Browse Prior Art Database

Plastic 36MM Module Heat Sink Retaining Clip

IP.com Disclosure Number: IPCOM000112074D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Nissen, J: AUTHOR [+2]

Abstract

36mm interstitial pin Ceramic modules (IMC) are used on the RISC System/6000* processor card. The modules create a lot of heat when operating. To overcome the heat a aluminum heat sink is attached to the top of the module with a stainless steel spring clip. The heat sink/clip helps to wick away the heat from the precious IMC modules.

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Plastic 36MM Module Heat Sink Retaining Clip

      36mm interstitial pin Ceramic modules (IMC) are used on the
RISC System/6000* processor card.  The modules create a lot of heat
when operating.  To overcome the heat a aluminum heat sink is
attached to the top of the module with a stainless steel spring clip.
The heat sink/clip helps to wick away the heat from the precious IMC
modules.

      The old 36mm heat sink clip was a problem.  When installing the
stainless steel clip over the aluminum module, shavings or slivers
were produced by the clip sliding across the soft aluminum module.
The aluminum slivers would lodge between the modules pins and make an
electrical short.  The electrical shorts have proven to be extremely
dificult to find and fix.  A new plastic design of the heat sink clip
incorporates removal/installation levers and a plastic, non-marring
surface which eliminates the metal slivers.

      Metal Shavings were being produced when the heat sink clip was
being attached.  The conductive metal shavings or slivers would short
across pins on the modules making the entire CPU card worthless.
This module heat sink clip has six features that make it superior to
the old design.

1.  Plastic Construction - This design uses a material that is cheap,
    easy to manufacture, and above all will not scratch the soft
    aluminum surface of the 36mm IMC modules.

2.  Installation/Removal Levers - The clip incorporates two small
    levers that are depressed together to facilitate in the
    installation and removal of the heat sink.  The clip does not
    require special tools to install...