US4748646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray lithography system
Assignee: Fujitsu Ltd
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Filing: 1987-03-18
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Granted: 1988-05-31
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Expires: 2007-03-18
Abstract
Abstract An X-ray lithography system, in which an X-ray beam is separated from synchrotron radiation beams and reflected by a scanning mirror which vertically scans the reflected X-ray beam. The X-ray is irradiated into an exposure chamber via a beryllium window, which is vertically oscillated in such a manner that the beryllium window is shifted up and down in synchronization with the scanning operation of the X-ray beam.
Inventors
- 👤 Toshihiko Osada
- 👤 Ichiro Honjo
- 👤 Kenji Sugishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:23
CPC Classifications
H; H05; H05G; H05G1/00; G; G03; G03F; G03F7/00; G03F7/70; G03F7/70058; G03F7/70075; G03F7/708; G03F7/70808
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
An X-ray lithography system comprising: means for generating synchrotron beams and separating an X-ray beam thereform a vacuum chamber for defining a passage of the X-ray beam; a scanning mirror arranged in one section of said vacuum chamber for reflecting the X-ray beam; means for oscillating said scanning mirror so as to scan the reflected X-ray beam in a vertical direction; a beryllium window defined as a part of said vacuum chamber, through which the X-ray beam is irradiated into an exposure chamber in which is arranged a work piece to be exposed to the X-ray radiation; and, means for vertically oscillating said beryllium window in such a manner that the beryllium window is shifted up and down in synchronization with the scanning operation of the X-ray beam.
Claim 2
Dependent Claim
128 words
An X-ray lithography system comprising: means for generating synchrotron beams and separating an X-ray beam thereform a vacuum chamber for defining a passage of the X-ray beam; a scanning mirror arranged in one section of said vacuum chamber for reflecting the X-ray beam; means for oscillating said scanning mirror so as to scan the reflected X-ray beam in a vertical direction; a beryllium window defined as a part of said vacuum chamber, through which the X-ray beam is irradiated into an exposure chamber in which is arranged a work piece to be exposed to the X-ray radiation; and, means for vertically oscillating said beryllium window in such a manner that the beryllium window is shifted up and down in synchronization with the scanning operation of the X-ray beam.
Claim 3
Dependent Claim
35 words
A system as set forth in claim 1, wherein said beryllium window is relatively wide in a horizontal direction, but narrow in the vertical direction, and the thickness of said beryllium window is relatively thin.
Claim 4
Dependent Claim
41 words
A system as set forth in claim 1, wherein said beryllium window is relatively wide in a horizontal direction, but narrow in the vertical direction and has a size of 50 mm×5 mm, and a relatively thin thickness of, 10 μm.
Claim 5
Dependent Claim
35 words
A system as set forth in claim 1, wherein the oscillating means for the mirror and the oscillating means for the window comprise each linear motor separate, said linear motors are connected to a controller.
References Cited (Backward Citations)
US4516254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |