CA2045364A1 - Magneto-optical disc - Google Patents

Magneto-optical disc

Info

Publication number
CA2045364A1
CA2045364A1 CA 2045364 CA2045364A CA2045364A1 CA 2045364 A1 CA2045364 A1 CA 2045364A1 CA 2045364 CA2045364 CA 2045364 CA 2045364 A CA2045364 A CA 2045364A CA 2045364 A1 CA2045364 A1 CA 2045364A1
Authority
CA
Canada
Prior art keywords
magneto
optical disc
recording
opticalmagnetic
recording layer
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
CA 2045364
Other languages
French (fr)
Other versions
CA2045364C (en
Inventor
Tadao Yoshida
Takashi Ohmori
Hirotoshi Fujisawa
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Publication of CA2045364A1 publication Critical patent/CA2045364A1/en
Application granted granted Critical
Publication of CA2045364C publication Critical patent/CA2045364C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

A magneto-optical disc having an opticalmagnetic recording layer formed on the surface of a transparent base plate opposite to its beam incident surface. A layer excellent in lubriciousness is formed in superimposition on the opticalmagnetic recording layer to enable the magnetic head to be in direct sliding contact with the disc surface to provide for stable recording and improved recording performance as well as to reduce adverse effects caused by deposition of foreign matter such as dust and dirt.
CA 2045364 1990-07-06 1991-06-25 Magneto-optical disc Expired - Lifetime CA2045364C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JPP177251/90 1990-07-06
JP17725190 1990-07-06
JPP312618/90 1990-11-20
JP31261890A JPH04176038A (en) 1990-07-06 1990-11-20 Magneto-optical disk

Publications (2)

Publication Number Publication Date
CA2045364A1 true CA2045364A1 (en) 1992-01-07
CA2045364C CA2045364C (en) 2000-03-28

Family

ID=26497860

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2045364 Expired - Lifetime CA2045364C (en) 1990-07-06 1991-06-25 Magneto-optical disc

Country Status (2)

Country Link
JP (1) JPH04176038A (en)
CA (1) CA2045364C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1170196A (en) * 1996-06-10 1998-01-14 索尼株式会社 Photomagnetic recording medium and film

Also Published As

Publication number Publication date
JPH04176038A (en) 1992-06-23
CA2045364C (en) 2000-03-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKEC Expiry (correction)

Effective date: 20121202