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Browse Prior Art Database

Cold Plate Vacuum Chuck for Cooling Printed Circuit Boards

IP.com Disclosure Number: IPCOM000103123D
Original Publication Date: 1990-Jun-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 52K

Publishing Venue

IBM

Related People

Hodgson, R: AUTHOR [+2]

Abstract

Disclosed is a cold plate device to make pressure contact to components on PC boards for cooling purposes where the boards may not flex and thus diaphragm cooling schemes cannot be used.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Cold Plate Vacuum Chuck for Cooling Printed Circuit Boards

      Disclosed is a cold plate device to make pressure contact to
components on PC boards for cooling purposes where the boards may not
flex and thus diaphragm cooling schemes cannot be used.

      The figure shows an exploded view of construction details of
the cold plate.  Three pieces of extruded aluminum are needed.  As
shown in the diagram, the top two pieces 1 and 2 are identical in
structure to a standard cooling plate made by simple extrusion.  A
continuous piece of copper tubing 3 could be simply laid in the
groove 4 formed by extrusion to transfer the heat from the cold plate
2 to the flowing water in the copper tubing.  The third piece of
aluminum 4 could be formed by casting or extrusion. The top of the
third piece has channels 5 formed in the top to lead the air leaking
in the vacuum chuck to the external connector 6 (presumably a quick
disconnect type).  The bottom of the third plate 4 is machined to
conform to the top surfaces of the components 7 to be cooled on the
printed circuit board 8.  If all components can be held in the wave
soldering machine so that the tops of the components lie in one
plane, the bottom surface of plate 4 could be flat. Otherwise, the
bottom surface of plate 4 must be machined to conform to the
components.  After this machining, holes 9 are drilled at the
position of the middle of the components to make a vacuum chuck.

      Disclosed anonymously.