Ceramic multilayer substrate and method for manufacturing the same

摘要

A ceramic multilayer substrate includes stacked ceramic layers; internal conductors which are stacked with one of the ceramic layers therebetween, and are arranged such that at least a portion of the internal conductors overlap each other in a stacking direction; and a constraining layer which is arranged on a layer different from layers on which the internal conductors are located. The constraining layer overlaps, in the stacking direction, an internal conductor-overlapping region where at least two of the internal conductors overlapping each other in the stacking direction, has a planar area not more than twice the planar area of the internal conductor-overlapping region, and contains an unsintered inorganic material powder. The constraining layer has a planar area not more than one-half the planar area of the ceramic layers. The constraining layer is arranged so as to entirely cover the internal conductor-overlapping region.

主权项

1. A ceramic multilayer substrate comprising:
a plurality of stacked ceramic layers; a plurality of internal conductors which are stacked on each other with a respective one of the ceramic layers between adjacent pairs of the plurality of internal conductors, the plurality of internal conductors being arranged such that at least a portion of the plurality of internal conductors overlap each other in a stacking direction; and at least one constraining layer which is located on a layer different from layers on which the internal conductors are located; wherein the at least one constraining layer is arranged to overlap, in a stacking direction, an internal conductor-overlapping region where at least two of the internal conductors overlapping each other in the stacking direction overlap each other; the at least one constraining layer includes a planar area that is not more than twice a planar area of an internal conductor-overlapping region; the at least one constraining layer contains an inorganic material powder that is not sintered; the at least one constraining layer has a planar area that is not more than one-half of a planar area of the ceramic layers; the at least one constraining layer is made of a different material from a material from which the plurality of internal conductors are made; and the at least one constraining layer has a thickness less than a thickness of each of the plurality of internal conductors.