Title:
【発明の名称】光デイスク
Document Type and Number:
Japanese Patent JP2550084
Kind Code:
B2
Abstract:
PURPOSE:To produce a uniform protective film having high surface hardness by forming a protective layer consisting of a mixture composed of a UV curing resin and inorg. matter on a recording film. CONSTITUTION:The previously prepd. mixture 2 composed of the UV curing resin and alumina is coated on a disk-shaped substrate 1 having the recording film 5 on rugged patterns to the same disk shape and a stamper 3 having a flat surface is superposed thereon, then >=10kg load is exerted thereon from above over the entire part of the substrate to force spread the mixture composed of the UV curing resin and the alumina. The mixture 2 composed of the UV curing resin and the alumina is thereafter cured by projecting the UV rays 4 and the stamper 3 is removed. The protective film consisting of the mixture 2 composed of the UV curing resin and the alumina is then formed on the recording film 5 of the substrate. The optical disk having the protective layer of the high surface hardness is thereby obtd.
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Inventors:
ANZAI YUMIKO
MYAMURA YOSHINORI
ICHIKAWA MAGOI
HORIGOME SHINKICHI
FUKUYA HAJIME
OSHIMA MASAHIRO
NAKAO TAKESHI
OOTA NORIO
KAWAKUBO YOICHI
MYAMURA YOSHINORI
ICHIKAWA MAGOI
HORIGOME SHINKICHI
FUKUYA HAJIME
OSHIMA MASAHIRO
NAKAO TAKESHI
OOTA NORIO
KAWAKUBO YOICHI
Application Number:
JP18327787A
Publication Date:
October 30, 1996
Filing Date:
July 24, 1987
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G11B11/10; G11B7/254; G11B7/257; G11B7/26; G11B11/105; (IPC1-7): G11B11/10
Domestic Patent References:
| JP6369048A | ||||
| JP6369044A |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)