Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1990-04-06
1992-01-28
Ryan, Patrick J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428209, 428426, 428433, 428457, 428901, 427 96, 361397, 361414, 156 89, B32B 300
Patent
active
050843230
ABSTRACT:
Disclosed is a ceramic multi-layer wiring board comprising a multi-layer wiring board having a plurality of insulating layers and a plurality of refractory metal layers, which are alternately formed, the end portion of the outermost insulating layer among the insulating layers being covered with the outermost refractory metal layer among the refractory metal layers, an oxidation-resistant barrier layer formed on the outermost refractory metal layer, and a thick film conductor formed on the outermost insulating layer and the oxidation-resistant barrier layer. In this structure, since the end portion of the outermost insulating layer is covered with the oxidation-resistant barrier layer, defects do not appear in the end portion and the inner conductor layers are not oxidized even in a high-temperature oxidizing atmosphere.
REFERENCES:
patent: 4493789 (1985-01-01), Veyama et al.
patent: 4604496 (1986-08-01), Ishihara et al.
patent: 4791239 (1988-12-01), Shirahata et al.
patent: 4870746 (1989-10-01), Klaser
patent: 4893404 (1990-01-01), Shirahata et al.
Asai Michio
Morimoto Tadahiko
Nagasaka Takahashi
NGK Insulators Ltd.
Nippondenso Co. Ltd.
Ryan Patrick J.
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