Tdk Corporation

Asahi Kasei Kogyo Kabushiki Kaisha

Sanwa Needle Bearing Co., Ltd.

Mamoru Usami

Tomoki Ushida

Takeshi Umega

Kenji Yamaga

Junichi Ide

Kazushi Tanaka

Yukio Kaneko

Yoshimi Sakai

Atsushi Koyama

Haruhiko Yamaguchi

Tsuyoshi Komaki

Toshiki Aoi

Kenji Yoneyama

Kazuki Suzawa

Tsuyoshi Itoh

Futoshi Kobayashi

Yoshimi Yodogawa

Junichi Satou

Kenji Uchiyama

Kunihiko Ozaki

Naoyuki Echigo

Hiroshi Tominaga

Akihiko Kizaki

Mikio Domon

Kazuo Takahashi

Hiroshi Kobayashi

Hideki Hirata

Hiroyuki Arioka

Kenryo Namba

Akihiko Kuroiwa

Hideki Ishizaki

Hiroshi Takasaki

Shigeru Asami

Noriko Takeda

Atsuko Motai

Yoshimi Yodokawa

Kentaro Iida

Akira Itoga

Hideki Hijikata

Yoshitaka Kawamura

Teppei Osawa

An information medium substrate is formed as a flat plate and includes a first convex part formed on one surface of the information medium substrate in a region between a rim part of a center hole and an inner circumferential edge of an information region and a second convex part formed on another surface of the information medium substrate at a position that overlaps a protruding end part of the first convex part in a thickness direction of the information medium substrate.

Information medium substrate and information medium

An optical recording medium including a light transmitting layer having a uniform thickness formed on a substrate, in which a burr or stripping hardly occurs at the inner periphery of the light transmitting layer, and a manufacturing method and a manufacturing device of the optical recording medium are provided. An optical recording mediumis manufactured by a manufacturing method including: molding a disc-like shaped substrateincluding an information recording faceA on one side; forming a light transmitting layerthinner than the substrateon the information recording faceA; forming a circular cutin the light transmitting layer; and punching out an area inside the cutby a punching toolto form a center holeA in the light transmitting layerand a center holein the substrate

Optical recording medium, and manufacturing method and manufacturing device thereof

When manufacturing an optical recording medium by forming a resin layer on a surface of a substrate and then forming a center hole that passes through the substrate and the resin layer, a method of manufacturing an optical recording medium according to the present invention forms the center hole by forming, in the resin layer, a circular cut with a larger diameter than the center hole so as to surround a formation position of the center hole and then pressing in a punching blade for forming the center hole from a rear surface side of the substrate. By doing so, detachment of the resin layer and the production of burrs at or near the center hole can be avoided while reducing the manufacturing cost.

Optical recording medium producing method, and optical recording medium producing device

The present invention makes it possible to strip off a stamper stuck on a resin layer for groove formation during the manufacture of an optical disc from the resin layer without imparting damage or the like to the stamper. The present invention achieves this object by having the steps of bringing about a state in which the stamper protrudes from a substrate by a predetermined width, rotating the substrate with the back surface of the disc-shaped substrate attracted and held, elevating rollers capable of rolling relative to a contacting surface contacting with the protruding portion simultaneously with the rotation, and continuously applying a force working in a direction to separate the protruding portion from the substrate in the circumferential direction of the stamper.

Apparatus for and method of manufacturing an optical disc

An intermediate for an optical recording medium, according to the present invention, is an intermediate produced beforehand for manufacturing an optical recording medium that has a central mounting hole formed in a central portion thereof and one or more kinds of functional layers formed on a surface thereof, for enabling at least one of information recording and information reproduction. The intermediate has a provisional central hole, which is smaller in diameter than the central mounting hole, formed in a central portion thereof. This makes it possible to drop resin in the vicinity of the center of the intermediate without using a disk-shaped member, in performing spin coating on the intermediate, whereby it is possible to make the layer of applied resin substantially uniform in thickness.

Intermediate for optical recording medium and method of manufacturing the optical recording medium

A disc-shaped optical recording medium formed by carrying out a film formation process on a disc-shaped substrate material and completed by forming a center hole at the last step is manufactured in a manner such that no eccentricity will occur when the recording medium is loaded onto a drive. At the last step of an optical disc manufacturing process, i.e., at the time of opening a hole in the center partof the disc-shaped substrate materialformed with at least a resin layer on one side thereof, the center partis removed in a manner such that the diameter of the chucking center holeis larger on the disc-shaped substrate materialside than on the light transmitting resin layerside of the disc-shaped optical recording medium, thereby manufacturing the disc-shaped optical recording medium

Method for manufacturing discoid optical record medium and discoid optical record medium

An electron beam irradiation apparatus includes a turn-transfer mechanism; a turn irradiation chamber; an electron beam irradiation section; a replacement room configured to bring a target into and out of the turn irradiation chamber; an outer irradiation target holding table configured to form a part of the replacement room, and including an X-ray shielding mechanism, an airtightness maintaining mechanism, a target holding mechanism; an inner irradiation target holding table configured to form a part of the replacement room, and including an X-ray shielding mechanism, an airtightness maintaining mechanism, and a target holding mechanism, the inner irradiation target holding table being supported by the turn-transfer mechanism; a turning mechanism configured to drive the turn-transfer mechanism; and an elevator mechanism configured to move the turn-transfer mechanism, which supports the inner irradiation target holding table, up and down.

