Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2011-08-23
2011-08-23
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S846000, C029S847000, C029S848000, C029S849000, C029S739000, C029S745000
Reexamination Certificate
active
08001682
ABSTRACT:
A high-efficiency production method for a power module substrate with reduced line width of a conductive pattern provides an insulation substrate suitable for realizing a large current and a high voltage of a power module. According to the method, a brazing sheet is temporarily fixed on a first surface of a ceramics substrate by surface tension of a volatile organic liquid. The brazing sheet is also temporarily fixed on the first surface of a conductive pattern member punched from a base material by surface tension of same type of volatile organic liquid. The brazing sheet and the conductive pattern member are heated so as to volatilize the volatile organic liquid and a pressure is applied to the conductive pattern member in its thickness direction. The brazing sheet is melted to join the conductive pattern member with the first surface of the ceramics substrate.
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Nagase Toshiyuki
Negishi Takeshi
Angwin David P
Leason Ellis LLP.
Mitsubishi Materials Corporation
Tugbang A. Dexter
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