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:
Sep. 02, 2003
Filed:
May. 23, 2001
Chang Hak Choi, Seoul, KR;
Jun Hwan Jeong, Inchon, KR;
Byung Kyu Kim, Seoul, KR;
Min Han Kim, Seoul, KR;
Sahn Nahm, Seoul, KR;
Hwack Joo Lee, Daejeon, KR;
Amotech Co., Ltd., Kyungki-do, KR;
Abstract
The present invention discloses a dielectric ceramic composition having a formula represented by (1−x)Nd(Ga Al )O -xCaTiO , wherein x refers a mole fraction of CaTiO to the composition and satisfies an expression of 0.5≦x≦0.8, and y refers a mole fraction of Al to Ga and satisfies an expression of 0≦y≦0.9. The present dielectric substance has a high dielectric constant and a high Q value and a resonant frequency temperature coefficient of near 0. Also, it can be sintered at a low temperature and thus replace the conventional dielectric materials used as a filter for parts of mobile communication or satellite communication appliances.