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. 10, 1991
Filed:
Aug. 23, 1990
Applicant:
Inventors:
Jau-Ho Jean, Export, PA (US);
Tapan K Gupta, Monroeville, PA (US);
William D Straub, Pittsburgh, PA (US);
Assignee:
Aluminum Company of America, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 16 ; 501 32 ; 501 54 ; 501 65 ; 501 66 ;
Abstract
A ceramic composition for forming a ceramic dielectric body having a dielectric constant of less than about 4.2. The composition is formed from a mixture of finely divided particles of 25-50 vol. % borosilicate glass and 50-75 vol. % high silica glass. The borosilicate glass comprises approximately 20-35 wt. % B.sub.2 O.sub.3 and approximately 60-80 wt. % SiO.sub.2. The high silica glass contains essentially 0.5-1 wt. % alumina, 1-5 wt. % B.sub.2 O.sub.3 and approximately 95-98 wt. % SiO.sub.2. The composition can be fired at a temperature of less than 1000.degree. C.