H - Electricity – 05 – K
Patent
H - Electricity
05
K
H05K 1/02 (2006.01) H01L 21/48 (2006.01) H01L 23/15 (2006.01) H01L 23/498 (2006.01) H05K 3/06 (2006.01) H05K 3/10 (2006.01) H05K 1/03 (2006.01)
Patent
CA 2391218
A circuit board comprising a first metal layer formed in patterns on a ceramic substrate, a second metal layer formed in patterns on the first metal layer, and a third metal layer formed covering the top surface of the second metal layer and the majority of the side surface, wherein the first and partial second metal layers not covered by the third metal layer are reduced in width by etching. The circuit board has a fine and high-resolution wiring pattern and makes it possible to realize a miniature high-performance high-output module by mounting at least one high-output semiconductor element thereon.
Tatoh Nobuyoshi
Yorita Jun
Marks & Clerk
Sumitomo Electric Industries Ltd.
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