Radiant energy – Ion generation – Field ionization type
Reexamination Certificate
2008-04-29
2008-04-29
Wells, Nikita (Department: 2881)
Radiant energy
Ion generation
Field ionization type
C250S427000, C250S426000, C315S111810, C313S34600R
Reexamination Certificate
active
07365339
ABSTRACT:
A cathode holder of a tubular shape is inserted into an opening for a cathode of a plasma generating chamber with a tip of the cathode holder positioned outward from an inner wall surface of the plasma generating chamber. The cathode is held in the cathode holder so that a front surface of the cathode will be positioned outward from the inner wall surface. In the cathode holder is provided a tubular first heat shield surrounding the cathode with a space provided between the first heat shield and the cathode, the tip of the first heat shield positioned outward from the inner wall surface. At a rear side of the cathode is provided a filament. The gap between the cathode holder and the plasma generating chamber is filled with an electrical insulating material.
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Fujita Hideki
Hamamoto Nariaki
Umisedo Sei
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Nissin Ion Equipment Co., Ltd.
Wells Nikita
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