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EP0350010A2
Expired / Lapsed
EP
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Magneto-optical recording medium
Assignee: Oki Electric Industry Co Ltd
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Filing: 1989-07-05
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Granted: —
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Expires: 2009-07-05
Abstract
Abstract The present invention relates to magneto-optical recording medium. The recordin medium comprises a magnetic film (45) and a reflective film (117) both provided on a substrate (11). The reflective film 15 made of aluminum and titanium added thereto, or aluminum and copper added thereto. In case of the reflective film made of aluminum and copper, copper addition rate is in the range of 25 - 70 atomic % based on the total amount of aluminum and copper. The magneto-optical recording medium gives excellent CN ratio and recording sensitivity.
Inventors
- 👤 Yoshinori Oki Electric Industry Co. Ltd. Maeno
- 👤 Masanobu Oki Electric Industry Co. Ltd Kobayashi
- 👤 Kayoko Oki Electric Industry Co. Ltd Oishi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 11:57
CPC Classifications
G; G11; G11B; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
29 words
A magneto-optical recording medium comprising a magnetic film and a reflective film both provided on a substrate, wherein said reflective film is made of aluminum and titanium added thereto.
Claim 2
Dependent Claim
29 words
A magneto-optical recording medium comprising a magnetic film and a reflective film both provided on a substrate, wherein said reflective film is made of aluminum and titanium added thereto.
Claim 3
Dependent Claim
38 words
A magneto-optical recording medium as claimed in claim 1, wherein the amount of titanium added to aluminum is in the range of 2 to 50 atomic % based on the total amount of said aluminum and said titanium.
Claim 4
Dependent Claim
25 words
A magneto-optical recording medium as claimed in claim 1, wherein the thickness of said reflective film is in the range of 200 to 500 Å.
Claim 5
Dependent Claim
38 words
A magneto-optical recording medium as claimed in claim 1, which further comprises a first protective film provided between said substrate and said magnetic film, and a second protective film provided between said magnetic film and said reflective film.
Claim 6
Dependent Claim
39 words
A magneto-optical recording medium as claimed in claim 1, which further comprises a first protective film provided between said substrate and said magnetic film, and a second protective film provided on said reflective film provided on said magnetic film.
Claim 7
Dependent Claim
49 words
A magneto-optical recording medium comprising a magnetic film and a reflective film both provided on a substrate, wherein said reflective film is made of aluminum and copper added thereto in an amount of 25 to 70 atomic % based on the total amount of said aluminum and said copper.
Claim 8
Dependent Claim
49 words
A magneto-optical recording medium comprising a magnetic film and a reflective film both provided on a substrate, wherein said reflective film is made of aluminum and copper added thereto in an amount of 25 to 70 atomic % based on the total amount of said aluminum and said copper.
Claim 9
Dependent Claim
25 words
A magneto-optical recording medium as claimed in claim 6, wherein the thickness of said reflective film is in the range of 200 to 500 Å.
Claim 10
Dependent Claim
38 words
A magneto-optical recording medium as claimed in claim 6, which further comprises a first protective film provided between said substrate and said magnetic film, and a second protective film provided between said magnetic film and said reflective film.
Claim 11
Dependent Claim
39 words
A magneto-optical recording medium as claimed in claim 6, which further comprises a first protective film provided between said substrate and said magnetic film, and a second protective film provided on said reflective film provided on said magnetic film.
References Cited (Backward Citations)
No citation records indexed.
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