Patent US4018937A successfully refreshed from Google Patents.
US4018937A
Expired / Lapsed
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Electron beam recording comprising polymer of 1-methylvinyl methyl ketone
Assignee: RCA Corp
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Filing: 1975-08-14
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Granted: 1977-04-19
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Expires: 1995-08-14
Abstract
Abstract Recording medium comprising a film of a polymer of 1-methylvinyl methyl ketone on a support is suitable for recording information with electron beams. This recording medium has high resolution and good sensitivity.
Inventors
- 👤 Aaron William Levine
- 👤 Michael Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:38
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/039; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
In a method of recording information whereby a modulated beam of electrons is scanned across a surface of a resist material which becomes more soluble in a developer solvent when impinged upon by the beam of electrons and the resist material is developed with the developer solvent so as to remove the solubilized portions thereof, the improvement which comprises employing as the resist material a polymer of 1-methylvinyl methyl ketone.
Claim 2
Dependent Claim
70 words
In a method of recording information whereby a modulated beam of electrons is scanned across a surface of a resist material which becomes more soluble in a developer solvent when impinged upon by the beam of electrons and the resist material is developed with the developer solvent so as to remove the solubilized portions thereof, the improvement which comprises employing as the resist material a polymer of 1-methylvinyl methyl ketone.
Claim 3
Dependent Claim
15 words
A method according to claim 1 wherein the polymer is a 1-methylvinyl methyl ketone homopolymer.
Claim 4
Dependent Claim
22 words
A method according to claim 1 wherein the polymer is a copolymer of 1-methylvinyl methyl ketone and a comonomer having vinyl unsaturation.
Claim 5
Dependent Claim
22 words
A method according to claim 3 wherein the polymer is a copolymer of 1-methylvinyl methyl ketone and an acrylate or methacrylate monomer.
Claim 6
Dependent Claim
18 words
A method according to claim 4 wherein the copolymer is derived from 1-methylvinyl vinyl ketone and ethyl acrylate.
Claim 7
Dependent Claim
15 words
A method according to claim 1 wherein the polymer is on an electrically conductive substrate.
Claim 8
Dependent Claim
15 words
A method according to claim 1 wherein the polymer has an electrically conductive layer thereon.
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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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |