Browse Prior Art Database

Heatsink Mounting Method

IP.com Disclosure Number: IPCOM000116296D
Original Publication Date: 1995-Aug-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Corbin, JS: AUTHOR [+3]

Abstract

Disclosed is a method for mounting and structural support of a massive heatsink used to cool a surface-mount electronic module such as a microprocessor. This method is applicable to small auxiliary card assemblies, such as a processor upgrade card.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 73% of the total text.

Heatsink Mounting Method

      Disclosed is a method for mounting and structural support of a
massive heatsink used to cool a surface-mount electronic module such
as a microprocessor.  This method is applicable to small auxiliary
card assemblies, such as a processor upgrade card.

      The mounting system provides adequate structural support for a
card/heatsink assembly subjected to shock and vibration.  The system,
shown in Fig. 1, consists of a card assembly (A), preload clip (B),
plastic support bracket (C), and heatsink (D).  The card (A) is first
assembled into the bracket by flexing the bracket (C) open and
snapping the card into place.  The card is thus firmly retained at
all four corners by the plastic bracket and cannot easily be removed.
Next, a thermal interface material such as grease is applied to the
electronic module and the heatsink (D) is snapped in place over it.
Snap features in the bracket locate the heatsink relative to the card
and prevent relative motion, while backstops space the heatsink at
the proper distance from the card.  After the heatsink has been
snapped in place, the preload spring clip (B) is attached over the
heatsink, engaging the card.  This flexes the card slightly, and
supplies sufficient preload to the heatsink/module interface to
guarantee good thermal contact.  The completed subassembly can then
be handled or assembled into a larger electronic system, such as a
computer, using an edge connector on the card and mounti...