Nitto-denko Corporation

Toshihiko Tomita

Masao Nakamura

Tokio Fujita

Toshiaki Iwamoto

Masakazu Sugimoto

Hitoshi Ishizaka

Masayuki Kaneto

Gosei Uemura

Chiaki Harada

Toshio Nakajima

Junichi Nakazono

Tadanori Michimoto

Hitoshi Matsuoka

Taizo Sasaki

Mamoru Hondo

The present invention provides a method for correcting a semi-conductive belt, the semi-conductive belt including a resin and a conductive substance, the method having grinding a geometrically defective part of the semi-conductive belt to flatten the geometrically defective part.

Method for correcting semi-conductive belt

A semiconductive belt comprising a polyimide film having a volume resistivity of 10,&OHgr;cm to 10,&OHgr;cm and a surface resistivity of 10,&OHgr; to 10,&OHgr; at 25&deg; C. and 60% RH, wherein the amount of change of the surface resistivity between 30&deg; C. and 85% RH and 10&deg; C. and 15% RH in terms of common logarithm being is 1.0 or smaller.

Semiconductive belt

A method for producing optical disks each by bonding two disk substrates to each other through an adhesive sheet, which comprises the steps of: preparing a tape which includes a release tape, and a plurality of disk-like adhesive sheets arranged under a lower surface of the release tape at predetermined intervals; pressing the tape against an upper surface of a first disk substrate by an elastic material to thereby temporarily bond the first disk substrate to one of the adhesive sheets under the lower surface of the tape so as to form a temporarily bonded article; separating the release tape from the temporarily bonded article to expose the adhesive sheet; putting a second disk substrate on the exposed adhesive sheet and pressing the second disk substrate against the exposed adhesive sheet by the elastic material to thereby stick the second disk substrate to the temporarily bonded article so as to form a stuck article; and keeping the stuck article under a pressure or heat and pressure atmosphere to thereby bond the first and second disk substrates.

Method of producing optical disks and apparatus used therefor

Composite tubular article and process for producing the same

Growing community of inventors

Osaka, Japan

Toshihiko Tomita