US4876222A
Expired / Lapsed
US
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Semiconductor passivation
Assignee: DRS Infrared Technologies LP
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Filing: 1988-09-28
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Granted: 1989-10-24
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Expires: 2008-09-28
Abstract
Abstract A method of passivation of Hg1-xCdxTe and similar semiconductors by chemical reaction to either sulfide or selenide or a combination of both with an oxidizer such as polysulfide or polyselenide ions in solution.
Inventors
- 👤 Joseph D. Luttmer
- 👤 D. Dawn Little
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:33
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
A method of passivating a Hg 1-x Cd x Te substrate, comprising the step of: (a) growing a passivating layer on said substrate by chemical reaction in the absence of an applied electrochemical current in a solution containing ions from the group consisting polysulfide, polyselenide, and a combination of the two.
Claim 2
Independent Claim
51 words
A method of passivating a Hg 1-x Cd x Te substrate, comprising the step of: (a) growing a passivating layer on said substrate by chemical reaction in the absence of an applied electrochemical current in a solution containing ions from the group consisting polysulfide, polyselenide, and a combination of the two.
Claim 3
Dependent Claim
11 words
The method of claim 1, wherein: (a) said solution includes water.
Claim 4
Dependent Claim
12 words
The method of claim 1, wherein: (a) said solution includes ethylene glycol.
Claim 5
Dependent Claim
31 words
The method of claim 1, wherein: (a) said ions are provided by a member of the group consisting of alkali polysulfides, alkali polyselenides, and a combination of alkali polysulfides and polyselenides.
References Cited (Backward Citations)
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JPS5956126A
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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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |