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High-Performance Cooling using Corrugated Plate Heat Sink or Cold Plate Assemblies

IP.com Disclosure Number: IPCOM000106481D
Original Publication Date: 1993-Nov-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 4 page(s) / 93K

Publishing Venue

IBM

Related People

Ellsworth, MJ: AUTHOR [+3]

Abstract

A heat sink or cold plate with many discrete flow cells is formed by a lamination of several corrugated or multi-gage metal sheets. In one embodiment, corrugated metal sheets 101 are joined at interfacing flats 102 by conventional methods, such as spot welding, brazing, or direct bonding, (diffusion brazing) to form an array of hexagonal cells 103. Since the cells are conduits for a cooling fluid, those skilled in the art will recognize that reducing the cell size along one or both axes will increase the cell area density, thereby providing increased surface area within the structure for convection. Moreover, convection coefficients are higher in smaller cells.

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High-Performance Cooling using Corrugated Plate Heat Sink or Cold Plate Assemblies

      A heat sink or cold plate with many discrete flow cells is
formed by a lamination of several corrugated or multi-gage metal
sheets.  In one embodiment, corrugated metal sheets 101 are joined at
interfacing flats 102 by conventional methods, such as spot welding,
brazing, or direct bonding, (diffusion brazing) to form an array of
hexagonal cells 103.  Since the cells are conduits for a cooling
fluid, those skilled in the art will recognize that reducing the cell
size along one or both axes will increase the cell area density,
thereby providing increased surface area within the structure for
convection.  Moreover, convection coefficients are higher in smaller
cells.  Even greater cell area density is achieved in another
embodiment, where multi-gage metal sheets 201 are joined at
interfacing heavier gage regions 202 to form an array of narrow
rectangular cells 203.

      One face of the corrugated/multi-gage plate laminate is
attached by direct bond, (diffusion brazing) brazing or soldering to
a flat metal base 301.  Coolant enters from the top and flows down
through each cell 302, while heat is conducted from the base into the
cell walls and is convected to the fluid flowing through the cells.
Notches 104, 204, 303, which are coolant distribution slots, are cut
at the bottom of each cell.  Holes may be used in place of the slots,
if there is an advantage.  Fluid will pass...