Process for preparation of glazed ceramic substrate and glazing

Details Process for preparation of glazed ceramic substrate and glazing Process for preparation of glazed ceramic substrate and glazing

1985-09-13

1986-12-30

Smith, John D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

264 61, 427266, 427269, 427279, H05K 328

Patent

active

046328467

ABSTRACT:
A paste of a glazing composition is coated on the entire surface of a ceramic substrate having a metallized metal portion, and the paste-coated ceramic substrate is sintered in a reducing atmosphere, and a glazing layer is formed on the entire surface of the metallized metal portion by utilizing the repellency of the melt of the glazing composition to the metallized metal portion. A glazing composition comprising SiO.sub.2, B.sub.2 O.sub.3, BaO, Al.sub.2 O.sub.3 and an alkali metal oxide or a glazing composition comprising SiO.sub.2, BaO, Al.sub.2 O.sub.3, CaO and MgO or SrO is used. An acrylic resin syrup, especially an isobutyl methacrylate resin syrup, is used as a binder of a coating paste for forming a glazing layer.

REFERENCES:
patent: 3560236 (1971-02-01), Orth
patent: 4313900 (1982-02-01), Gonzales
patent: 4401709 (1983-08-01), Prabhu
Hashimoto et al, "Selective Glaze . . . ", Electrocomponent Science and Technology, vol. 8, Nos. 1 & 2, pp. 115-121 (1981).

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