Glass-ceramics suitable for dielectric substrates

Details Glass-ceramics suitable for dielectric substrates Glass-ceramics suitable for dielectric substrates

1988-05-26

1989-08-01

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 5, 501 70, 501 72, 501 73, C03C 1006

Patent

active

048533491

ABSTRACT:
This invention is directed to the preparation of two groups of glass-ceramic materials exhibiting properties rendering them especially suitable as substrates for integrated circuit packaging. The first group of materials contains gehlenite, anorthite, and akermanite as the predominant crystal phases and consists essentially, in weight percent of 1-7.25% MgO, 22-40% CaO, 18-36% Al.sub.2 O.sub.3, and 29-42% SiO.sub.2. The second group of materials contains gehlenite, anorthite, and hardystoneite as the predominant crystal phases and consists essentially, in weight percent, of 2-13% ZnO, 22-37.5% CaO, 18-34% Al.sub.2 O.sub.3, and 28-42% SiO.sub.2.

REFERENCES:
patent: 4187115 (1980-02-01), Reade
patent: 4323652 (1982-04-01), Baudry et al.
patent: 4358541 (1982-11-01), Andrus et al.
patent: 4714687 (1987-12-01), Holleran et al.

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