US3751309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
The use of a glass dopant for gap and electroluminescent diodes produced thereby
Assignee: AT&T Inc
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Filing: 1971-03-29
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Granted: 1973-08-07
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Expires: 1991-03-29
Abstract
Abstract Zn(PO3)2, as a low melting point glass, is used as the zinc and oxygen doping source in the growth of the p-type region of gallium phosphide electroluminescent diode material. It is a relatively low vapor pressure liquid above 872*C permitting intimate contact with the GaP containing melt and rapid solution therein during crystal pulling or liquid phase epitaxial crystal growth.
Inventors
- 👤 L Derick
- 👤 A Jordan
- 👤 H Verleur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:52
CPC Classifications
C; C30; C30B; C30B15/00; C30B15/02; C30B15/04; C30B29/00; C30B29/10; C30B29/40; C30B29/44; H; H10; H10H; H10H20/00; H10H20/80; H10P; H10P14/00; H10P14/20; H10P14/26; H10P14/263; H10P14/265; H10P14/29; H10P14/2901; H10P14/2907; H10P14/2909; H10P14/34; H10P14/3402; H10P14/3414; H10P14/3418; H10P14/3438; H10P14/3441; H10P14/3444; H10P14/3446; Y; Y10; Y10S; Y10S148/00; Y10S148/065; Y10S148/119; Y10S252/00; Y10S252/95; Y10S438/00; Y10S438/914; Y10S438/918
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
20 words
A method of claim 1 in which the Zn(PO3)2 is introduced into the melt after the melt has become molten.
Claim 2
Dependent Claim
42 words
A method of claim 1 in which the Zn(PO3)2 is introduced in a molecular proportion between .005 percent and 5 percent of the number of atoms of phosphorus in the melt and within the area of FIG. 2 circumscribed by curve ABCD.
Claim 3
Dependent Claim
39 words
A method of claim 3 in which the p-type region is grown as a portion of a bulk crystal by the deposition onto a seed crystal from the melt, which melt is essentially stoichiometric in its gallium phosphide content.
Claim 4
Dependent Claim
31 words
A method of claim 4 in which the Zn(PO3)2 is introduced in a molecular proportion between 0.005 percent and 0.05 percent of the number of atoms of phosphorus in the melt.
Claim 5
Dependent Claim
33 words
A method of claim 3 in which the p-n type region is grown as a crystal platelet by the slow cooling of a melt, which melt contains less than 10 atomic percent phosphorus.
Claim 6
Dependent Claim
31 words
A method of claim 6 in which the Zn(PO3)2 is introduced in a molecular proportion between 0.1 percent and 1 percent of the number of atoms of phosphorus in the melt.
Claim 7
Dependent Claim
35 words
A method of claim 3 in which the p-type region is deposited from the melt as a thin epitaxial layer on a crystalline gallium phosphide substrate, which melt contains less than 5 atomic percent phosphorus.
Claim 8
Dependent Claim
31 words
A method of claim 8 in which the Zn(PO3)2 is introduced in a molecular proportion between 1 percent and 5 percent of the number of atoms of phosphorus in the melt.
Claim 9
Dependent Claim
26 words
A method of claim 3 in which the Zn(PO3)2 is introduced in a molecular proportion within the area of FIG. 2 circumscribed by the curve EFGH.
References Cited (Backward Citations)
US3278342A
Cited
US3462320A
Cited
US3549401A
Cited
US3470038A
Cited
US3632431A
Cited
US3647579A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |