Patent US2185618A successfully refreshed from Google Patents.
US4464342A
Expired / Lapsed
US
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Molecular beam epitaxy apparatus for handling phosphorus
Assignee: Nokia Bell Labs
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Filing: 1982-05-14
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Granted: 1984-08-07
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Expires: 2002-05-14
Abstract
Abstract Molecular beam epitaxy apparatus that permits a cryo-panel on which high vapor pressure material has condensed to be removed from the growth chamber to an outgassing chamber permits the high vapor pressure material, such as phosphorus, to be easily used in growing compound semiconductor materials is described. The apparatus has an evacuable first chamber with a plurality of effusion ovens and an evacuable second chamber with a valve connecting the chambers. The apparatus further comprises apparatus for moving a cryo-panel between the first and second chambers and apparatus for heating the cryo-panel in the second chamber.
Inventors
- 👤 Won-Tien Tsang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:41
CPC Classifications
C; C30; C30B; C30B23/00; C30B23/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A molecular beam epitaxy apparatus comprising an evacuable first chamber having a plurality of effusion ovens, an evacuable second chamber, said second chamber being an outgassing chamber, a valve connecting said first and said second chambers, a pump for removing material from said second chamber, and a cryo-panel, said cryo-panel being capable of being moved between said first chamber and said second chamber through said valve; for moving said cryo-panel between said first chamber and said second chamber; means for heating said cryo-panel in said second chamber.
Claim 2
Dependent Claim
87 words
A molecular beam epitaxy apparatus comprising an evacuable first chamber having a plurality of effusion ovens, an evacuable second chamber, said second chamber being an outgassing chamber, a valve connecting said first and said second chambers, a pump for removing material from said second chamber, and a cryo-panel, said cryo-panel being capable of being moved between said first chamber and said second chamber through said valve; for moving said cryo-panel between said first chamber and said second chamber; means for heating said cryo-panel in said second chamber.
Claim 3
Dependent Claim
15 words
Apparatus as recited in claim 1 in which said first chamber further comprises another cryo-panel.
Claim 4
Dependent Claim
50 words
Apparatus as recited in claim 1 or 2 in which said first chamber further comprises an oven recharge interlock comprising a third chamber, a valve connecting said first chamber and said third chamber; means for moving at least one of said ovens between said first chamber and said third chamber.
Claim 5
Dependent Claim
27 words
Apparatus as recited in claim 3 in which said first recited cryo-panel extends into said outgassing chamber when said first recited cryo-panel is in the growth position.
Claim 6
Dependent Claim
21 words
Apparatus as recited in claim 4 in which said means for moving comprises a rod attached to said first recited cryo-panel.
Claim 7
Dependent Claim
28 words
Apparatus as recited in claim 5 in which said means for moving further comprises rollers, said first recited cryo-panel being positioned and arranged to move on said rollers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |