JPS55110041A - Electron beam projector - Google Patents
Electron beam projectorInfo
- Publication number
- JPS55110041A JPS55110041A JP1617879A JP1617879A JPS55110041A JP S55110041 A JPS55110041 A JP S55110041A JP 1617879 A JP1617879 A JP 1617879A JP 1617879 A JP1617879 A JP 1617879A JP S55110041 A JPS55110041 A JP S55110041A
- Authority
- JP
- Japan
- Prior art keywords
- lens
- focal point
- aperture
- deflection
- electron beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
- H01J37/3002—Details
- H01J37/3007—Electron or ion-optical systems
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electron Beam Exposure (AREA)
Abstract
PURPOSE:To reduce projecting deflection, simultaneously improve resolving power by a method wherein a driving input is adjusted by making variable the driving input of an irradiating lens, and by synchronizing it with a deflecting, and the effective focal point of the lens is kept constant. CONSTITUTION:The deflection of the focal point of an irradiating lens is synchronized with the input of a deflecting coil, and corrected by adjusting the focal point of the lens. That is, a small aperture is provided at the position of a minimum aberrated circle near the rear focal point of the lens, and the focal point of the lens is changed so that an electron beam passes through the aperture. At this time, an electron beam sensitive film to which an image is projected is connected to an ammeter as a method for detecting the change, and a method for measuring the passing current is used. Otherwise, the aperture is connected to the ammeter, and the current interrupted by the aperture may be measured. By so doing, it is possible to reduce the deflection by about 1/2 and the resolving power by 1/3 compared with those prior to correction, furthermore to enlarge the projecting area twice as large as before.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1617879A JPS55110041A (en) | 1979-02-16 | 1979-02-16 | Electron beam projector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1617879A JPS55110041A (en) | 1979-02-16 | 1979-02-16 | Electron beam projector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55110041A true JPS55110041A (en) | 1980-08-25 |
Family
ID=11909250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1617879A Pending JPS55110041A (en) | 1979-02-16 | 1979-02-16 | Electron beam projector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55110041A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4964097A (en) * | 1972-06-30 | 1974-06-21 | ||
JPS5392671A (en) * | 1977-01-20 | 1978-08-14 | Siemens Ag | Particleeray optical device for compressing and focusing specimen on mask |
-
1979
- 1979-02-16 JP JP1617879A patent/JPS55110041A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4964097A (en) * | 1972-06-30 | 1974-06-21 | ||
JPS5392671A (en) * | 1977-01-20 | 1978-08-14 | Siemens Ag | Particleeray optical device for compressing and focusing specimen on mask |
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