The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 1992
Filed:
Jan. 28, 1991
Applicant:
Inventor:
Richard E Riley, Riverside, CA (US);
Assignee:
Spectrol Electronics Corporation, Ontario, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
156 89 ; 156298 ; 156252 ; 427101 ; 427102 ;
Abstract
A thick-film switch element includes a high-temperature glass frit fused to a ceramic substrate. A cermet layer having a low-temperature glass matrix is fired in a conventional furnace to sink into the glass frit layer such that the resulting thickness of the switch element layer is approximately equal to the original thickness of the glass frit layer. The exposed surface of the resulting thick-film switch element product is substantially smooth and the joint between the low-temperature cermet layer and the high-temperature glass frit layer is substantially uniform.