Emission characteristics of a hafniated oriented tungsten thermal field emission source

1989 ◽  
Vol 7 (5) ◽  
pp. 3112-3116 ◽  
Author(s):  
M. Troyon ◽  
A. K. Pandey ◽  
J. P. Orlikowski
Keyword(s):  
Field Emission ◽  
Thermal Field ◽  
Emission Source ◽  
Emission Characteristics

A High Resolution Scanning Microscope

1968 ◽  
Vol 26 ◽  
pp. 356-357
Author(s):  
A. V. Crewe ◽  
J. Wall ◽  
L. M. Welter
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Spherical Aberration ◽  
Focal Length ◽  
Spot Size ◽  
Emission Source ◽  
Field Of View ◽  
Scanning Microscope ◽  
Magnetic Lens ◽  
High Quality

A scanning microscope using a field emission source has been described elsewhere. This microscope has now been improved by replacing the single magnetic lens with a high quality lens of the type described by Ruska. This lens has a focal length of 1 mm and a spherical aberration coefficient of 0.5 mm. The final spot size, and therefore the microscope resolution, is limited by the aberration of this lens to about 6 Å.The lens has been constructed very carefully, maintaining a tolerance of + 1 μ on all critical surfaces. The gun is prealigned on the lens to form a compact unit. The only mechanical adjustments are those which control the specimen and the tip positions. The microscope can be used in two modes. With the lens off and the gun focused on the specimen, the resolution is 250 Å over an undistorted field of view of 2 mm. With the lens on,the resolution is 20 Å or better over a field of view of 40 microns. The magnification can be accurately varied by attenuating the raster current.

Electron Field Emission Characteristics of Silicon Nanodots Formed by the LPCVD Technique

2011 ◽  
Vol 49 (4) ◽  
pp. 342-347
Author(s):  
Kyoungwan Park ◽  
Seungman An ◽  
Taekyung Yim ◽  
Kyungsu Lee ◽  
Jeongho Kim ◽  
...  
Keyword(s):  
Field Emission ◽  
Emission Characteristics ◽  
Electron Field Emission ◽  
Electron Field

Electrophoresis deposition and field emission characteristics of planar-gate-type electron source with carbon nanotubes

2008 ◽  
Vol 403 (10-11) ◽  
pp. 1793-1796 ◽  
Author(s):  
Wenhui Lu ◽  
Hang Song ◽  
Yixin Jin ◽  
Hui Zhao ◽  
Haifeng Zhao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Electron Source ◽  
Emission Characteristics ◽  
Electrophoresis Deposition
Sign in / Sign up

Export Citation Format

Share Document