Low-temperature sinterable ceramic composition and multilayer ceramic substrate

摘要

A low-temperature sinterable ceramic composition which can be simultaneously sintered with a low melting point metal, such as silver or copper, has a preferable combination of high strength and superior electrical characteristics. The low-temperature sinterable ceramic composition is formed by mixing a ceramic component comprising an MgO crystal phase and an MgAl2O4 crystal phase and a glass component composed of 13 to 50 wt% silicon oxide, 3 to 30 wt% boron oxide, and 40 to 80 wt% alkaline earth oxide. The ceramic composition may also include copper oxide and the glass component may contain alkali metal oxide eg. Li2 O. The composition is used to form the insulating layer in a multilayer ceramic substrate comprising an insulating layer laminated to a conductive layer.