Ceramic powder for a green sheet and multilayer ceramic substrate

Abstract

Provided is a ceramic powder for a green sheet that gives a low-temperature fired ceramic substrate that can be fired at a temperature of 900° C. or lower and has excellent dielectric properties in the higher frequency bands such as microwave and millimeter-wave bands, has a low hygroscopicity, and has minor warping and creasing even in the case of co-firing with a silver-based conductor paste, the ceramic powder for a green sheet including a glass powder and an alumina powder, in which the glass powder contains 35 to 39% by weight of SiO2, 9 to 17% by weight of Al2O3, 21 to 40% by weight of B2O3, 10 to 20% by weight of R′O, wherein R′ is one or more kinds selected from the group consisting of Mg, Ca and Ba, 0.2 to 2% by weight of Li2O, and 0.5 to 2% by weight of MO2, wherein M is one or more kinds selected from the group consisting of Ti and Zr, so that the total is 100% by weight.

Dependencies are inferred from the claim text.