Compositions: ceramic – Ceramic compositions – Devitrified glass-ceramics
Patent
1981-06-22
1983-11-01
Goldberg, Howard N.
Compositions: ceramic
Ceramic compositions
Devitrified glass-ceramics
29840, 65 33, C03C 322, H05K 334
Patent
active
044130619
ABSTRACT:
Sintered glass-ceramic substrates containing multi-level, interconnected thick-film circuit patterns of highly conductive metals such as gold, silver or copper are provided which can be fired in air (for gold and silver) or in neutral atmospheres (for copper) at temperatures below the melting points of these metals. This has been made possible by the discovery that finely divided powders of certain glasses described herein sinter to essentially zero porosity at temperatures below 1000.degree. C. while simultaneously maturing to glass-ceramics of low dielectric constant, high flexural strength and low thermal expansivity.
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IBM Tech. Discl. Bulletin, vol. 14, No. 9, Feb. 1972, p. 2581, by L. C. Anderson et al.
Kumar Ananda H.
McMillan Peter W.
Tummala Rao R.
Arbes Carl J.
Goldberg Howard N.
International Business Machines - Corporation
Powers Henry
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