US3843401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bismuth masking technique for use on injection laser diodes as means of uniformity evaluation and spontaneous control and product
Assignee: Texas Instruments Inc
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Filing: 1972-07-14
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Granted: 1974-10-22
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Expires: 1992-07-14
Abstract
Abstract 1. A METHOD OF MASKING THE LASING REGION OF AN INJECTION LASER DIODE WHICH COMPRISES THE STEP OF: (A) COATING THE LASING SURFACE OF SAID DIODE WITH A MATERIAL OF SUFFICIENTLY LOW ELECTRICAL CONDUCTIVITY NOT TO EFFECT THE DIODE PROPERTIES OF SAID DIODE AND EVAPORABLE AT POWER LEVELS OF SAID DIODE WHICH DO NOT DEGRADE SAID DIODE; AND (B) PULSING SAID DIODE AT AN ENERGY LEVEL SUFFICIENTLY HIGH TO EVAPORATE SAID MATERIAL, WHEREBY SAID MATERIAL EVAPORATES ALONG THE LASING REGION OF SAID DIODE.
Inventors
- 👤 R Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02; H01S5/028; H01S5/0281
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD OF MASKING THE LASING REGION OF AN INJECTION LASER DIODE WHICH COMPRISES THE STEP OF: (A) COATING THE LASING SURFACE OF SAID DIODE WITH A MATERIAL OF SUFFICIENTLY LOW ELECTRICAL CONDUCTIVITY NOT TO EFFECT THE DIODE PROPERTIES OF SAID DIODE AND EVAPORABLE AT POWER LEVELS OF SAID DIODE WHICH DO NOT DEGRADE SAID DIODE; AND
Claim 2
Independent Claim
57 words
A METHOD OF MASKING THE LASING REGION OF AN INJECTION LASER DIODE WHICH COMPRISES THE STEP OF: (A) COATING THE LASING SURFACE OF SAID DIODE WITH A MATERIAL OF SUFFICIENTLY LOW ELECTRICAL CONDUCTIVITY NOT TO EFFECT THE DIODE PROPERTIES OF SAID DIODE AND EVAPORABLE AT POWER LEVELS OF SAID DIODE WHICH DO NOT DEGRADE SAID DIODE; AND
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |