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|1. (WO2018037842) CERAMIC SUBSTRATE, AND MODULE WITH BUILT-IN ELECTRONIC COMPONENT|
|Applicants:||MURATA MANUFACTURING CO., LTD.
|Title:||CERAMIC SUBSTRATE, AND MODULE WITH BUILT-IN ELECTRONIC COMPONENT|
This ceramic substrate is provided with: a ceramic element having a ceramic layer on the surface; and a surface electrode that is provided on one main surface of the ceramic element. The ceramic substrate is characterized in that: an oxide layer formed of an insulating oxide is formed between the surface electrode and the ceramic layer, said oxide having a melting point that is higher than the firing temperature of the ceramic layer; the oxide layer is also provided on a ceramic layer portion where the surface electrode is not provided; and the surface of the oxide layer on the ceramic layer portion where the surface electrode is not provided is a rough surface.