistons and Hat

IP.com Disclosure Number: IPCOM000034877D
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Agonafer, D: AUTHOR [+2]

Abstract

A known thermal conduction module (TCM) has a hat that carries pistons that contact semiconductor chips and carry heat from the chips into the hat structure via the piston. In an arbitrary orientation, the chips are positioned in a horizontal plane and the hat is positioned above the chips. Commonly, the pistons are cylindrical and bit into downwardly, opening cylindrical holes in the hat. Heat transfer from piston to hat is improved with increasing contact surface area between the piston and hat, and it has been proposed to provide fins that extend radially from a piston into vertical slots formed in the hat [*]. In this module, a piston is made in the shape of a cross with four rectangular legs perpendicular to one another.

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Thermal Conduction Module With Cross-Shaped Pistons Arranged in Interwoven Pattern for Increased Surface Area and Improved Thermal Transfer Between Pistons and Hat

A known thermal conduction module (TCM) has a hat that carries pistons that contact semiconductor chips and carry heat from the chips into the hat structure via the piston. In an arbitrary orientation, the chips are positioned in a horizontal plane and the hat is positioned above the chips. Commonly, the pistons are cylindrical and bit into downwardly, opening cylindrical holes in the hat. Heat transfer from piston to hat is improved with increasing contact surface area between the piston and hat, and it has been proposed to provide fins that extend radially from a piston into vertical slots formed in the hat [*]. In this module, a piston is made in the shape of a cross with four rectangular legs perpendicular to one another. To receive and hold the pistons, the TCM hat has openings consisting of two perpendicular slots at each chip site. At adjacent chip sites, the slot patterns in the hat are rotated 45 degrees relative to one another. The rotation allows the pistons to be arranged in an interwoven pattern so that each leg of the piston is between two legs of the four adjacent pistons. The four legs of the cross make up the contact surface between the piston and hat. The contact area between the piston and hat is enlarged over the previous art by allowing the legs of the pistons to protrude into the...