US4777970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor drying apparatus
Assignee: Wacom Co Ltd
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Filing: 1987-10-14
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Granted: 1988-10-18
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Expires: 2007-10-14
Abstract
Abstract A vapor drying apparatus for semiconductor wafers, which is capable of preventing dust particles from entering the interior of the vapor drying apparatus incorporating therein a water washing part and a vapor drying part for a semiconductor wafer and, at the same time, thoroughly removing from the surface of a vapor dried semiconductor wafer the vapor cleaner adhering in the form of film or in a molecular thickness to the surface or an organic substance contained in the cleaner thereby bringing the surface of the semiconductor wafer to an ideally cleaned and dried state.
Inventors
- 👤 Masaki Kusuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/04; H10P72/0402; H10P72/0406; H10P72/0408; B; B01; B01D; B01D12/00; C; C23; C23G; C23G5/00; C23G5/02; C23G5/04; F; F26; F26B; F26B21/00; F26B21/40; F26B21/471; Y; Y10; Y10S; Y10S134/00; Y10S134/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A vapor drying apparatus comprising a cleaning part including a first container storing therein a cleaning liquid for cleaning a given object and a vapor drying part including a second container storing therein a volatile cleaning liquid and means for heating and vaporizing said volatile cleaning liquid and adapted to expose to the vapor of said volatile cleaning liquid said given object which has been cleaned in said cleaning part and thereby effect vapor drying of said given object, in which vapor drying apparatus said heating means is a block member having a depressed part in the form of a spheroidal quadric formed on the upper side thereof and a heater embedded therein in tightly closed state and said second container is formed of quartz in the form of a closed end tube and has a bottom part thereof formed in a spheroidal quadric fitted tightly to said depressed part.
Claim 2
Dependent Claim
150 words
A vapor drying apparatus comprising a cleaning part including a first container storing therein a cleaning liquid for cleaning a given object and a vapor drying part including a second container storing therein a volatile cleaning liquid and means for heating and vaporizing said volatile cleaning liquid and adapted to expose to the vapor of said volatile cleaning liquid said given object which has been cleaned in said cleaning part and thereby effect vapor drying of said given object, in which vapor drying apparatus said heating means is a block member having a depressed part in the form of a spheroidal quadric formed on the upper side thereof and a heater embedded therein in tightly closed state and said second container is formed of quartz in the form of a closed end tube and has a bottom part thereof formed in a spheroidal quadric fitted tightly to said depressed part.
Claim 3
Dependent Claim
15 words
A vapor drying apparatus according to claim 1, wherein said quartz is high-purity translucent quartz.
Claim 4
Dependent Claim
52 words
A vapor drying apparatus according to claim 1, wherein an opening of said second container is covered with a lid and said lid is provided therein with a cooling water path and is also provided at the center thereof with a perforation for permitting passage of said given object in and out.
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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |