Patent US2844531A successfully refreshed from Google Patents.
US2844531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing cavities in semiconductive surfaces
Assignee: AT&T Inc
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Filing: 1954-05-24
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Granted: 1958-07-22
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Expires: 1974-05-24
Abstract
No abstract record available.
Inventors
- 👤 Morton B Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:38
CPC Classifications
C; C25; C25F; C25F3/00; C25F3/02; C25F3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF PRODUCING A LOCALIZED CAVITY OF A PRESCRIBED PERIPHERAL CONFIGURATION IN A SEMICONDUCTIVE BODY WHICH COMPRISES MOUNTING AN ELECTRODE OF A MATERIAL MORE NOBLE THAN SAID BODY MATERIAL AGAINST THE SURFACE OF THE BODY COINCIDENT WITH THE DESIRED LOCATION OF THE CAVITY, SAID ELECTRODE HAVING A CONFIGURATION PARALLEL TO AND ADJACENT SAID BODY SURFACE CORRESPONDING TO THAT OF SAID CAVITY PERIPHERY AND FURTHERMORE HAVING A SHAPE SUCH THAT THE MAXIMUM AREA OF SAID SURFACE INITIALLY CONTACTED BY SAID ELECTRODE IS EQUIVALENT TO THE AREA OF A CIRCLE .50 MILS IN DIAMETER, APPLYING PRESSURE TO SAID ELECTRODE IN A DIRECTION NORMAL TO SAID SURFACE THEREBY MAINTAINING SAID ELECTRODE IN CONTACT WITH SAID SURFACE, AND IMMERSING THE SURFACE AND ELECTRODE IN THE VICINITY OF AND INCLUDING THE REGIONS OF CONTACT BETWEEN THE ELECTRODE AND THE BODY IN AN ELECTROLYTE IN WHICH THE PRODUCT OF THE ELECTROCHEMICAL REACTION AT THE BODY-ELECTROLYTE INTERFACE IS SOLUBLE TO FORM A GALVANIC COUPLE.
Claim 2
Independent Claim
158 words
THE METHOD OF PRODUCING A LOCALIZED CAVITY OF A PRESCRIBED PERIPHERAL CONFIGURATION IN A SEMICONDUCTIVE BODY WHICH COMPRISES MOUNTING AN ELECTRODE OF A MATERIAL MORE NOBLE THAN SAID BODY MATERIAL AGAINST THE SURFACE OF THE BODY COINCIDENT WITH THE DESIRED LOCATION OF THE CAVITY, SAID ELECTRODE HAVING A CONFIGURATION PARALLEL TO AND ADJACENT SAID BODY SURFACE CORRESPONDING TO THAT OF SAID CAVITY PERIPHERY AND FURTHERMORE HAVING A SHAPE SUCH THAT THE MAXIMUM AREA OF SAID SURFACE INITIALLY CONTACTED BY SAID ELECTRODE IS EQUIVALENT TO THE AREA OF A CIRCLE .50 MILS IN DIAMETER, APPLYING PRESSURE TO SAID ELECTRODE IN A DIRECTION NORMAL TO SAID SURFACE THEREBY MAINTAINING SAID ELECTRODE IN CONTACT WITH SAID SURFACE, AND IMMERSING THE SURFACE AND ELECTRODE IN THE VICINITY OF AND INCLUDING THE REGIONS OF CONTACT BETWEEN THE ELECTRODE AND THE BODY IN AN ELECTROLYTE IN WHICH THE PRODUCT OF THE ELECTROCHEMICAL REACTION AT THE BODY-ELECTROLYTE INTERFACE IS SOLUBLE TO FORM A GALVANIC COUPLE.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |