Cooling plate and production method therefor
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United States of America Patent
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Feb 3, 2004
Grant Date -
Jan 30, 2003
app pub date -
Jun 20, 2002
filing date -
Jun 20, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cooling plate provided with a cooling medium passage therein is formed by integrally joining a plurality of metal plates each having a cooling medium passage forming groove on a joining surface thereof. An anodic oxide film is formed on at least the cooling medium passage forming groove on the joining surface, and the plurality of metal plates are integrally joined each other by a friction agitation joining method. This enhances corrosion resistance of the cooling medium passage, resulting in an improved durability and extended life, which enables uniform cooling performance.
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