US4082601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fabricating Li(NbTa)O3 films onto lithium tantalate single crystals
Assignee: Individual
•
Filing: 1976-01-26
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Granted: 1978-04-04
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Expires: 1996-01-26
Abstract
Abstract The inventive process produces a Li(NbTa)O 3 single-domain, single-crystalline film on a lithium tantalate single-crystal. The film is grown on the lithium tantalate, single-crystal by hydrothermal synthesis wherein the alkaline solution is heated to a temperature which is lower than the Curie point temperature of lithium tantalate. The mother material is a mixture of tantalum and lithium salts. The resulting film may guide several modes of light, and possibly modulate them.
Inventors
- 👤 Andre Maurice Regreny
- 👤 Michel Xavier Passaret
- 👤 Loic Andre Rivoallan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:08
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/132; G02B2006/12035; G02B2006/1204; Y; Y10; Y10S; Y10S117/00; Y10S117/918
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A process of manufacturing single crystal Li(NbTa)O 3 films on lithium tantalate single-crystals, wherein said film is grown in a pressure of about 1200 bars on the said lithium tantalate single-crystal by hydrothermal synthesis wherein the alkaline solution is heated to a temperature in the order of approximately 370° C. which is lower than the Curie point of lithium tantalate single-crystal, the mother material being a mixture of tantalum and niobium salts.
Claim 2
Dependent Claim
72 words
A process of manufacturing single crystal Li(NbTa)O 3 films on lithium tantalate single-crystals, wherein said film is grown in a pressure of about 1200 bars on the said lithium tantalate single-crystal by hydrothermal synthesis wherein the alkaline solution is heated to a temperature in the order of approximately 370° C. which is lower than the Curie point of lithium tantalate single-crystal, the mother material being a mixture of tantalum and niobium salts.
Claim 3
Dependent Claim
15 words
A process of manufacture according to claim 1, wherein the alkaline is a lithia solution.
Claim 4
Dependent Claim
25 words
A process of manufacture according to claim 1 wherein tantalum salt is lithium tantalate and niobium salt is niobium pentoxide Nb 2 O 5 .
Claim 5
Dependent Claim
23 words
A process of manufacture according to claim 1 wherein tantalum salt is tantalum pentoxide and niobium salt is lithium niobate LiNbO 3 .
Claim 6
Dependent Claim
20 words
A process of manufacture according to claim 1 wherein both the tantalum and niobium salts are oxides of those elements.
Claim 7
Dependent Claim
26 words
A process of manufacture according to claim 1 wherein the film thickness is determined as a function of the temperature and time duration of the reaction.
Claim 8
Dependent Claim
29 words
A process of manufacture according to claim 1 wherein a refractive index of the film is predetermined as a function of the niobium/tantalum ratio in the initial mother material.
References Cited (Backward Citations)
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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) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |