MULTILAYER CERAMIC SUBSTRATE AND ELECTRONIC COMPONENT USING SAME

摘要

A multilayer ceramic substrate including an inner-layer section, surface-layer sections stacked on opposed principal surfaces of the inner-layer section, and surface electrodes provided on at least one surface of the surface-layer sections. The surface-layer sections contain SiO2-MO—B2O3—Al2O3 based glass and an Al2O3 filler, wherein MO is at least one selected from the group consisting of CaO, MgO, SrO, and BaO. The coefficient of thermal expansion in the surface-layer sections is lower than the coefficient of thermal expansion in the inner-layer section, and the peak intensity ratio through an XRD analysis between MAl2Si2O8 and Al2O3 in the surface-layer sections falls within the range of 0.05≦(MAl2Si2O8/Al2O3)≦5, wherein M is at least one selected from the group consisting of Ca, Mg, Sr, and Ba.

主权项

1. A multilayer ceramic substrate comprising:
an inner-layer section; surface-layer sections on opposed first and second surfaces of the inner-layer section; and a surface electrode on at least one surface of the surface-layer sections, wherein the surface-layer sections are a fired glass ceramic based material containing SiO2-MO—B2O3—Al2O3 based glass and an Al2O3 filler, and MO is at least one selected from the group consisting of CaO, MgO, SrO, and BaO, a first coefficient of thermal expansion in the surface-layer sections is lower than a second coefficient of thermal expansion in the inner-layer section, a peak intensity ratio through an XRD analysis between MAl2Si3O8 as a crystal deposited on the surface-layer sections and Al2O3 in the surface-layer sections falls within 0.05≦(MAl2Si2O8/Al2O3)≦5, and M is at least one selected from the group consisting of Ca, Mg, Sr, Ba and oxides thereof.