JPS6368128U - - Google Patents

Info

Publication number
JPS6368128U
JPS6368128U JP16216686U JP16216686U JPS6368128U JP S6368128 U JPS6368128 U JP S6368128U JP 16216686 U JP16216686 U JP 16216686U JP 16216686 U JP16216686 U JP 16216686U JP S6368128 U JPS6368128 U JP S6368128U
Authority
JP
Japan
Prior art keywords
magneto
optical disk
plastic substrate
signal recording
optical
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.)
Granted
Application number
JP16216686U
Other languages
Japanese (ja)
Other versions
JPH0743777Y2 (en
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 filed Critical
Priority to JP1986162166U priority Critical patent/JPH0743777Y2/en
Publication of JPS6368128U publication Critical patent/JPS6368128U/ja
Application granted granted Critical
Publication of JPH0743777Y2 publication Critical patent/JPH0743777Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本考案の光磁気デイスクに使用され
るプラスチツク基板の実施例の構造を示す模式的
な平面図、第２図は従来の構造を示す第１図と同
様の図、第３図は製作した光磁気デイスクの耐久
性を試験するためのヒートサイクルのパターンで
ある。 １…基板の外形、１′…基板中心部の孔の外形
、２…プリグルーブ部の外形、２′…プリグルブ
部の内形、３…製膜部の外形、３′…製膜部の内
形。 FIG. 1 is a schematic plan view showing the structure of an embodiment of the plastic substrate used in the magneto-optical disk of the present invention, FIG. 2 is a view similar to FIG. 1 showing the conventional structure, and FIG. is a heat cycle pattern for testing the durability of the manufactured magneto-optical disk. 1... Outer shape of the substrate, 1'... Outer shape of the hole in the center of the substrate, 2... Outer shape of the pre-groove part, 2'... Inner shape of the pre-groove part, 3... Outer shape of the film forming part, 3'... Inner shape of the film forming part shape.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] プラスチツク基板上に形成された光磁気記録媒
体層に光ビームを照射して情報の書き込みおよび
読み出しを行なう光磁気デイスクにおいて、前記
プラスチツク基板の製膜部分が、信号記録部分で
あるプリグルーブ部と十点平均粗さで表わされる
表面粗さが０．０４μｍ以上である信号記録部分
でない粗面部とからなる光磁気デイスク。 In a magneto-optical disk in which information is written and read by irradiating a light beam onto a magneto-optical recording medium layer formed on a plastic substrate, the film-formed portion of the plastic substrate is in contact with a pregroove portion which is a signal recording portion. A magneto-optical disk comprising a rough surface portion, which is not a signal recording portion, and has a surface roughness expressed by point average roughness of 0.04 μm or more.
JP1986162166U 1986-10-24 1986-10-24 Magneto-optical disk Expired - Lifetime JPH0743777Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1986162166U JPH0743777Y2 (en) 1986-10-24 1986-10-24 Magneto-optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1986162166U JPH0743777Y2 (en) 1986-10-24 1986-10-24 Magneto-optical disk

Publications (2)

Publication Number Publication Date
JPS6368128U true JPS6368128U (en) 1988-05-09
JPH0743777Y2 JPH0743777Y2 (en) 1995-10-09

Family

ID=31089171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1986162166U Expired - Lifetime JPH0743777Y2 (en) 1986-10-24 1986-10-24 Magneto-optical disk

Country Status (1)

Country Link
JP (1) JPH0743777Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62153625U (en) * 1987-02-12 1987-09-29
JPS62252547A (en) * 1986-04-24 1987-11-04 Fuji Photo Film Co Ltd Magneto-optical disk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62252547A (en) * 1986-04-24 1987-11-04 Fuji Photo Film Co Ltd Magneto-optical disk
JPS62153625U (en) * 1987-02-12 1987-09-29

Also Published As

Publication number Publication date
JPH0743777Y2 (en) 1995-10-09

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