CA1209698A
Expired / Lapsed
CA
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Magneto-optic memory device
Assignee: Sharp Corp
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Filing: 1983-04-29
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Granted: 1986-08-12
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Expires: 2003-04-29
Abstract
Abstract ABSTRACT OF THE DISCLOSURE A magneto-optic memory device comprises a re-cording medium deposited (for example, by sputtering) on a substrate, a transparent dielectric film formed over the recording medium, and, preferably, a reflecting film deposited on the transparent dielectric film. This ar-rangement inhibits oxidation of the recording medium, and stabilizes the coercive force characteristics and information recording characteristics of the recording medium.
Inventors
- 👤 Hideyoshi Yamaoka
- 👤 Kenji Ohta
- 👤 Akira Takahashi
- 👤 Junji Hirokane
- 👤 Hiroyuki Katayama
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-06 08:28
CPC Classifications
G; G11; G11B; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; G11B11/10589; G11B11/10591; C; C23; C23C; C23C14/00; C23C14/06; C23C14/0617; C23C14/0641; C23C14/0652; G11B11/10584; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B7/252; G11B7/257; G11B7/258; G11B2007/24302; G11B2007/24306; G11B2007/24308; G11B2007/24314; G11B2007/24316; G11B2007/24318; G11B2007/2432; G11B2007/24328; G11B2007/25705; G11B2007/25706; G11B2007/25708; G11B2007/2571; G11B2007/25713; G11B2007/25718; G11B7/253; G11B7/2531; G11B7/2533; G11B7/2534; G11B7/2585; G11B7/259; G11B7/2595; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
34 words
An optical memory device comprising a sub-strate, a film of an optical memory recording medium formed on said substrate, and a dielectric film which is free of oxygen content formed on said recording medium.
Claim 2
Dependent Claim
34 words
An optical memory device comprising a sub-strate, a film of an optical memory recording medium formed on said substrate, and a dielectric film which is free of oxygen content formed on said recording medium.
Claim 3
Dependent Claim
32 words
An optical memory device as defined in claim 1, wherein said dielectric film comprises a nitride film made of a material selected from the group consisting of aluminum nitride and silicon nitride.
Claim 4
Dependent Claim
26 words
An optical memory device as defined in claim 1, wherein said dielectric film is made of at least one of MgF2, ZnS, CeF3, AlF3?3NaF, and Si3N4.
Claim 5
Dependent Claim
32 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of material select-ed from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin.
Claim 6
Dependent Claim
21 words
An optical memory device as defined in claim 1, 2 or 3, including a reflecting film formed on said dielectric film.
Claim 7
Dependent Claim
38 words
An optical memory device as defined in claim 1, 2 or 3, including a reflecting film formed on said dielectric film made of at least one component selected from the group comprising stainless steel, Ni, Ti and TiN.
Claim 8
Dependent Claim
36 words
An optical memory device as defined in claim 1, 2, or 3 including a reflecting film formed on said dielectric film made of a material selected from the group consisting of Cu, Ag, Al and Au.
Claim 9
Dependent Claim
42 words
An optical memory device as defined in claim 1, 2 or 3, wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and expoxy resin and including a reflecting film formed on said dielectric film.
Claim 10
Dependent Claim
58 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin including a reflecting film formed on said dielectric film made of at least one component selected from the group comprising stainless steel, Ni, Ti and TiN.
Claim 11
Dependent Claim
56 words
An optical memory device as defined in claim 1, 2 or 3, wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin including a reflecting film formed on said dielectric film made of a material selected from the group consisting of Cu, Ag, Al and Au.
Claim 12
Dependent Claim
40 words
An optical memory device as defined in claim 1, 2, or 3 in which said optical memory recording medium is made of a material selected from the group consisting of TeOx(0?x<1), TeC and TeSe, with Te being a main com-ponent.
Claim 13
Dependent Claim
31 words
An optical memory device as defined in claim 1, 2, or 3, in which said optical memory recording medium comprises a magneto-optic memory medium made of a rare earth transition metal.
Claim 14
Dependent Claim
36 words
An optical memory device as defined in claim 1, 2 or 3, in which said optical memory medium comprises a magneto-optic memory medium made of a material selected from the group consisting of MnBi and MnBiCu.
Claim 15
Dependent Claim
61 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin, and in which said optical memory recording medium is made of a material selected from the group consisting of TeOx(0?x<1), TeC and TeSe with Te being a main component.
Claim 16
Dependent Claim
52 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin, and in which said optical memory recording medium comprises a magneto-optic memory medium made of a rare earth transition metal.
Claim 17
Dependent Claim
57 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin, and in which said optical memory medium comprises a magneto-optic memory medium made of a material selected from the group consisting of MnBi and MnBiCu.
Claim 18
Dependent Claim
71 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin, and including a reflecting film formed on said dielectric film, and in which said optical memory recording medium is made of a material selected from the group consisting of TeOx(0?x<1), TeC, and TeSe, with Te being a main component.
Claim 19
Dependent Claim
79 words
An optical memory device as defined in claim 1, 2, or 3 wherein said substrate is made of a material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin, including a reflecting film formed on said dielectric film made of at least one component selected from the group comprising stainless steel, Ni, Ti and TiN, and in which said optical memory recording medium comprises a magneto-optic memory medium made of a rare earth transition metal.
Claim 20
Dependent Claim
81 words
An optical memory device as defined in claim 1, 2, or 3, wherein said substrate is made of material selected from the group consisting of glass, polycarbonate, acrylic resin and epoxy resin, including a reflecting film formed on said dielectric film made of a material selected from the group consisting of Cu, Ag, Al and Au, and in which said optical memory medium comprises a magneto-optic memory medium made of a material selected from the group consisting of MnBi and MnBiCu.
Claim 21
Dependent Claim
27 words
An optical memory device as defined in claim 1, 2, or 3 including a dielectric film free of oxygen content between said substrate and said recording medium.
References Cited (Backward Citations)
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