Electricity: conductors and insulators – Conduits – cables or conductors – Preformed panel circuit arrangement
Patent
1988-06-21
1991-02-12
Dixon, Jr., William R.
Electricity: conductors and insulators
Conduits, cables or conductors
Preformed panel circuit arrangement
501134, 501135, 501136, 428138, 428209, 428210, 428212, 428426, 428432, 428697, 428901, 252623BT, H05K 103, C04B 3546, B32B 300
Patent
active
049923994
ABSTRACT:
The present invention provides a ceramic having a first region comprising a dielectric porcelain having an insulating layer at the crystal grain boundary of a semiconductor porcelain containing 0.50 to 5.30 mol parts of MnO.sub.2 and 0.02 to 0.40 mol parts of Y.sub.2 O.sub.3 per 100 mol parts of the principal components comprising 49.50 to 54.00 mol % of TiO.sub.2 and 50.50 to 46.00 mol % of SrO, and a second region comprising a dielectric porcelain containing further 0.40 to 5.00 mol parts of Al.sub.2 O.sub.3 and 0.05 to 2.00 mol parts of SiO.sub.2 per 100 mol parts of the principal components in addition to the composition of the first region, and also provides a circuit substrate and an electronic circuit substrate using the same ceramic.
REFERENCES:
patent: 2648804 (1953-08-01), Steigerwalt et al.
patent: 4610969 (1986-09-01), Wada et al.
patent: 4610970 (1986-09-01), Wada et al.
patent: 4654750 (1987-03-01), Kumagai
patent: 4759965 (1988-07-01), Kato et al.
Kato Keiichi
Kumagai Motoo
Nagano Masato
Sakaguchi Michiaki
Canon Kabushiki Kaisha
Dixon Jr. William R.
Green Anthony J.
Nippon Oil & Fats Co. Ltd.
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