Multilayered ceramic wiring circuit board and the method of prod

Details Multilayered ceramic wiring circuit board and the method of prod Multilayered ceramic wiring circuit board and the method of prod

1986-05-21

1988-04-05

Grimley, A. T.

Electricity: electrical systems and devices

Miscellaneous

29851, 174 685, 264 61, 428137, 428209, 428446, 428702, 428901, 501128, H05K 111, B32B 904

Patent

active

047362766

ABSTRACT:
Ceramic insulating substrate layers (1) for a multilayered ceramic wiring circuit board (3) consist essentially of crystals of mullite and sillimanite, non-crystalline silicon dioxide occupying the interstices between the crystals and magnesium oxide dissolved substantially in the crystals in solid solution and have a thermal expansion coefficient of 40-60.times.10.sup.-7 /.degree. C. and a dielectric constant below 6.7.

REFERENCES:
patent: 4272500 (1981-06-01), Eggerding et al.
patent: 4396720 (1983-08-01), Beall et al.
patent: 4460916 (1984-07-01), Hashimoto et al.
patent: 4528275 (1985-07-01), Hodge
patent: 4620264 (1986-10-01), Ushifusa et al.

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