Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2006-06-13
2006-06-13
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S827000, C029S841000, C029S848000, C029S855000, C029S856000, C438S122000, C438S123000, C361S760000
Reexamination Certificate
active
07059042
ABSTRACT:
A sheet-like thermally conductive resin composition containing 70 to 95 wt. % inorganic filler and 5 to 30 wt. % thermosetting resin composition, a lead frame as a wiring pattern, and an electrically conductive heat sink with a metal pole placed therein are superposed, heated and compressed, and thus are combined to form one body. Consequently, a thermally conductive circuit board with a flat surface is obtained in which a grounding pattern is grounded to the heat sink inside the insulating layer. Thus, the grounding pattern and the heat sink can be connected electrically with each other in an arbitrary position inside the insulating layer of the thermally conductive circuit board. Accordingly, there are provided a thermally conductive circuit board with high heat dissipation, high conductivity and high ground-connection reliability, a method of manufacturing the same, and a power module allowing its size to be reduced and its density to be increased.
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Hirano Koichi
Matsuo Mitsuhiro
Nakatani Seiichi
Yamashita Yoshihisa
Hamre Schumann Mueller & Larson P.C.
Matsushita Electric - Industrial Co., Ltd.
Nguyen Tai
Tugbang A. Dexter
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