Multilayer circuit boards

Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits

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174152GM, 361414, H05K 103

Patent

active

043130267

ABSTRACT:
A multilayer circuit board (10) for putting semiconductor devices thereon consists of conductor layers (6, 60, 61, 62, 63) made of a metal selected from the group consisting of Au, Ag, Cu and an alloy thereof, insulating material (2, 7) made of glass-ceramic and an alumina sintered plate (1). The glass-ceramic is comprised of borosilicate glass and alumina and has a low dielectric constant and a thermal expansion coefficient approaching that of the semiconductor devices. The alumina sintered plate (1) is placed between the ground and supply voltage conductor layers (62, 63) and the signal conductor layers (60).

REFERENCES:
patent: 2885826 (1959-05-01), Grieve et al.
patent: 3200298 (1965-08-01), Garibotti
patent: 3312870 (1967-04-01), Rhoades
patent: 3423517 (1969-01-01), Arrhenius
patent: 3723176 (1973-03-01), Theobald et al.
patent: 4047132 (1977-09-01), Kratjewski
Grubb, H. R., "Densely-Packaged Magnetic Film Memory", IBM Tech. Disc. Bull., vol. 14, No. 4, Sep. 1971, p. 1145.

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