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Method of manufacturing heat sink apparatus

  • US 4,879,891 A
  • Filed: 06/05/1989
  • Issued: 11/14/1989
  • Est. Priority Date: 04/27/1987
  • Status: Expired due to Term
First Claim
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1. The method of forming a unitary heat sink metal body for use in removal of heat from a heat generating electronic device package comprising the steps of:

  • (a) extruding a unitary metal body of heat conducting material having a base surface on a first side thereof adapted to be positioned in thermally conductive contact with a heat generating electronic device package, said body including a predetermined number of parallel fins extending outwardly a first predetermined height from a side opposite said base surface, said predetermined number of parallel fins separated by a first predetermined number of parallel grooves of a first predetermined width and a first predetermined depth with the ratio of said first predetermined height to said first predetermined width being at least four to one; and

    (b) sawing the first predetermined number of parallel grooves to a second predetermined depth to provide a second predetermined height to said parallel fins, whereby the ratio of the second predetermined height of said predetermined number of parallel fins to the first predetermined width of said first predetermined number of parallel grooves is at least six to one.

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