Showa Denko K.k.

Showa Denko Kabushiki Kaisha

Masaaki Nishioka

Kazumi Naito

Masataka Takeuchi

Takashi Ohkubo

Shuichi Naijo

Isao Kabe

Ayako Nishioka

Atsuo Nishimura

Hidemitsu Takinishi

Shiro Fukuyama

Hiromi Niitsu

1. A niobium powder for capacitors, wherein the chromium content is 50 ppm by mass or less, granulated product and sintered body thereof, and producing method of those; 2. a capacitor constructed by one part electrode formed of the niobium sintered body, another part electrode and a dielectric material interposed between two electrodes, and its producing method; and 3. an electronic circuit and electronic device using the capacitor. A capacitor having good voltage resistance properties can be manufactured by using the niobium sintered body for capacitors of the present invention, wherein the chromium content is 50 ppm by mass or less.

Niobium for capacitor and capacitor using sintered body of the niobium

The polymer compound of the present invention which contains a poly- or oligo-carbonate group and is preferably obtained by utilizing a polymerization reaction using a polymerizable functional group represented by formula (2) and/or formula (3) below:

Polymerizable compound, solid polymer electrolyte using the same and use thereof

A random copolymer comprising, as repeating units,

Biodegradable or biocompatible copolymer and process for producing same

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Chiba, Japan

Masaaki Nishioka