Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Patent
1986-04-14
1987-12-15
Nimmo, Morris H.
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
361414, H05K 100
Patent
active
047134941
ABSTRACT:
A multilayer ceramic circuit board and method of forming such circuit board are disclosed. The wiring pattern for the multilayer ceramic circuit board includes multiple-layer portions, the multiple-layer portions including first and second electrically conductive layers, respectively a tungsten layer and a copper thick film, for example, with a diffusion layer therebetween for improving adhesivity of the first and second electrically conductive layers to each other. Such multiple-layer portions are provided by providing first and second electrically conductive layers, and an intermediate layer between the first and second electrically conductive layers, and diffusing at least one component from the intermediate layer into both the first and second electrically conductive layers. Thus, a multilayer ceramic circuit board with, e.g., a firmly coupled tungsten layer and copper thick film can be provided.
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Fujita Tsuyoshi
Oikawa Shoji
Saito Shigeru
Watanabe Takayoshi
Yamagishi Hiroshi
Hitachi , Ltd.
Nimmo Morris H.
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