Patent ID: 7781065
Filing Date: 2010-08-24
Classification: H01L,H05K

Abstract:
1. A multilayer ceramic substrate comprising: a base material layer including an aggregate of first particles containing a crystallized glass material and a first ceramic material; a constraining layer including an aggregate of second particles containing a second ceramic material that does not sinter at a temperature at which the crystallized glass material is melted; an intercalating layer including an aggregate of third particles containing a viscosity-decreasing substance that decreases the viscosity of a melted crystallized glass material; and conductive films arranged along a main surface of at least one of the base material layer, the constraining layer and the intercalated layer; wherein the intercalating layer is arranged such that one main surface is in contact with the base material layer and the other main surface is in contact with the constraining layer; the intercalating layer has a thickness of about 2 μm to about 10 μm; at least a portion of the first particles is in a sintered state; and the second particles are in an unsintered state but are bonded to each other by a portion of the first particles containing the crystallized glass material and a portion of the third particles that diffuse or flow into the constraining layer.