Protective glass coatings for circuits on ceramic substrates

E. Berkovsky

doi:10.1117/12.151103

13 August 1993 Protective glass coatings for circuits on ceramic substrates

E. Berkovsky

Proceedings Volume 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine; (1993) https://doi.org/10.1117/12.151103
Event: 8th Meeting in Israel on Optical Engineering, 1992, Tel Aviv, Israel

Abstract

Low-melting glass ceramics were developed to form coatings that protect circuits on alumina substrates from corrosion. The influence of (beta) -eucryptite and nitrides on its thermal expansion and crystallization were studied. The coatings, formed from powdered glass at firing temperatures from 430 degree(s) to 480 degree(s)C, have thermal expansion coefficient in the range (95 -85) X 10^-7 degree(s)C. High resistance to thermal shock of coatings is due to the presence of crystal phases: 2PbO.ZnO.B₂O₃ and (beta) - eucryptite. At the surface of the coatings can be seen `islands' of nitrides hydrophobic thin film.

Citation Download Citation

E. Berkovsky "Protective glass coatings for circuits on ceramic substrates", Proc. SPIE 1972, 8th Meeting on Optical Engineering in Israel: Optoelectronics and Applications in Industry and Medicine, (13 August 1993); https://doi.org/10.1117/12.151103

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