Matsushita Electric Industrial Co., Ltd.

Hideo Matsumoto

Eiji Ohno

Kazuo Inoue

Kazuya Hisada

Kazuhiro Hayashi

Hidemi Isomura

Takafumi Asada

Hideaki Ohno

Toshiyuki Fujioka

Norihide Higaki

Koji Muraoka

Hiroyuki Fukuno

Takao Yoshitugu

Chuuryoh Yoshida

Toshio Onishi

Kajuyoshi Senma

An optical information recording medium is manufactured by bonding a first substrate having a first central bore and a second substrate having a second central bore to each other with radiation cure resin. The radiation cure resin is coated on the first substrate. The first and second substrates are brought into close contact with each other so as to form the first and second substrates integrally with the radiation cure resin. A neighborhood of the first and second central bores is radiated. A whole of at least one of opposite outer faces of the integral first and second substrates is irradiated with radiation so as to wholly cure the radiation cure resin.

Optical information recording medium and its manufacturing method and apparatus

An optical disk is provided by bonding two substrates to each using a radiation-hardening resin, and leveling and hardening the resin. In an optical recording medium manufacturing apparatus including lamps for emitting radiation to two disks attached to each other with a radiation-hardening resin layer sandwiched therebetween, and a rotation arm for supporting and rotating the two disks to allow the disks to traverse the emission area of the lamps, light source centers of the lamps are positioned radially outside a rotation locus of the center of the disks attached to each other, said locus being drawn while the disks are supported by the rotation arm.

Manufacturing apparatus and method for optical recording medium

A fluid-bearing apparatus comprising a shaft, a sleeve, dynamic pressure-generating grooves that are provided on either the shaft or on the bearing surface of the sleeve that faces the shaft, wherein a single-component composition is used as the base oil of a lubricant, and accordingly segregation of the lubricant components does not occur, thereby preventing both the development of cavitation arising from decreases in the local vapor pressure and the washing away of the lubricant to the outside of the region of the bearing resulting from the enhancement of the gradient of surface tension of the lubricant.

Fluid-bearing apparatus

Dynamic pressure type fluid bearing device

Growing community of inventors

Osaka, Japan

Hideo Matsumoto