Patent ID: 6734127
Filing Date: 2004-05-11
Classification: C04B,H01G

Abstract:
A ceramic material having a dielectric constant of about 20,000 to about 55,000, a dielectric loss tangent (tan &dgr;) of about 0.05 to about 0.25, a low capacitance change with temperature (TCC) of about âˆ’15% to about 10% at a temperature of âˆ’55Â° C. to 150Â° C., a resistivity of about 106 &OHgr;cm to about 109 &OHgr;cm, and a grain size of about 0.5 to about 3.5 &mgr;m of the following general formula (I):(1âˆ’w)[(BaaSrbPbm)Lax](TiyMgz)O3+w Nb2O5â€ƒâ€ƒ(I) wherein a is 0.5 to 0.98, b is 0 to 0.3, m is more than 0 to 0.3, x is 0 to 0.05, y is 0.90 to 0.995, z is 0.005 to 0.1, and w is 0 to 0.05 in weight ratio.