JPS5684853A - Face structure of member located close to electron beam path - Google Patents
Face structure of member located close to electron beam pathInfo
- Publication number
- JPS5684853A JPS5684853A JP16238679A JP16238679A JPS5684853A JP S5684853 A JPS5684853 A JP S5684853A JP 16238679 A JP16238679 A JP 16238679A JP 16238679 A JP16238679 A JP 16238679A JP S5684853 A JPS5684853 A JP S5684853A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- inner face
- film
- electron beam
- beam path
- 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
- H01J37/02—Details
- H01J37/026—Means for avoiding or neutralising unwanted electrical charges on tube components
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electron Sources, Ion Sources (AREA)
- Electron Beam Exposure (AREA)
Abstract
PURPOSE:To reduce the cumulative charge on the inner face as possible, by providing many concaves, convexes or openings on a plane facing an electron beam path. CONSTITUTION:Many concaves 7, convexes or openings are provided on the inner face of a tube 1 for an electron beam path. For example, particles dispersed from a specimen 3 or the residual organic molecule in a tube will adhere to the inner face of the tube 1 of a scan type electron microscope except the concave 7, resulting in formation of an insulative film 8. Then ions produced in the tube 1 or stray electrons will adhere to the film 8, growing up to a cumulative charge, and the superficial charge will flow through the surface of the film 8 to the conductive face of the tube 1 where the film isn't formed in concave 7. When many concaves 7 are provided on the inner face of the tube 1, the path through which the adhered charge will flow to the conductive face at the concave 7 is shortened, resulting in the quick discharging, thereby the cumulative charge onto the inner face is reduced considerably.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16238679A JPS5684853A (en) | 1979-12-14 | 1979-12-14 | Face structure of member located close to electron beam path |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16238679A JPS5684853A (en) | 1979-12-14 | 1979-12-14 | Face structure of member located close to electron beam path |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5684853A true JPS5684853A (en) | 1981-07-10 |
Family
ID=15753585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16238679A Pending JPS5684853A (en) | 1979-12-14 | 1979-12-14 | Face structure of member located close to electron beam path |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5684853A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0197355A (en) * | 1987-10-08 | 1989-04-14 | Shinko Electric Co Ltd | Electron beam gun |
JP2013004680A (en) * | 2011-06-15 | 2013-01-07 | Canon Inc | Charged particle beam lens |
-
1979
- 1979-12-14 JP JP16238679A patent/JPS5684853A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0197355A (en) * | 1987-10-08 | 1989-04-14 | Shinko Electric Co Ltd | Electron beam gun |
JP2013004680A (en) * | 2011-06-15 | 2013-01-07 | Canon Inc | Charged particle beam lens |
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