US4472636A
Expired / Lapsed
US
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Method of and device for corpuscular projection
Assignee: Jenoptik AG
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Filing: 1980-10-30
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Granted: 1984-09-18
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Expires: 2000-10-30
Abstract
Abstract The invention relates to a method of and device for producing any desired patterns on a target. The irradiating beam is modulated over the entire cross-sectional area by an electro-magnetic field, which is obtained by a line or two-dimensionally shaped electrode grid, each individual electrode of which can be differently charged and which reflects the irradiation beam or produces a respective strip.
Inventors
- 👤 Eberhard Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:05
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/317; H01J37/3174; B; B82; B82Y; B82Y10/00; B82Y40/00; H01J37/3002; H01J37/3007; H01J2237/00; H01J2237/04; H01J2237/043; H01J2237/30; H01J2237/317; H01J2237/3175; H01J2237/31777
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
Device for corpuscular projection for electron irradiation of a target in which a radiation source is astigmatically imaged through a quadrupole lens into a first and a second real focal line, and in which the first focal line is stigmatically imaged via a lens arrangement upon a target, characterised in that the second focal line is adjusted upon an opening of a slit aperture, and in that at least one strip of electrodes is arranged in parallel to and adjacent the first focal line, the individual electrodes of the strip of electrodes being mutually insulated and connected to a voltage source via electronic switches, controlled by a storage.
Claim 2
Dependent Claim
108 words
Device for corpuscular projection for electron irradiation of a target in which a radiation source is astigmatically imaged through a quadrupole lens into a first and a second real focal line, and in which the first focal line is stigmatically imaged via a lens arrangement upon a target, characterised in that the second focal line is adjusted upon an opening of a slit aperture, and in that at least one strip of electrodes is arranged in parallel to and adjacent the first focal line, the individual electrodes of the strip of electrodes being mutually insulated and connected to a voltage source via electronic switches, controlled by a storage.
Claim 3
Dependent Claim
25 words
Device as claimed in claim 1, wherein the electrodes are arranged along the edge of a semiconductor wafer and protrude from out of said edge.
Claim 4
Dependent Claim
18 words
Device as claimed in claim 2, wherein said electrodes are thin compared to the space between neighboring electrodes.
Claim 5
Dependent Claim
14 words
Device as claimed in claim 1, wherein said lens arrangement is a quadrupole lens.
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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |