US4496239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection exposure apparatus
Assignee: Canon Inc
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Filing: 1982-11-09
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Granted: 1985-01-29
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Expires: 2002-11-09
Abstract
Abstract Disclosed is an apparatus for exposing a wafer to a projected image of a mask, and including a mask holder for holding the mask, a wafer holder for holding the wafer, a projection optical system for projecting the image of the mask upon the wafer, a guide path extending along a scanning direction, a plurality of sliders sliding on the guide path, a movable member coupling the mask holder and the wafer holder and placed on the sliders, a heater for compensating for the magnification error of the image in a direction orthogonal to the scanning direction attributable to the projection optical system and for producing a temperature distribution in one of the mask and the wafer, and a controller for compensating for the magnification error of the image in the scanning direction and the error of right angle attributable to the guide path and for controlling the posture of the movable member during the movement thereof.
Inventors
- 👤 Junji Isohata
- 👤 Mitsuya Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:19
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70691; G03F7/70216; G03F7/70258; G03F7/70358; G03F7/708; G03F7/70858; G03F7/70866; G03F7/70875
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A projection exposure apparatus comprising: negative holding means for holding a negative; photosensitive member holding means for holding a photosensitive member; a projection optical system for projecting an image of the negative upon the photosensitive member; movable means for coupling said negative holding means and said photosensitive member holding means; guide means for guiding said movable means in a scanning direction; first compensating means for compensating for distortion of the image of the negative by said projection optical system by controlling the temperature of at least one of the negative and the photosensitive member; and second compensating means for compensating for inclination of the posture of said movable means during the movement thereof and for compensating for distortion of the image of the negative on the photosensitive member.
Claim 2
Dependent Claim
128 words
A projection exposure apparatus comprising: negative holding means for holding a negative; photosensitive member holding means for holding a photosensitive member; a projection optical system for projecting an image of the negative upon the photosensitive member; movable means for coupling said negative holding means and said photosensitive member holding means; guide means for guiding said movable means in a scanning direction; first compensating means for compensating for distortion of the image of the negative by said projection optical system by controlling the temperature of at least one of the negative and the photosensitive member; and second compensating means for compensating for inclination of the posture of said movable means during the movement thereof and for compensating for distortion of the image of the negative on the photosensitive member.
Claim 3
Dependent Claim
16 words
A projection exposure apparatus according to claim 1, wherein said first compensating means comprises a heater.
Claim 4
Dependent Claim
18 words
A projection exposure apparatus according to claim 1, wherein said first compensating means comprises a Peltier element group.
Claim 5
Dependent Claim
42 words
A projection exposure apparatus according to claim 1, wherein said guide means has a guide path and a fluid bearing engaged therewith, and said second compensating means comprises a controller for controlling a fluid pressure to be supplied to said fluid bearing.
Claim 6
Dependent Claim
20 words
A projection exposure apparatus according to claim 1, wherein said projection optical system comprises a one-to-one magnification reflecting optical system.
Claim 7
Dependent Claim
79 words
A projection exposure apparatus comprising: negative holding means for holding a negative; photosensitive member holding means for holding a photosensitive member; a projection optical system for projecting the image of the negative upon the photosensitive member; means for moving said photosensitive member holding means relative to said projection optical system; and temperature control means for producing a predetermined temperature distribution in the photosensitive member to compensate for distortion of the image of the negative by the projection optical system.
Claim 8
Dependent Claim
79 words
A projection exposure apparatus comprising: negative holding means for holding a negative; photosensitive member holding means for holding a photosensitive member; a projection optical system for projecting the image of the negative upon the photosensitive member; means for moving said photosensitive member holding means relative to said projection optical system; and temperature control means for producing a predetermined temperature distribution in the photosensitive member to compensate for distortion of the image of the negative by the projection optical system.
Claim 9
Dependent Claim
29 words
A projection exposure apparatus according to claim 7, further comprising image limiting means for limiting the image of the negative on the photosensitive member along the direction of movement.
Claim 10
Dependent Claim
132 words
A projection exposure apparatus comprising: a mask holder for holding a mask; a wafer holder for holding a wafer; a projection optical system for projecting the image of the mask upon the wafer; a guide path extending along a scanning direction; a plurality of sliders sliding on said guide path; a movable member coupling said mask holder and said wafer holder and placed on said sliders; a heater for compensating for magnification error of the image in a direction orthogonal to the scanning direction attributable to said projection optical system and for producing a temperature distribution in one of the mask and the wafer; and a controller for compensating for magnification error of the image in the scanning direction and for controlling the posture of said movable member during the movement thereof.
Claim 11
Dependent Claim
132 words
A projection exposure apparatus comprising: a mask holder for holding a mask; a wafer holder for holding a wafer; a projection optical system for projecting the image of the mask upon the wafer; a guide path extending along a scanning direction; a plurality of sliders sliding on said guide path; a movable member coupling said mask holder and said wafer holder and placed on said sliders; a heater for compensating for magnification error of the image in a direction orthogonal to the scanning direction attributable to said projection optical system and for producing a temperature distribution in one of the mask and the wafer; and a controller for compensating for magnification error of the image in the scanning direction and for controlling the posture of said movable member during the movement thereof.
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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |