Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Reexamination Certificate
2011-05-31
2011-05-31
Zimmerman, John J (Department: 1784)
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
C428S660000, C428S674000, C228S190000
Reexamination Certificate
active
07951467
ABSTRACT:
Recent semiconductor device becomes high powered, and on the material of heat sinks on which these devices are mounted, lower thermal expansion coefficient and higher thermal conductivity are needed. For this requirement, material with thermal conductivity as high as Cu alone and also with low thermal expansion coefficient, is needed. An aspect in accordance with the present invention provides, a cladding material in which 1st material layer and 2nd material layer are laminated alternately, wherein thermal expansion coefficient of said 2nd material is lower than the thermal expansion coefficient of said 1st material, and thermal conductivity of said 2nd material is lower than the thermal conductivity of said 1st material, and a total number of laminated layers composed of said 1st material and said 2nd material is 5 or more.
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Akerman & Senterfitt
Neils, Esq. Paul F.
Zimmerman John J
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