Tdk Corporation

Noriaki Hirano

Hisanao Tosaka

Nobuo Kobayashi

Tokuhiko Handa

Masaru Nanao

Mitsunao Homma

Kunio Mogi

Tsutomu Hatakeyama

Masahiro Kitajima

Yoshito Nihira

Tsukasa Kon

A piezoelectric element is provided with an element body, which has a pair of principal faces opposed to each other and an end face extending in a direction in which the pair of principal faces are opposed to each other, so as to connect the pair of principal faces, and which is comprised of a piezoelectric ceramic material; a pair of electrodes arranged respectively on the pair of principal faces; and a resin covering an entire area of the end face and arranged so as to make contact with the pair of electrodes. The resin has two edges in the aforementioned direction projecting outward in the aforementioned direction from the respective electrodes.

Piezoelectric element and method for manufacturing piezoelectric element

An object is to provide a PTC element capable of preventing lead terminals from delaminating from an element body. This PTC elementis a PTC element comprising an element bodyin which an electroconductive filler is dispersed in a crystalline polymer, and a pair of terminal electrodesthermocompression-bonded with the element bodyin between, wherein each of the pair of terminal electrodeshas an overlapping regionoverlapping with the element bodyand a nonoverlapping regionnot overlapping with the element bodyand wherein the nonoverlapping regionof each of the pair of terminal electrodesis constructed of a succession of a wide portiona width of which is large across a direction in which the terminal electrodeextends from the element bodyand a narrow portiona width of which is smaller than the width of the wide portion

PTC element

A PTC thermistorcomprises, at least, a pair of electrodesand a thermistor body, disposed between the electrodes, having a positive resistance vs. temperature characteristic. The thermistor body includes, at least, a thermoplastic resin and an electrically conductive particle made of a metal powder. The thermoplastic resin and electrically conductive particle have respective contents and a state of dispersion adjusted so as to yield a magnetization of 4.0&#xd7;10to 6.0&#xd7;10Wb&#xb7;m&#xb7;kgwhen a magnetic field of 3.98&#xd7;10A&#xb7;mis applied to the thermistor body.

PTC thermistor body, PTC thermistor, method of making PTC thermistor body, and method of making PTC thermistor

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Tokyo, Japan

Noriaki Hirano