US3775274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic anticompromise process
Assignee: Raytheon Co
•
Filing: 1970-06-30
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Granted: 1973-11-27
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Expires: 1990-06-30
Abstract
Abstract Microelectronic devices and circuits, such as are found in semiconductor and hybrid microelectronics, are rendered unrecognizable and are destructed by means of an electrochemical reaction comprising an electrochemical or chemical etching and/or de-plating process.
Inventors
- 👤 J Rust
- 👤 G Smolker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:52
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/12; F; F41; F41H; F41H13/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A method as in claim 1 wherein said step includes the steps of utilizing an electrolyte contactable with the device, utilizing the device as an anode, and applying electrical power to a cathode and the device through the electrolyte to create acid at the anode in a nascent, highly active state.
Claim 2
Dependent Claim
30 words
A method as in claim 2 further comprising the step of utilizing a means at the cathode for confining alkali produced at the cathode in the neighborhood of the cathode.
Claim 3
Dependent Claim
16 words
A method as in claim 2 further comprising the step of inhibiting neutralization of the electrolyte.
Claim 4
Dependent Claim
16 words
A method as in claim 1 wherein said step comprises the step of etching the device.
References Cited (Backward Citations)
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US2884313A
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US2944926A
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FR1284532A
Cited
US3346477A
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US3476660A
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |