Patent ID: 7138351

Claim:
A phosphate-based ceramic composition with a low dielectric constant, comprising: (a) a portion represented by the following formula: (1-x)(A′ 1-y A″ y )O-xP 2 O 5 wherein A′ and A″ are each independently Ca, Ba, Sr, Zn, Mg, Ni, Mn or Cu, and x and y are numbers satisfying the following conditions: ⅕≦x<⅖ and 0≦y≦1, x being defined in molar ratio, wherein said phosphate-based ceramic composition has a dielectric constant of 13.2 or less; and (b) 0.01˜5 parts by weight of at least one sintering assistant selected from the group consisting of CuO, B 2 O 3 and Bi 2 O 3 based on 100 parts by weight of the composition.