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Laminated Heat Sink with Variable Height Fins

IP.com Disclosure Number: IPCOM000104308D
Original Publication Date: 1993-Apr-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 151K

Publishing Venue

IBM

Related People

Mahaney, HV: AUTHOR [+2]

Abstract

Space limitations between the base of a heatsink and neighboring electronic or mechanical components dictate the maximum possible fin height and hence may limit heatsink performance. Since conventional heatsinks are typically rectangular and of uniform height, the minimum permitted height at any location on any fin will restrict the height of the entire heatsink. As such, improved thermal performance can be achieved by heatsinks of variable-fin-height.

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Laminated Heat Sink with Variable Height Fins

      Space limitations between the base of a heatsink and
neighboring electronic or mechanical components dictate the maximum
possible fin height and hence may limit heatsink performance.  Since
conventional heatsinks are typically rectangular and of uniform
height, the minimum permitted height at any location on any fin will
restrict the height of the entire heatsink.  As such, improved
thermal performance can be achieved by heatsinks of
variable-fin-height.

      As in known heatsink laminating techniques, the portion of the
plate 101 that will comprise the fin after assembly has the thickness
of the fin, while another portion 102, along the base edge of the
plate, has a thickness equal to the sum of the fin thickness and the
desired channel width.  The plate-fins are formed by known stamping
methods from conventional multi-gage strip 201.  So as to minimize
the scrap left after the stamping process, two plate-fins may be
stamped from each lengthwise section of a "double wide" multigage
strip.  The plate-fin stamped from one half of the strip is the
mirror image of the one stamped from the opposite side.

      When the desired number of the plate-fins are placed in a
stack, the plates are in direct contact over the areas of
fin-plus-channel thickness 102.  Known, uniform-fin-height laminated
heatsinks have areas of the fin-plus-channel thickness near both the
base and tip of the fin.  These areas serve to...