Murata Manufacturing Co., Ltd.

Koichi Yamada

Yuuta Hoshino

Toshiaki Kaji

Tomoya Ooshima

Yoshimasa Yoshino

Suetake Omiya

Mitsuru Nakano

Miki Sasaki

An electronic component that includes: a base body; wiring inside the base body; a glass film covering an outer surface of the base body; an underlying electrode electrically connected to the wiring and covering a part of the glass film; and a metal layer covering the underlying electrode, wherein the glass film includes an uncovered portion that is not covered with the underlying electrode and separated from an outer edge of the underlying electrode by more than 10 μm, and a boundary portion that is not covered with the underlying electrode and not separated from the outer edge of the underlying electrode by more than 10 μm, and a thickness of the boundary portion is larger than a thickness of the uncovered portion.

Electronic component

A method of manufacturing a piezoelectric ceramic device having excellent piezoelectric characteristics and high reliability is described. The method includes the steps of coating conductive paste containing Ag as a main component on each of a plurality of ceramic green sheets each containing a piezoelectric ceramic material, laminating the plurality of ceramic green sheets to form a laminate, and burning the laminate under an atmospheric condition in which the oxygen concentrations in a heating process and a retention process are about 21% by volume or more, and the oxygen concentration in a cooling process is about 0.05% by volume to 3% by volume.

Method of manufacturing monolithic piezoelectric ceramic device

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Yokaichi, Japan

Koichi Yamada