Apparatus and method for irradiating electron beam

An electron beam irradiation apparatus includes a turn-transfer mechanism; a turn-transfer chamber; an electron beam irradiation section; a replacement room configured to bring a target into and out of the turn-transfer chamber; an outer irradiation target holding table configured to form a part of the replacement room, and including an X-ray shielding mechanism, an airtightness maintaining mechanism, and a target holding mechanism; an inner irradiation target holding table, configured to form a part of the replacement room, and including an X-ray shielding mechanism, an airtightness maintaining mechanism, and a target holding mechanism, the inner irradiation target holding table being supported by the turn-transfer mechanism; a turning mechanism configured to turn the turn-transfer mechanism and an elevator mechanism configured to move the turn-transfer mechanism up and down; and a rotation mechanism disposed at the electron beam irradiation section and configured to rotate the target.

There is provided an optical recording medium-manufacturing apparatus that is capable of avoiding breakage of a substrate while avoiding formation of a central hole off-center with respect to the substrate. A control section causes the vertical movement section to move an ultrasonic horn in directions toward and away from the cutting edge of a punching blade section to thereby cause the ultrasonic horn to press the disk-shaped substrate and at the same cause an ultrasonic generator to perform ultrasonic vibration at least from a time point at which the disk-shaped substrate is brought into contact with the cutting edge of the punching blade section to a time point at which the punching of the central hole is completed.

Optical recording medium-manufacturing apparatus

Disclosed are an electron beam irradiation apparatus and an electron beam irradiation method that are capable of easily curing a material that is hard to be cured by irradiation of ultraviolet rays and of reducing the number of electron beam irradiation tubes. The electron beam irradiation apparatus has a motor for rotationally driving an irradiation target object, a shield container for rotatably accommodating the irradiation target object, and an electron beam irradiation unit provided in the shield container so that the surface of the irradiation target object is irradiated with electron beams, wherein the electron beam irradiation unit and the irradiation target object are relatively moved when the electron beam irradiation unit irradiates the surface of the irradiation target object with the electron beams during a rotation of the irradiation target object.

Electron beam irradiation apparatus, electron beam irradiation method, and apparatus for and method of manufacturing disc-shaped object

A method for manufacturing an optical recording medium of the present invention includes the steps of forming an underlying layer having a brightness of 8 or more and a chroma of 4 or less on a label surface of a disk body by a spin coating process, and forming an ink-receiving layer on the underlying layer. In the present invention, the underlying layer having a brightness of 8 or more and a chroma of 4 or less is formed by a spin coating process, thereby significantly decreasing the surface roughness of the underlying layer. Even if the ink-receiving layer is formed by the spin coating or slit coating process in which the surface quality of the underlying layer is greatly reflected, therefore, the average surface roughness (Ra) of the ink-receiving layer can be significantly decreased. Thus, printing by an ink jet printer can produce a color and brilliance close to those of a silver salt photograph.

Optical recording medium and method for manufacturing the same

An electron beam irradiation apparatus and method capable of easily curing at least part of a surface layer and/or a resin layer composed of materials that are hard to be cured by irradiation of ultraviolet rays. A disc-shaped object manufacturing apparatus and method capable of efficiently forming, on the disc-shaped object, at least part of a surface layer and/or a resin layer such as light transmitting layer, etc, thereunder. An electron beam irradiation apparatus comprises a rotary driving unit for rotationally driving an object, a shield container rotatably accommodating the object, and an electron beam irradiation unit provided in the shield container so that the surface of the object is irradiated with electron beams from an irradiation window thereof, wherein the surface of the object is irritated with the electron beams during its rotation from the irradiation window of the election beam irradiation unit. The surface of the on-rotating object can be thereby irradiated with the electron beams having larger energy than the ultraviolet rays have.

The present invention provides a method of manufacturing an optical recording medium having two recording layers on a supporting substrate and an optical recording medium obtained according to the method. A method of manufacturing an optical recording medium including the steps of: (A) providing a radiation-curable resin layer backed with a lining sheeton a stamperfor the formation of information pits and/or grooves for the first recording layer, irradiating the resin layer with radiation to cure the resin layer, and removing the stamper, thereby to form the light transmitting layersupported by the lining sheet; (B) forming the first recording layeron the light transmitting layer; (C) forming the second recording layeron the supporting substratewith information pits and/or grooves for the second recording layer formed; (D) laminating the lining sheetand the supporting substratevia the space layerso that the first recording layerand the second recording layerare located inside; and (E) removing the lining sheet

Method of manufacturing optical recording medium and optical recording medium

There is provided an intermediate for an optical recording medium, which can be uniformly coated with resin by the spin coating method without using a resin coating-assisting member, and allows formation of a central mounting hole without burrs. The intermediate comprises a hollow cylindrical protruding portion protruding from one surface on which functional layers are formed and a circular recess formed in a central portion of the other surface and having a diameter equal to that of the central mounting hole, and a temporary central hole formed to extend through a central portion of the recess and having a diameter smaller than that of the recess. The protruding portion has an outer diameter smaller than the diameter of the mounting hole and an inner diameter not smaller than the diameter of the temporary central hole, and has a central axis thereof substantially aligned with a center of the temporary central hole.

Intermediate for optical recording medium, mold, molding apparatus, and method of manufacturing optical recording medium

There is provided an optical recording medium-manufacturing apparatus that is capable of accurately transferring a disk-shaped apparatus during a manufacturing process, and at the same time occupies a small installation area. A control section causes a cut-forming machine installed at a cut-forming location to form a cut in a resin layer of a disk-shaped substrate, then causes an indexing mechanism to rotate a transfer stage to thereby transfer the disk-shaped substrate formed with the cut to a central hole-forming location, and then causes a punching machine to punch a central hole.

Growing community of inventors

Tokyo, Japan

Mamoru Usami