Dielectric ceramics and electronic parts using the same

Abstract

A dielectric ceramics contains, at least, two kinds of metal ions and a dielectric constant changes continuously or step by step as a function of position. The metal ions contained in the dielectric ceramics are, at least, two kinds which are selected from Mg, Ca, Sr, Ba, Zn, Pb, Bi, Y, La, Ce, Nd, Sm, Gd, Er, Ti, Zr, Sn, Si and Mn, and the dielectric constant .epsilon. changes in the range of 7.ltoreq..epsilon..ltoreq.90. This dielectric ceramics is used in a dielectric substrate for stripline device, a dielectric substrate for monolithic IC and a dielectric block for polarizer. For example, when used as the dielectric substrate for stripline device, it is so formed that a dielectric constant at its center portion is constant, and that those at an outer portion becomes smaller step by step or continuously towards ends. In the case of forming a stripline on the dielectric substrate, when characteristic impedance is constant, a line width at a center portion of the dielectric substrate is narrow and it becomes wider towards ends.

Dependencies are inferred from the claim text.