US3361597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a photodiode
Assignee: AT&T Inc
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Filing: 1963-12-20
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Granted: 1968-01-02
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Expires: 1983-12-20
Abstract
No abstract record available.
Inventors
- 👤 William M Sharpless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:06
CPC Classifications
H; H10; H10F; H10F10/00; H10F10/10; H10F10/11; H10F99/00; H10F71/00; H10F71/134; H10F71/135; Y; Y10; Y10S; Y10S148/00; Y10S148/071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF FORMLING A PHOTODIODE HAVING A SEMICONDUCTIVE REGION WITH FIRST AND SECOND OPPOSITELY DISPOSED SURFACES AND A POINT CONTACT POSITIONED ON SAID FIRST SURFACE, SAID DIODE BEING DESIGNED FOR OPERATION WITHIN A GIVEN RANGE OF OPERATING CURRENTS; COMPRISING THE STEPS OF APPLYING AN APPROPRIATE NEGATIVE BIAS VOLTAGE, TYPICALLY BETWEEN -15 VOLTS AND -25 VOLTS, BETWEEN SAID REGION AND SAID POINT, ILLUMINATING SAID SECOND SURFACE OF SAID REGION OVER THE AREA BENEATH SAID POINT WITH PHASE COHERENT OPTICAL MASER WAVE ENERGY, SAID ENERGY HAVING AN INTENSITY SUFFICIENT TO CAUSE CURRENTS TO FLOW IN SAID DIODE AT LEAST THREE TIMES THE GREATEST CURRENT VALUE WITHIN SAID RANGE, AND REMOVING SAID ILLUMINATION AND THEN SAID BIAS VOLTAGE WHEN THE ELECTRICAL CHARACTERISTICS OF SAID PHOTODIODE HAVE STABILIZED.
Claim 2
Independent Claim
125 words
THE METHOD OF FORMLING A PHOTODIODE HAVING A SEMICONDUCTIVE REGION WITH FIRST AND SECOND OPPOSITELY DISPOSED SURFACES AND A POINT CONTACT POSITIONED ON SAID FIRST SURFACE, SAID DIODE BEING DESIGNED FOR OPERATION WITHIN A GIVEN RANGE OF OPERATING CURRENTS; COMPRISING THE STEPS OF APPLYING AN APPROPRIATE NEGATIVE BIAS VOLTAGE, TYPICALLY BETWEEN -15 VOLTS AND -25 VOLTS, BETWEEN SAID REGION AND SAID POINT, ILLUMINATING SAID SECOND SURFACE OF SAID REGION OVER THE AREA BENEATH SAID POINT WITH PHASE COHERENT OPTICAL MASER WAVE ENERGY, SAID ENERGY HAVING AN INTENSITY SUFFICIENT TO CAUSE CURRENTS TO FLOW IN SAID DIODE AT LEAST THREE TIMES THE GREATEST CURRENT VALUE WITHIN SAID RANGE, AND REMOVING SAID ILLUMINATION AND THEN SAID BIAS VOLTAGE WHEN THE ELECTRICAL CHARACTERISTICS OF SAID PHOTODIODE HAVE STABILIZED.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |