Matsushita Electric Industrial Co., Ltd.

Mitsuhiro Yamamoto

Yoshihiro Kiyomura

Masanori Fujimura

Tokuji Nishino

Hiroshi Oishi

Katsutoshi Nakamatsu

Mitsuaki Kimoto

A ceramic capacitor for operating at a suppressed self heat-generation and a low loss even in high voltage operating conditions, including a dielectric ceramic element assembly having two surfaces and made of a material selected from the group consisting of a dielectric composition of CaTiO &mdash;La O &mdash;TiO system, a dielectric composition of CaTiO &mdash;La O &mdash;TiO &mdash;SrTiO system, a dielectric composition of SrTiO &mdash;CaTiO system, a dielectric composition of SrTiO &mdash;CaTiO &mdash;Bi O &mdash;TiO system, a dielectric composition of SrTiO &mdash;PbTiO &mdash;PbTiO system, and a dielectric composition of SrTiO &mdash;PbTiO &mdash;Bi TiO &mdash;CaTiO system; and an electrode made mainly of Zn located on each of the two surfaces of the dielectric ceramic element.

Ceramic capacitor

An electronic part such as a ceramic capacitor and a resistor used in various kinds of electric appliances has an apprehension that an electronic part element might be red-heated to be burnt when an abnormal current flows in spite of dielectric covering member, and therefore it has been impossible to supply a nonflammable electronic part having a stabilized performance. In the present invention, an electronic part is constructed such that since an electronic part element 8 such as a condenser or a resistor is put in a case 5 which in turn is nearly sealed to cut off the supply of oxygen, the electronic part is prevented from catching fire even if it generates heat, and since an opening 6 is formed in a portion of the case 5 or a sealing member 7 so as to allow the gas to be let out, when the electronic part generates heat to increase the pressure, the case 5 can be prevented from being ruptured. Accordingly, it is possible to provide a nonflammable electronic part having stabilized characteristics.

Electronic part having communication means

Growing community of inventors

Miyazaki-gun, Japan

Mitsuhiro Yamamoto