Electron-optically radiatable structure

Details Electron-optically radiatable structure Electron-optically radiatable structure

1975-12-31

1978-02-21

Anderson, Bruce C.

Radiant energy

Radiation controlling means

250311, G21K 100

Patent

active

040754979

ABSTRACT:
An improved, thin layer, metallic diaphragm structure for electron microscopes is disclosed having a very thin sheet member, approximately 0.5 to 1 micron thick, surrounding the aperture which is attached to and supported by a reinforcing member approximately 30 microns thick, set away from the aperture. Both the thin sheet member and the reinforcing member are formed from the same heavy metal, preferably gold. A modified object diaphragm structure is also disclosed which is provided with a meshlike screen extending across the aperture to support electron absorbing elements located in the middle of the aperture. The meshlike elements of the screen are of such a narrow design that they are not resolvable by the electron beam of the microscope.

REFERENCES:
patent: 3227880 (1966-01-01), Wideroe
patent: 3374112 (1968-03-01), Danon
patent: 3421000 (1969-01-01), Lieber et al.
patent: 3659098 (1972-04-01), Politycki et al.
patent: 3847689 (1974-11-01), Fletcher et al.
patent: 3988153 (1976-10-01), Politycki

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