Patent ID: 6429164
Filing Date: 2002-08-06
Classification: C04B,H01P

Abstract:
A high frequency dielectric ceramic composition comprising:100 parts by weight of a main component containing Ba, Ti and at least one of Sm and Nd as metal elements and represented by the following formula: xBaO-y{(1âˆ’&agr;)X2O3-&agr;Nd2O3}-zXâ€²O2 â€ƒwherein X is Sm or Sm in combination with up to about 50% by mole of at least one member selected from the group consisting of La, Ce and Pr; Xâ€² is Ti or the combination of Ti and up to about 1.5% by mole of Zr; x, y, and z are % by mole; and &agr; is molar ratio; and x, y, z, and &agr; satisfy the following conditions: 13&lE;x&lE;23; 075&lE;z&lE;83; 0&lE;&agr;&lE;1; and x+y+z=100, and as secondary components, more than 0 and equal to or less than about 0.3 part by weight of a Mn compound in terms of MnO, and more than 0 and equal to or less than about 1 part by weight of a Ta compound in terms of Ta2O5.