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:
Nov. 13, 1984
Filed:
Jul. 25, 1983
Applicant:
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
361321 ; 361305 ; 501136 ;
Abstract
A ceramic dielectric composition for temperature compensating capacitors comprising 64-70.5% by weight of SrTiO.sub.3, 28-34% by weight of CaTiO.sub.3 and 1.5-4.5% by weight of Bi.sub.2 O.sub.3 or Bi.sub.2 O.sub.3.nTiO.sub.2 (where n=1 to 5). Not more than 10% by weight of MgTiO.sub.3 may be added, as necessary. The composition has high dielectric constant above 235 and Q above 2000 and low temperature coefficient of a dielectric constant up to -1000.times.10.sup.-6 /.degree.C. The ceramic element obtained by the composition has a large adhesion strength to electroless plating electrodes (nickel or copper).