US4503335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor printing apparatus with multiple independent temperature control
Assignee: Canon Inc
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Filing: 1982-04-06
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Granted: 1985-03-05
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Expires: 2002-04-06
Abstract
Abstract A semiconductor printing apparatus eliminates the alignment error caused by any relative deformation between the mask and the wafer due to variations in parameters such as temperature change, and intermediate processing, for example, etching etc. The apparatus is characterized by the provision of a device for cooling or heating respectively and independently plural different sections of at least either of the mask and the wafer.
Inventors
- 👤 Kazuo Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:04
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70691; G03F7/708; G03F7/70858; G03F7/70866; G03F7/70875; H; H10; H10P; H10P95/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A semiconductor printing apparatus capable of compensating for any relative local variation in size between a mask and a wafer in the planes of the mask and the wafer, said printing apparatus comprising: means for holding a mask; means for holding a wafer; and means for locally adjusting the temperature of at least one of the mask and the wafer thereby compensating for the local variation in size in the planes of the mask and the wafer between the mask and wafer.
Claim 2
Dependent Claim
82 words
A semiconductor printing apparatus capable of compensating for any relative local variation in size between a mask and a wafer in the planes of the mask and the wafer, said printing apparatus comprising: means for holding a mask; means for holding a wafer; and means for locally adjusting the temperature of at least one of the mask and the wafer thereby compensating for the local variation in size in the planes of the mask and the wafer between the mask and wafer.
Claim 3
Dependent Claim
35 words
A semiconductor printing apparatus as set forth in claim 1, wherein said temperature adjusting means comprises plural solid elements independently controllably disposed along the surface of at least one of the mask and the wafer.
Claim 4
Dependent Claim
33 words
A semiconductor printing apparatus as set forth in claim 2, wherein said means for holding a wafer comprises a wafer chuck and wherein said temperature adjusting means is provided in said wafer chuck.
Claim 5
Dependent Claim
33 words
A semiconductor printing apparatus as set forth in claim 2, wherein said temperature adjusting means comprises plural thermo-modules independently controllably disposed along the surface of at least one of the mask and wafer.
Claim 6
Dependent Claim
40 words
A semiconductor printing apparatus as set forth in claim 4, wherein the surfaces of said thermo-modules together form a wafer holding surface and the gap between said thermo-modules is used as a vacuum channel for holding said wafer by suction.
Claim 7
Dependent Claim
31 words
A semiconductor printing apparatus as set forth in claim 1, wherein said temperature adjusting means is movable to change the distance therebetween and at least one of the mask and wafer.
Claim 8
Dependent Claim
122 words
A semiconductor printing apparatus capable of compensating for any local variation in size between a mask and a wafer in the planes of the mask and the wafer, said printing apparatus comprising: means for detecting the temperature in a local area of at least one of the mask and the wafer; means for locally adjusting the temperature of at least one of the mask and the wafer thereby to compensate for the local variation in size of at least one of the mask and the wafer in the planes of the mask and the wafer; and means for controlling said temperature adjusting means according to the difference in temperature distribution between the mask and the wafer detected by said temperature detection means.
Claim 9
Dependent Claim
122 words
A semiconductor printing apparatus capable of compensating for any local variation in size between a mask and a wafer in the planes of the mask and the wafer, said printing apparatus comprising: means for detecting the temperature in a local area of at least one of the mask and the wafer; means for locally adjusting the temperature of at least one of the mask and the wafer thereby to compensate for the local variation in size of at least one of the mask and the wafer in the planes of the mask and the wafer; and means for controlling said temperature adjusting means according to the difference in temperature distribution between the mask and the wafer detected by said temperature detection means.
Claim 10
Dependent Claim
38 words
A semiconductor printing apparatus as set forth in claim 7, further comprising a wafer chuck for holding the wafer and wherein said temperature detection means detects the temperature of the wafer and is provided within said wafer chuck.
Claim 11
Dependent Claim
31 words
A semiconductor printing apparatus as set forth in claim 7, wherein said temperature detection means detects the temperature of the mask and is provided in the space of a mask pattern.
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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |