US4716063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Information recording disk
Assignee: Canon Inc
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Filing: 1985-10-21
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Granted: 1987-12-29
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Expires: 2005-10-21
Abstract
Abstract An information recording disk has a transparent support substrate and a transfer layer formed thereon using a stamper. The transfer layer comprises a precursor having as major components a cycloacetal compound having at least two polymerizable unsaturated groups, a compound having at least two mercapto groups, and an acrylic ester and/or methacrylic ester.
Inventors
- 👤 Haruo Uehara
- 👤 Hiroshi Omata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:09
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0057; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; G11B5/00; G11B5/84; G11B7/00; G11B7/24; G11B7/26; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S430/00; Y10S430/146; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31576
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
95 words
An information recording disk prepared by a method wherein a liquid precursor is held between an information recording disk mold and a transparent support substrate and is cured to form a resin transfer layer integrally with the transparent support substrate, and the information pattern on the mold is transferred to the resin transfer layer, characterized in that the resin precursor used in the resin transfer layer comprises a major components a cycloacetal compound having at least two polymerizable unsaturated groups, a compound having at least two mercapto groups, and an acrylic ester and/or methacrylic ester.
Claim 2
Dependent Claim
95 words
An information recording disk prepared by a method wherein a liquid precursor is held between an information recording disk mold and a transparent support substrate and is cured to form a resin transfer layer integrally with the transparent support substrate, and the information pattern on the mold is transferred to the resin transfer layer, characterized in that the resin precursor used in the resin transfer layer comprises a major components a cycloacetal compound having at least two polymerizable unsaturated groups, a compound having at least two mercapto groups, and an acrylic ester and/or methacrylic ester.
Claim 3
Dependent Claim
31 words
The disk according to claim 1, wherein at least a surface of the support substrate which is in contact with the transfer resin layer is pretreated with a silane coupling agent.
Claim 4
Dependent Claim
47 words
The disk according to claim 1, wherein the amount of the acrylic ester and/or methacrylic ester ranges from 30 parts by weight to 300 parts by weight based on 100 parts by weight of the total of the cycloacetal compound and the compound having the mercapto groups.
Claim 5
Dependent Claim
14 words
The disk according to claim 1, wherein the resin precursor comprises an ultraviolet-curing resin.
Claim 6
Dependent Claim
14 words
The disk according to claim 1, wherein the resin precursor comprises a thermal-curing resin.
Claim 7
Dependent Claim
17 words
The disk according to claim 1, wherein an optomagnetic recording layer is formed on the transfer layer.
References Cited (Backward Citations)
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Cited
JPS5656857A
Cited
JPS56116002A
Cited
US4342863A
Cited
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Cited
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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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |