Patent US4433342A successfully refreshed from Google Patents.
US4433342A
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Amorphous switching device with residual crystallization retardation
Assignee: Harris Corp
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Filing: 1981-04-06
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Granted: 1984-02-21
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Expires: 2001-04-06
Abstract
Abstract A residual crystallization retardation layer is provided between the non-crystalline switchable semiconductor layer and each electrode structure. Amorphous germanium, silicon or carbon form good crystallization retardation layers and also minimize electromigration and reduce solubility of tellurium in the electrodes.
Inventors
- 👤 Vipin N. Patel
- 👤 John L. Conarroe, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:34
CPC Classifications
H; H10; H10N; H10N70/00; H10N70/20; H10N70/231; H10N70/801; H10N70/821; H10N70/826; H10N70/881; H10N70/882; H10N70/8828; Y; Y10; Y10S; Y10S257/00; Y10S257/928
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
An amorphous semiconductor device switchable from a high resistance amorphous state to a low resistance crystalline state comprising: a pair of electrode structures; a layer of amorphous germanium telluride forming the switchable layer between said pair of electrode structures; and a thin retarding layer of amorphous germanium material between said germanium telluride layer and each electrode structure.
Claim 2
Dependent Claim
57 words
An amorphous semiconductor device switchable from a high resistance amorphous state to a low resistance crystalline state comprising: a pair of electrode structures; a layer of amorphous germanium telluride forming the switchable layer between said pair of electrode structures; and a thin retarding layer of amorphous germanium material between said germanium telluride layer and each electrode structure.
Claim 3
Dependent Claim
23 words
The amorphous semiconductor device according to claim 1 wherein each retarding layer has a thickness in the range of 20 to 500 angstroms.
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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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |