JPS641135A - Master disk for optical disk - Google Patents

Master disk for optical disk

Info

Publication number
JPS641135A
JPS641135A JP15708087A JP15708087A JPS641135A JP S641135 A JPS641135 A JP S641135A JP 15708087 A JP15708087 A JP 15708087A JP 15708087 A JP15708087 A JP 15708087A JP S641135 A JPS641135 A JP S641135A
Authority
JP
Japan
Prior art keywords
specular
face
metallic mold
master disk
disk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15708087A
Other languages
Japanese (ja)
Other versions
JPH011135A (en
Inventor
Masabumi Ototake
Koji Shindo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP15708087A priority Critical patent/JPS641135A/en
Publication of JPH011135A publication Critical patent/JPH011135A/en
Publication of JPS641135A publication Critical patent/JPS641135A/en
Pending legal-status Critical Current

Links

Landscapes

  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE: To obviate the generation of flaws in a master disk and metallic mold with a smaller number of injection times and to increase the service lifetime of both by providing an information recording face and a specular face which is so worked as to form prescribed slight recesses on the surface.
CONSTITUTION: The information recording surface 2 which is transferred to an optical disk substrate 1 provided between the same and a 1st metallic mold and the specular face 7 which is imposed on the 2nd metallic mold having the specular face 7 and is so worked as to form the prescribed slight recesses on the surface are provided. Namely, the prescribed slight recesses formed on the specular surface 7 of the master disk 1 decrease the contact area of the master disk 1 and the specular face 7 of the metallic mold in contact therewith, thereby lessening the adhesion between both and the generation of flaws between both by repetition of friction. The generation of the flaws on the specular face of the metallic mold and the worked specular face 7 of the master disk 1 is thereby prevented and the lifetime of both is increased.
COPYRIGHT: (C)1989,JPO&Japio
JP15708087A 1987-06-23 1987-06-23 Master disk for optical disk Pending JPS641135A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15708087A JPS641135A (en) 1987-06-23 1987-06-23 Master disk for optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15708087A JPS641135A (en) 1987-06-23 1987-06-23 Master disk for optical disk

Publications (2)

Publication Number Publication Date
JPH011135A JPH011135A (en) 1989-01-05
JPS641135A true JPS641135A (en) 1989-01-05

Family

ID=15641809

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15708087A Pending JPS641135A (en) 1987-06-23 1987-06-23 Master disk for optical disk

Country Status (1)

Country Link
JP (1) JPS641135A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924024B4 (en) * 1998-05-27 2008-06-19 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Kobe Continuous kneading machine, rotor used therein and use of the rotor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924024B4 (en) * 1998-05-27 2008-06-19 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.), Kobe Continuous kneading machine, rotor used therein and use of the rotor

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