US3677228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal growth apparatus
Assignee: AT&T Inc
•
Filing: 1970-04-17
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Granted: 1972-07-18
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Expires: 1990-04-17
Abstract
Abstract A crystal growth apparatus suitable for preparing epitaxial films of Group III(a) - V(a) compounds by tipping techniques is described. The novel apparatus includes means for removing deleterious oxides from the surface of source solutions prior to the deposition thereon of seed crystals.
Inventors
- 👤 Morton B Panish
- 👤 Stanley Sumski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:28
CPC Classifications
C; C30; C30B; C30B19/00; C30B19/06; C30B19/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
an H-shaped substrate holder situated upon the base of the boat assembly, said holder including a three-sided chamber for containing a substrate member, the legs of said chamber being parallel to and equidistant from the vertical members of the H and perpendicular to and below the horizontal member of the H; and
Claim 2
Dependent Claim
63 words
actuating means adapted to slide between the vertical members of the H in response to movement of the growth tube whereupon the H moves so that the three-sided chamber passes over the well and is coextensive therewith; b. means for tipping said growth tube from a first direction to a second direction, thereby effecting movement of said actuating means and said substrate holder.
References Cited (Backward Citations)
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US1906757A
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US2151183A
Cited
US2675303A
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |