US4215934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing apparatus
Assignee: Canon Inc
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Filing: 1978-10-06
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Granted: 1980-08-05
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Expires: 1998-10-06
Abstract
Abstract A printing apparatus for use in the manufacture of semiconductor circuit elements, comprising a fixed mirror imaging system. A mask holder and wafer holder are respectively provided in an upper horizontal plane and a lower horizontal plane on the optical axis above and below said mirror imaging system, the light emerging from the mask being introduced into said system by a mirror inclined at 45° to the optical axis while the light emerging from said system is directed to the wafer by an another mirror inclined at 45° to the optical axis. The mask holder and wafer holder are integrally movable in the horizontal direction to allow formation of the entire image of mask on the wafer.
Inventors
- 👤 Tamotsu Karasawa
- 👤 Ichiro Kano
- 👤 Hideki Yoshinari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/70; G03F7/70216; G03F7/70233; G03F7/70358
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A printing apparatus for use in the manufacture of semiconductor circuit elements, comprising: an illuminating system; a mask holder for supporting said mask in an upper plane; a wafer holder for supporting a wafer in a lower plane; a fixed optical mirror imaging system comprising a concave mirror and a convex mirror the centers of curvature of which lie substantially on an optical axis positioned between said upper and lower planes and are parallel thereto; linear guide means; and a displacing mechanism incorporated in said guide means for displacing said mask holder and wafer holder linearly in the direction of said optical axis.
Claim 2
Dependent Claim
103 words
A printing apparatus for use in the manufacture of semiconductor circuit elements, comprising: an illuminating system; a mask holder for supporting said mask in an upper plane; a wafer holder for supporting a wafer in a lower plane; a fixed optical mirror imaging system comprising a concave mirror and a convex mirror the centers of curvature of which lie substantially on an optical axis positioned between said upper and lower planes and are parallel thereto; linear guide means; and a displacing mechanism incorporated in said guide means for displacing said mask holder and wafer holder linearly in the direction of said optical axis.
Claim 3
Dependent Claim
25 words
A printing apparatus according to the claim 1 wherein said mask holder and wafer holder are rendered integrally displaceable by means of a link member.
Claim 4
Dependent Claim
20 words
A printing apparatus according to the claim 1 wherein said light source is adapted to illuminate said mask from above.
Claim 5
Dependent Claim
25 words
A printing apparatus according to claim 3, wherein a microscope optical system is inserted into the optical path between said illuminating system and said mask.
Claim 6
Dependent Claim
101 words
A printing apparatus for use in the manufacture of semiconductor circuit elements, comprising: an illuminating system for illuminating a mask; a mask holder for supporting said mask in an upper plane; a wafer holder for supporting a wafer in a lower plane; optical mirror imaging means comprising a concave mirror and a convex mirror the centers of curvature of which lie substantially on an optical axis positioned between said upper and lower planes and are parallel thereto; and displacing means for displacing one of said means linearly in the direction of said optical axis relatively to the other of said means.
Claim 7
Dependent Claim
101 words
A printing apparatus for use in the manufacture of semiconductor circuit elements, comprising: an illuminating system for illuminating a mask; a mask holder for supporting said mask in an upper plane; a wafer holder for supporting a wafer in a lower plane; optical mirror imaging means comprising a concave mirror and a convex mirror the centers of curvature of which lie substantially on an optical axis positioned between said upper and lower planes and are parallel thereto; and displacing means for displacing one of said means linearly in the direction of said optical axis relatively to the other of said means.
References Cited (Backward Citations)
US3748015A
Cited
US4011011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |