Stock material or miscellaneous articles – Composite – Of quartz or glass
Patent
1986-11-14
1988-05-31
Kittle, John E.
Stock material or miscellaneous articles
Composite
Of quartz or glass
428428, 428901, 501 15, 501 17, 501 65, 501 70, 501 72, B32B 1500, C03C 824, C03C 814
Patent
active
047480858
ABSTRACT:
In a multilayer ceramic circuit board comprising a substrate, an insulating layer on the substrate, and a conductive pattern on the insulating layer, an additive of Cr.sub.2 O.sub.3 or MnO.sub.2 is added to the insulating layer to reinforce adhesion between the insulating layer and the conductive pattern. Each of the substrate and the insulating layer is manufactured by firing at a temperature between 800.degree. C. and 1000.degree. C., alumina particles and a glass composition comprising an alumina component. When a total amount of alumina in the substrate is equal to or greater than that in the insulating layer, an amount of Cr.sub.2 O.sub.3 or MnO.sub.2 is restricted to a range between 0.1% and 10.0% by weight, with a difference between the total amounts of alumina falling within a range between 0% and 30% by weight. When the total amount of alumina in the substrate is smaller than that in the insulating layer, the amounts of Cr.sub.2 O.sub.3 and MnO.sub.2 may be between 0.1% and 10.0% by weight and between 0.1% and 15% by weight, respectively. The difference between the total amounts of alumina may be between 0% and 20% by weight.
REFERENCES:
patent: 4401766 (1983-08-01), Kyle
Fukaya Masashi
Fukuda Junzo
Kawabe Hiroshi
Nishigaki Susumu
Kittle John E.
Narumi China Corporation
Ryan Patrick J.
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