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:
Mar. 06, 1990
Filed:
Mar. 23, 1988
Applicant:
Inventor:
I Macit Gurol, Strafford, PA (US);
Assignee:
John Fluke Co., Inc., Everett, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
156 89 ; 156285 ; 156297 ; 156300 ; 156311 ; 65 5921 ; 65 5922 ; 65 5923 ; 26427211 ; 501 15 ; 501 17 ; 501 21 ; 501 69 ;
Abstract
A cermic substrate supports a thin or thick film electronic circuit hermetically enclosed by a vitreous glass covering sealed to the ceramic substrate by a heat fused vitreous sealing glass. The vitreous sealing glass is screened onto the vitreous glass covering in a composition comprising a binder material and a liquifier. The electronic circuit is trimmed by a laser beam directed through the vitreous glass covering as one of the final process steps after completion of those process steps which tend to affect the resistivity of the resistive element; process steps such as high temperature baking and soldering of component parts.