Patent US4823480A successfully refreshed from Google Patents.
US4823480A
Expired / Lapsed
US
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Semiconductor heat-treating apparatus
Assignee: Texas Instruments Inc
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Filing: 1987-02-26
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Granted: 1989-04-25
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Expires: 2007-02-26
Abstract
Abstract A semiconductor heat-treating apparatus comprising a heat treatment furnace main, gas discharging means surrounding the port for carrying semiconductors into or out of said furnace main therethrough, an internal cylindrical partition of said gas discharging means, said internal cylindrical partition engaging fittedly with said port for semiconductors, said gas discharging means being provided with a gas-stream forming system for discharging gases and a second gas-stream forming system for supplying inert gas into said cylindrical partition on the one side thereof and allowing the inert gas together with the gases from said furnace main to exit therefrom.
Inventors
- 👤 Yasuo Komatsuzaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:56
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0431; H10P72/0434; F; F26; F26B; F26B21/00; F26B21/40; F26B9/00; F26B9/06; F26B9/066
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A semiconductor heat-treating apparatus comprising: a main heat treatment furnace including a port for carrying semiconductors into and out of said main furnace, a first chamber engaging and fitted around said port for semiconductors, the first chamber comprising a perforated wall for supplying and withdrawing gas, a second chamber including a partial partition mounted on one side of the perforated wall opposite the port and a conduit for supplying inert gas into said second chamber and into the first chamber from the second chamber via the perforated wall, and a gas system for discharging gases from said first and second chambers.
Claim 2
Dependent Claim
101 words
A semiconductor heat-treating apparatus comprising: a main heat treatment furnace including a port for carrying semiconductors into and out of said main furnace, a first chamber engaging and fitted around said port for semiconductors, the first chamber comprising a perforated wall for supplying and withdrawing gas, a second chamber including a partial partition mounted on one side of the perforated wall opposite the port and a conduit for supplying inert gas into said second chamber and into the first chamber from the second chamber via the perforated wall, and a gas system for discharging gases from said first and second chambers.
Claim 3
Dependent Claim
42 words
The apparatus according to claim 1 wherein said gas system comprises a box enclosing the first and second chambers and having on one side a plurality of gas injecting apertures for injecting gas and having on its opposite side, gas exiting apertures.
Claim 4
Dependent Claim
42 words
The apparatus according to claim 2 wherein inert gas is injected through said conduit, second chamber, and perforations to form an inert gas curtain at the port and passes together with gas from said gas injecting apertures, out of said gas exiting
Claim 5
Dependent Claim
22 words
The apparatus according to claim 1 wherein said inert gas is supplied to said port concurrently with gas in said gas system.
Claim 6
Dependent Claim
33 words
The apparatus according to claim 2 wherein said gas system is provided with, on one side a gas inlet and on an opposite side, an outlet for discharging gases including said inert gas.
Claim 7
Dependent Claim
32 words
The apparatus according to claim 2 wherein perforations of said perforated wall opposite said second chamber are disposed at higher levels than perforations of said perforated wall adjacent to said second chamber.
Claim 8
Dependent Claim
15 words
The apparatus according to claim 1 wherein said partial partition is made of transparent 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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |