US5041356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing optical recording material
Assignee: Dai Nippon Printing Co Ltd
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Filing: 1989-08-28
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Granted: 1991-08-20
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Expires: 2009-08-28
Abstract
Abstract An optical recording material comprising (I) a substrate, (II) a recording layer provided on said substrate, the recording layer consisting of light transmissive portions and light screening portions, and (III) a reflective metallic thin film layer provided on the recording layer; as well as a process therefor. The invention also includes an optical card comprising the optical recording material provided on a card substrate. In the cases of the optical recording material and the optical card, it is possible to readily carry out high density recording, the alternation of written informaton is difficult, and the written information can be read out on a basis of the difference in light reflectivity.
Inventors
- 👤 Mitsuru Takeda
- 👤 Wataru Kuramochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:10
CPC Classifications
B; B42; B42D; B42D25/00; B42D25/30; B42D25/36; B42D25/373; B42D25/20; B42D25/23; B42D25/351; B42D25/40; B42D25/405; B42D25/415; B42D25/42; B42D25/43; B42D25/435; B42D25/45; B42D25/46; B42D25/465; B42D25/47; G; G06; G06K; G06K1/00; G06K1/12; G06K1/126; G06K19/00; G06K19/06; G06K19/06009; G06K19/06046; G07; G07F; G07F7/00; G07F7/08; G07F7/086; G11; G11B; G11B13/00; G11B7/00; G11B7/002; G11B7/0033; G11B7/004; G11B7/005; G11B7/0052; G11B7/24; G11B7/24003; G11B7/24012; G11B7/241; G11B7/242; G11B7/243; G11B7/2433; G11B7/244; G11B7/251; G11B7/252; G11B7/258; G11B7/26; G11B2007/24302; G11B2007/24306; G11B2007/24308; G11B2007/24312; G11B2007/24316; G11B7/245; G11B7/246; G11B7/2467; G11B7/249; G11B7/253; G11B7/2533; G11B7/2535; G11B7/256; G11B7/2585; G11B7/259; G11B7/2595; Y; Y10; Y10S; Y10S283/00; Y10S283/904; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24876; Y10T428/24893
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
A process for preparing an optical recording material, comprising the steps of: applying a photosensitive material for a first recording layer onto a substrate, said photosensitive material comprising (i) a transparent resin as a binder, (ii) a photodecomposable development restrainer having a diazo or azido group, and (iii) a reducible metal complex compound or a metal compound which is reduced to form metal nuclei; imagewise exposing the substrate provided with said photosensitive material applied thereon; developing the thus exposed photosensitive material to form the first recording layer; forming a reflective metallic thin film layer for a second recording layer on said first recording layer; and irradiating only the thus formed reflective metallic thin film layer with an energy beam to provide recording spots therein to form the second recording layer.
Claim 2
Dependent Claim
130 words
A process for preparing an optical recording material, comprising the steps of: applying a photosensitive material for a first recording layer onto a substrate, said photosensitive material comprising (i) a transparent resin as a binder, (ii) a photodecomposable development restrainer having a diazo or azido group, and (iii) a reducible metal complex compound or a metal compound which is reduced to form metal nuclei; imagewise exposing the substrate provided with said photosensitive material applied thereon; developing the thus exposed photosensitive material to form the first recording layer; forming a reflective metallic thin film layer for a second recording layer on said first recording layer; and irradiating only the thus formed reflective metallic thin film layer with an energy beam to provide recording spots therein to form the second recording layer.
Claim 3
Dependent Claim
28 words
The process of claim 1, wherein said metal compound comprises a water-soluble salt of a metal selected from the group consisting of Ni, Co, Fe, Cr, And Cu.
Claim 4
Dependent Claim
39 words
The process of claim 1, wherein said metal compound is at least one member selected from the group consisting of halide, sulfate and nitrate of a metal selected from the group consisting of Ni, Co, Fe, Cr, and Cu.
Claim 5
Dependent Claim
15 words
The process of claim 1, wherein said metal compound is a water-soluble salt of Ni.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |