Active solid-state devices (e.g. – transistors – solid-state diode – Combined with electrical contact or lead – Of specified material other than unalloyed aluminum
Patent
1997-03-26
1998-11-17
Ostrowski, David
Active solid-state devices (e.g., transistors, solid-state diode
Combined with electrical contact or lead
Of specified material other than unalloyed aluminum
257703, 257772, 257779, 257781, 438612, 438650, 438686, H01L 2348, H01L 2352
Patent
active
058380698
ABSTRACT:
A ceramic substrate having on the surface thereof a plurality of pads to be attached to terminal members is provided. Each pad includes a metallic layer formed on the surface of the substrate and a connecting layer made of a nickel base alloy and formed on the metallic layer. A gold-nickel layer made of a gold base alloy containing nickel is formed on the connecting layer. The gold-nickel layer may be formed by first forming a gold layer on the connecting layer and then making nickel in the connecting layer to diffuse into the gold layer by heat treatment. A method of producing such a ceramic substrate is also provided.
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patent: 5635764 (1997-06-01), Fujikawa et al.
Hashimoto Hiroyuki
Itai Motohiko
Kimura Kazuo
NGK Spark Plug Co. Ltd.
Ostrowski David
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