US4136350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epitaxial growth of dissimilar materials
Assignee: AT&T Inc
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Filing: 1977-07-14
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Granted: 1979-01-23
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Expires: 1997-07-14
Abstract
Abstract A method of epitaxial crystal growth is disclosed in which the lattice constants of adjacent layers are in the ratios of small integers other than one. This method permits the use of previously incompatible compounds, in particular the combination of magneto optic and electro optic elements on the same substrate.
Inventors
- 👤 Ping K. Tien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
H; H10; H10D; H10D62/00; H10D62/40; G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G02F1/095; H10H; H10H29/00; H10H29/10; H10P; H10P14/00; H10P14/20; H10P14/29; H10P14/2901; H10P14/2921; H10P14/34; H10P14/3402; H10P14/3414; H10P14/3421
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
An article of manufacture comprising a first crystalline layer formed from a garnet compound having a first lattice constant A 1 , and a second crystalline layer formed from a compound comprising elements from groups III and V of the Periodic Table of the Elements formed on said first crystalline layer having a second lattice constant A 2 , said first and second lattice constants forming two ratios A 1 /A 2 and A 2 /A 1 , only one of which two ratios is substantially equal to an integer, said second crystalline layer being grown epitaxially onto at least a portion of said first crystalline layer.
Claim 2
Dependent Claim
107 words
An article of manufacture comprising a first crystalline layer formed from a garnet compound having a first lattice constant A 1 , and a second crystalline layer formed from a compound comprising elements from groups III and V of the Periodic Table of the Elements formed on said first crystalline layer having a second lattice constant A 2 , said first and second lattice constants forming two ratios A 1 /A 2 and A 2 /A 1 , only one of which two ratios is substantially equal to an integer, said second crystalline layer being grown epitaxially onto at least a portion of said first crystalline layer.
Claim 3
Dependent Claim
109 words
An electrical device comprising a first crystalline layer formed from a garnet compound having a first lattice constant A 1 , a second crystalline layer formed from a compound comprising elements from groups III and V of the Periodic Table of the Elements having a second lattice constant A 2 , said first and second lattice constants forming two ratios A 1 /A 2 and A 2 /A 1 , only one of which two ratios is substantially equal to an integer, said second crystalline layer being grown epitaxially onto a portion of said substrate, and means for passing electrical signals through at least one of said crystalline layers.
Claim 4
Dependent Claim
109 words
An electrical device comprising a first crystalline layer formed from a garnet compound having a first lattice constant A 1 , a second crystalline layer formed from a compound comprising elements from groups III and V of the Periodic Table of the Elements having a second lattice constant A 2 , said first and second lattice constants forming two ratios A 1 /A 2 and A 2 /A 1 , only one of which two ratios is substantially equal to an integer, said second crystalline layer being grown epitaxially onto a portion of said substrate, and means for passing electrical signals through at least one of said crystalline layers.
Claim 5
Dependent Claim
124 words
An integrated-optics apparatus comprising a first layer formed from a garnet compound having a first lattice constant A 1 , a second layer formed from a compound comprising elements from groups III and V of the Periodic Table of the Elements having a second lattice constant A 2 , which two lattice constants form two ratios A 1 /A 2 and A 2 /A 1 , only one of which two ratios is substantially equal to an integer, said second layer being grown epitaxially onto a portion of said first layer, at least two optical devices, one of said optical devices being epitaxially grown directly onto said first layer and a second one of said optical devices being epitaxially grown onto said second layer.
Claim 6
Dependent Claim
124 words
An integrated-optics apparatus comprising a first layer formed from a garnet compound having a first lattice constant A 1 , a second layer formed from a compound comprising elements from groups III and V of the Periodic Table of the Elements having a second lattice constant A 2 , which two lattice constants form two ratios A 1 /A 2 and A 2 /A 1 , only one of which two ratios is substantially equal to an integer, said second layer being grown epitaxially onto a portion of said first layer, at least two optical devices, one of said optical devices being epitaxially grown directly onto said first layer and a second one of said optical devices being epitaxially grown onto said second layer.
Claim 7
Dependent Claim
19 words
An integrated-optics device according to claim 3 in which said one of said optical devices is an magnetooptical device.
Claim 8
Dependent Claim
20 words
An integrated-optics device according to claim 3 in which said second one of said optical devices is an electrooptical device.
Claim 9
Dependent Claim
48 words
An integrated-optics apparatus according to claim 3, wherein said second one of said optical devices is a solid-state laser for producing and coupling a beam of radiation into said second layer and said one of said optical devices is a magnetooptic switch for modulating said beam of radiation.
References Cited (Backward Citations)
US3764195A
Cited
US4032951A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |