Base for heat sink
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United States of America Patent
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-
Mar 8, 2005
Grant Date -
Feb 27, 2003
app pub date -
Aug 24, 2001
filing date -
Aug 24, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A heat sink base (10) includes a rectangular body (11) made of aluminum and a circular core (12) made of copper. The body defines a circular through opening (111). A diameter of the opening is slightly less than a diameter of the core. The core is attached within the body according to the following steps: a) pressing the core into the through opening of the body; b) stamping the core to cause it to plastically deform in radial directions and thereby become firmly combined with the body; and c) removing any burring of the core flowing out from the opening such that surfaces of the core and the body are coplanarly smooth.
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