US5051340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Master for optical element replication
Assignee: Eastman Kodak Co
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Filing: 1989-06-23
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Granted: 1991-09-24
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Expires: 2009-06-23
Abstract
Abstract A master for the replication of optical elements is prepared by the steps of: (a) focusing an information modulated energy beam on a phase-change optical recording layer so as to form a pattern of two different phases in said layer corresponding to said information; and (b) selectively etching away one of said two different phases so as to form a relief pattern corresponding to said information. The master so made can be used directly as the stamper in the injection molding process or the 2-P process for the replication of optical elements.
Inventors
- 👤 Yuan S. Tyan
- 👤 Kee C. Pan
- 👤 George R. Olin
- 👤 Thomas Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:16
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; G11B7/261; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A method for forming a stamper for making replicate optical elements, said method comprising the steps of: a) focusing an information modulated energy beam on a phase-change optical recording layer so as to form a pattern of two different phases in said layer corresponding to said information; and b) selectively etching away one of said two different phases so as to form a relief pattern corresponding to said information; c) conductively coating the master produced in step b) and electroplating said conductive coating with nickel; and d) polishing and peeling the nickel layer formed in step c) from the surface of said master.
Claim 2
Independent Claim
103 words
A method for forming a stamper for making replicate optical elements, said method comprising the steps of: a) focusing an information modulated energy beam on a phase-change optical recording layer so as to form a pattern of two different phases in said layer corresponding to said information; and b) selectively etching away one of said two different phases so as to form a relief pattern corresponding to said information; c) conductively coating the master produced in step b) and electroplating said conductive coating with nickel; and d) polishing and peeling the nickel layer formed in step c) from the surface of said master.
Claim 3
Independent Claim
89 words
A method for making a replicate optical element comprising the steps of: a) focusing an information modulated energy beam on a phase-change optical recording layer so as to form a pattern of two different phases in said layer corresponding to said information; and b) selectively etching away one of said two different phases so as to form a relief pattern corresponding to said information; c) pressing the master formed in step b) into a polymer layer and photopolymerizing said polymer layer so form a replicate of said relief pattern.
Claim 4
Independent Claim
89 words
A method for making a replicate optical element comprising the steps of: a) focusing an information modulated energy beam on a phase-change optical recording layer so as to form a pattern of two different phases in said layer corresponding to said information; and b) selectively etching away one of said two different phases so as to form a relief pattern corresponding to said information; c) pressing the master formed in step b) into a polymer layer and photopolymerizing said polymer layer so form a replicate of said relief pattern.
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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) | 1994-09-23 | 1995-03-25 | 1995-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-23 | 1999-03-25 | 1999-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-23 | 2003-03-25 | 2003-09-24 | $7700.00 | Window Closed / Lapsed |