Radiant energy – Ion generation – Field ionization type
Reexamination Certificate
2007-11-28
2009-12-01
Vo, Tuyet (Department: 2821)
Radiant energy
Ion generation
Field ionization type
C250S424000, C250S426000, C250S3960ML, C250S398000, C315S501000, C315S500000, C315S400000
Reexamination Certificate
active
07626180
ABSTRACT:
An ion gun11supplies an Ar gas into a main body111from a gas inlet114, causes DC hot cathode discharge between a filament113and an anode112to generate Ar plasma. Next, a voltage gradient is applied to separated accelerator grids116a,116bhaving a bi-separated configuration in an ion ejecting direction. The each potential of the separated accelerator grids116a,116bis independently controlled by independently setting accelerator control switches121a,121bon or off to change the potential of that of the separated accelerator grids116a,116bwhich corresponds to an ion beam to be disabled.
REFERENCES:
patent: 6724160 (2004-04-01), Kaufman et al.
patent: 2000323442 (2000-11-01), None
patent: 2003298374 (2003-10-01), None
Ito Makoto
Osada Yusuke
Shiono Tadahisa
Yabe Yutaka
Howard & Howard Attorneys PLLC
Showa Shinku Co., Ltd.
Vo Tuyet
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