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:
Jan. 20, 2004
Filed:
Jun. 27, 2001
Tomohiro Sogabe, Chiba, JP;
Thomas R. Shrout, Port Matilda, PA (US);
Michael T. Lanagan, State College, PA (US);
Clive A. Randall, State College, PA (US);
Hyuk-Joon Youn, State College, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
The disclosed invention relates to Bi O —ZnO—Ta O dielectric compounds and compositions, and to their manufacture. The compounds of the invention have outstanding K, Q, TCF, and TCC. Examples of these properties include a K of between 58 and 80, a low dielectric loss (tan &dgr;<0.003), and a TCC<30 ppm/° C. Ceramic compositions produced include those represented by Bi (ZnTa ) O where 0.57≦x≦1.0, Bi (ZnTa ) O where 1.0≦y≦3.0, as well as by Bi (ZnTa ) O where 1.0≦y≦3.0 with the proviso that y is not=2.0. Solid solutions of compounds defined by the formula r(Bi (Zn Ta ) O )-(1−r)(Bi Zn )(Zn Ta )O )) where 0<r<1 also are produced.