Patent US4397923A successfully refreshed from Google Patents.
US4397923A
Expired / Lapsed
US
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Method of manufacturing an optical recording element
Assignee: Toshiba Corp
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Filing: 1981-06-16
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Granted: 1983-08-09
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Expires: 2001-06-16
Abstract
Abstract An optical recording element which comprises a heat-resistant organic resin substrate; a recording layer formed on said substrate by thermal deposition or sputtering; and a transparent organic resin protective layer mounted on the recording layer, and wherein the organic resin substrate and organic resin protective layer are thermally fixed under pressure with the recording layer laid between them.
Inventors
- 👤 Nobuaki Yasuda
- 👤 Yoshinori Fujimori
- 👤 Masaaki Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:18
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/254; G11B7/2542; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24316; G11B7/253; G11B7/2533; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31721; Y10T428/31786
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A method of manufacturing an optical recording element, which comprises the steps of: preparing a heat-resistant organic resin substrate sheet; taking said substrate sheet into a vacuum chamber; forming a recording layer on said substrate sheet by sputtering in said vacuum chamber; preparing a transparent organic resin protective sheet having a softening point less than or equal to the softening point of said heat-resistant organic resin substrate sheet; taking said protective sheet into said vacuum chamber; thermally pressing said protective sheet against said recording layer in said vacuum chamber to form a thermally laminated sheet mass; taking said thermally laminated sheet mass out of said vacuum chamber; and cutting said thermally laminated sheet mass into a prescribed form.
Claim 2
Independent Claim
118 words
A method of manufacturing an optical recording element, which comprises the steps of: preparing a heat-resistant organic resin substrate sheet; taking said substrate sheet into a vacuum chamber; forming a recording layer on said substrate sheet by sputtering in said vacuum chamber; preparing a transparent organic resin protective sheet having a softening point less than or equal to the softening point of said heat-resistant organic resin substrate sheet; taking said protective sheet into said vacuum chamber; thermally pressing said protective sheet against said recording layer in said vacuum chamber to form a thermally laminated sheet mass; taking said thermally laminated sheet mass out of said vacuum chamber; and cutting said thermally laminated sheet mass into a prescribed form.
Claim 3
Dependent Claim
23 words
The method according to claim 1, wherein said heat-resistant organic resin substrate sheet is prepared from one of polyimide resins and fluorine-contained resins.
Claim 4
Dependent Claim
17 words
The method according to claim 1, wherein said recording layer is prepared wholly or mainly from tellurium.
Claim 5
Dependent Claim
23 words
The method according to claim 1, wherein said transparent organic resin protective sheet is prepared from one of polyester resins and fluorine-contained resins.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |