US4534016A
Expired / Lapsed
US
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Beam addressed memory system
Assignee: United States, UNITED STATES AIR FORCE THE, Secretary of
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Filing: 1983-07-08
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Granted: 1985-08-06
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Expires: 2003-07-08
Abstract
Abstract A beam-addressed memory system for digital memory recording and reading which comprises an electron beam generating and focusing subsystem, an electron detecting subsystem, electronic control and interface circuit means, and a storage medium consisting essentially of a cross-linkable polymeric film having an implanted surface layer of heavy metal ions.
Inventors
- 👤 Conilee G. Kirkpatrick
- 👤 Michael S. Adler
- 👤 George E. Possin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:09
CPC Classifications
G; G11; G11B; G11B9/00; G11B9/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
63 words
A beam addressed memory system for digital memory recording and reading which comprises electron beam generating and focusing means, electron detecting means, a data storage medium, means for positioning said storage medium, a vacuum chamber, and electronic control and interface circuit means, wherein said data storage medium consists essentially of a crosslinkable polymeric film having an implanted surface layer of heavy metal ions.
Claim 2
Dependent Claim
63 words
A beam addressed memory system for digital memory recording and reading which comprises electron beam generating and focusing means, electron detecting means, a data storage medium, means for positioning said storage medium, a vacuum chamber, and electronic control and interface circuit means, wherein said data storage medium consists essentially of a crosslinkable polymeric film having an implanted surface layer of heavy metal ions.
Claim 3
Dependent Claim
11 words
The system of claim 1 wherein said polymeric film is polymethylmethacrylate.
Claim 4
Dependent Claim
17 words
The system of claim 1 wherein said metal ions have a density of at least 10 g/cc.
Claim 5
Dependent Claim
17 words
The system of claim 3 wherein said metal ions have a density of at least 15 g/cc.
Claim 6
Dependent Claim
17 words
The system of claim 4 wherein said metal ions have a density of at least 19 g/cc.
Claim 7
Dependent Claim
22 words
The system of claim 3 wherein said metal is selected from the group consisting of Au, Pt, Ir, Os, W, and Mo.
Claim 8
Dependent Claim
23 words
The system of claim 2 wherein said metal ions are implanted to fluences between 10 16 and 10 18 ions per square centimeter.
Claim 9
Dependent Claim
21 words
The system of claim 2 wherein said implanted surface layer has a thickness in the range of 0.05 to 0.5 microns.
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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |