Patent ID: 6938332

Claim:
A method for manufacturing multilayer ceramic substrates each including ceramic layers laminated to each other, comprising: providing a green composite laminate comprising a green multilayer mother substrate and a pair of shrinkage suppression layers which are disposed so as to sandwich the green multilayer mother substrate in the lamination direction, wherein the green multilayer mother substrate comprises a plurality of ceramic green layers which contain a sinterable insulating ceramic powder, wherein the green multilayer mother substrate has predetermined dividing lines defining a plurality of multilayer ceramic substrates, wherein the shrinkage suppression layers comprise an inorganic powder which is not sintered at a sintering temperature of the insulating ceramic powder, and wherein the green composite laminate has a plurality of through-holes each of which is disposed on a dividing line so as to penetrate at least the green multilayer mother substrate in the lamination direction; firing the green composite laminate under the conditions in which the insulating ceramic powder is sintered and the inorganic powder is not sintered to form a sintered multilayer mother substrate between the shrinkage suppression layers; removing the shrinkage suppression layers; forming external terminal electrodes of the multilayer ceramic substrates by wet plating the fired multilayer mother substrate from which the shrinkage suppression layer have been removed so as to deposit plating films on the surfaces of the conductors which are exposed at the inside surfaces of the through-holes for; and dividing the sintered multilayer mother substrate along the predetermined dividing lines to form a plurality of multilayer ceramic substrates each having side surfaces including moieties of the inside surfaces of the through-holes, whereby, after dividing the multilayer mother substrate, the conductors are exposed at parts of the side surfaces of the multilayer ceramic substrates corresponding to parts of the inside surfaces of the through-holes so as to form the external terminal electrodes.