Radiant energy – Inspection of solids or liquids by charged particles – Electron probe type
Reexamination Certificate
2007-03-13
2009-02-24
Wells, Nikita (Department: 2881)
Radiant energy
Inspection of solids or liquids by charged particles
Electron probe type
C250S306000, C250S3960ML, C250S397000, C250S491100, C250S492200
Reexamination Certificate
active
07495216
ABSTRACT:
The inventive apparatus measures workfunction values using deflection of an electron beam without direct contact of the electron beam with the sample surface. The apparatus, mounted within a vacuum chamber, includes an electron gun, a position sensitive electron detector, and a sample. The sample is located such that an electron beam emanating from the gun can approach the surface and then be deflected into the position sensitive electron detector. Workfunction values are then derived from a measured deflected-electron position distribution.
REFERENCES:
patent: 6627903 (2003-09-01), Hirayanagi
patent: 7015467 (2006-03-01), Maldonado
Ermakov Alexei Victorovich
Hinch Barbara Jane
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