Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1996-03-29
1998-01-20
Ryan, Patrick
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428210, 428688, 428901, B32B 900
Patent
active
057099278
ABSTRACT:
A thick film circuit board comprising an insulating substrate; conductor wiring layers of a conductive material containing an oxide and formed on the insulating substrate by printing and firing; a resistance layer of a resistive material having a selected sheet resistance, being chemically reactive with the oxide, and formed between and bridging the conductor wiring layers by printing and firing; and a conductive barrier layer interposed between each of the conductor wiring layers and the resistance layer to prevent chemical reaction between the oxide of the conductor wiring layers and the resistive material of the resistance layer.
REFERENCES:
patent: 4728534 (1988-03-01), Ho
patent: 5016089 (1991-05-01), Fujii
patent: 5204166 (1993-04-01), Ito
Miyase Yoshiyuki
Naito Akihiko
Nomura Tohru
Okumura Takamasa
Nippondenso Co. Ltd.
Ryan Patrick
Sumitomo Metal Ceramics Inc.
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