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. 24, 2012
Filed:
Nov. 22, 2007
Hyo Tae Kim, Gyeonggi-do, KR;
Jong Hee Kim, Seoul, KR;
Myung Hwa Nam, Seoul, KR;
Abstract
A glass-free microwave dielectric ceramic that can be sintered at low temperature is provided. The glass-free microwave dielectric ceramic composition includes (MM')NBO(wherein M and M′ are different each other, each being one among Ba, Ca and Sr; N is one among Sn, Zr and Ti; and 0<x<1), M(NN′)BO(wherein M is one among Ba, Ca and Sr; N and N′ are different from each other, each being one among Sn, Zr and Ti; and 0<y<l), or (MM′)(N)BO(wherein M and M′ are different from each other, each being one among Ba, Ca and Sr; N and N′ are different from each other, each being one among Sn, Zr and Ti; 0<x<1; and 0<y<l). In addition, the glass-free microwave dielectric ceramic composition may further includes approximately 1 wt % to approximately 7 wt % of a sintering aid represented by a formula, 0.12CuO+0.88BiO. As such, the glass-free microwave dielectric ceramic composition may be sintered at a low temperature at lowest 875° C.