Ion source element, ion implanter having the same and method...

Radiant energy – Ion generation – Field ionization type

Reexamination Certificate

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C250S427000, C250S492210, C315S111810, C315S111710

Reexamination Certificate

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07812320

ABSTRACT:
An ion source element, an ion implanter having the ion source element and a method of modifying the ion source element are provided. In the ion source element, a chamber may have a cavity divided into a plurality of inner sections configured substantially perpendicularly to an axis defined through centers of ends of the cavity. The larger inner sections may be at, or near, a center of the cavity and become smaller toward the ends of the cavity. A filament may be disposed at one end of the chamber to emit thermal electrons. A repeller may extend into the chamber through the other end of the chamber. An inlet may be formed in a first cavity wall to introduce gas having a dopant species into the chamber. A beam slit may be formed in a second cavity wall, opposite the inlet, of the chamber to extract an ionized species of the gas from the chamber.

REFERENCES:
patent: 5497006 (1996-03-01), Sferlazzo et al.
patent: 5763890 (1998-06-01), Cloutier et al.
patent: 5821677 (1998-10-01), Benveniste
patent: 7138768 (2006-11-01), Maciejowski et al.
patent: 09-063981 (1997-03-01), None
patent: 2001-160368 (2001-06-01), None
patent: 10-2005-0030007 (2005-03-01), None

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