Patent US4904012A successfully refreshed from Google Patents.
US4904012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suction device
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1989-01-05
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Granted: 1990-02-27
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Expires: 2009-01-05
Abstract
Abstract Suction device for handling a semiconductor wafer comprises a handling section having a plurality of suction ports opened in the same plane as the surface of the wafer and located within an area smaller than that of the surface of the wafer, a pressure reduction device connected to the suction port, an opening acts to release negative pressure produced by the pressure reduction device when a finger is released therefrom, and a grip integrally coupled to the handling section.
Inventors
- 👤 Masanori Nishiguchi
- 👤 Takeshi Sekiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:15
CPC Classifications
H; H10; H10P; H10P72/00; H10P72/70; H10P72/78; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5313; Y10T29/53191
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A suction device for handling a semiconductor wafer having a surface including a central processed region and a peripheral unprocessed region, said suction device comprising: a handling section having upper and lower surfaces, a plurality of suction ports defined through said lower surface about an outer periphery of said lower surface so as to define a substantially arc-shaped suction port configuration, said handling section being sized and said suction ports being disposed so that when said lower surface of said handling section is placed in facing relation to and in operative contact with a surface of a semiconductor wafer, said suction ports are in facing relation to an unprocessed peripheral portion of the wafer and said handling section is free from operative contact with a processed portion of the semiconductor wafer; a pressure reduction means operatively coupled to said suction ports for producing a negative pressure; means for releasing said negative pressure produced by said pressure reduction means; and a grip element coupled to said handling section.
Claim 2
Dependent Claim
167 words
A suction device for handling a semiconductor wafer having a surface including a central processed region and a peripheral unprocessed region, said suction device comprising: a handling section having upper and lower surfaces, a plurality of suction ports defined through said lower surface about an outer periphery of said lower surface so as to define a substantially arc-shaped suction port configuration, said handling section being sized and said suction ports being disposed so that when said lower surface of said handling section is placed in facing relation to and in operative contact with a surface of a semiconductor wafer, said suction ports are in facing relation to an unprocessed peripheral portion of the wafer and said handling section is free from operative contact with a processed portion of the semiconductor wafer; a pressure reduction means operatively coupled to said suction ports for producing a negative pressure; means for releasing said negative pressure produced by said pressure reduction means; and a grip element coupled to said handling section.
Claim 3
Dependent Claim
64 words
A suction device according to claim 1, in which an elastic member is provided on said handling section at the suction port surface thereof, said elastic member being hermetically interposed between said handling section and the surface of said semiconductor wafer when said semiconductor wafer is handled by said suction device, said elastic member maintaining said negative pressure produced by said pressure reduction means.
Claim 4
Dependent Claim
55 words
A suction device according to claim 1, in which said means for releasing the negative pressure is an opening provided in said grip element said opening communicating with a pressure reduction line between said suction ports and said pressure reduction means and having such a size that said opening can be closed by a finger.
Claim 5
Dependent Claim
59 words
A suction device according to claim 1, wherein said handling section is c-shaped in horizontal cross-section and sized so as to cover at least a portion of an unprocessed peripheral region of and so as to be free from contact with a central processed region of a semiconductor wafer when the semiconductor wafer is contacted by said handling section.
Claim 6
Dependent Claim
34 words
A suction device according to claims 1 wherein said grip element extends in such a direction as to increase the distance between said grip element and the suction port side of said handling section.
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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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |