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. 21, 2006
Filed:
Nov. 28, 2003
Kug Sun Hong, Seoul, KR;
Dong Wan Kim, Seoul, KR;
Hyun Seung Yu, Seoul, KR;
Hee Bum Hong, Seoul, KR;
Jeong Ryeol Kim, Seongnam-si, KR;
IN Sun Cho, Gimcheon-si, KR;
Kug Sun Hong, Seoul, KR;
Dong Wan Kim, Seoul, KR;
Hyun Seung Yu, Seoul, KR;
Hee Bum Hong, Seoul, KR;
Jeong Ryeol Kim, Seongnam-si, KR;
In Sun Cho, Gimcheon-si, KR;
Seoul National University Industry Foundation, Seoul, KR;
Abstract
Disclosed herein is a phosphate-based dielectric ceramic composition which has a low dielectric constant and a low dielectric loss in the high-frequency bands such as microwave and millimeter wave. The composition is represented by the following formula: (1-x)(A'A″)O-xPOwherein x and y are numbers satisfying the following conditions: 0 <×<1 and 0≦y≦1, and A′ and A″ are each independently selected from the group consisting of Ca, Ba, Sr, Zn, Mb, Ni, Mn and Cu. The composition may further include a sintering assistant and an additive. Since the composition can be sintered at a temperature as low as 1,000° C., it can be simultaneously calcined together with a metal electrode such as silver, copper or silver/palladium electrode.