Apparatus and method for distribution of dopant gases or vapors in an arc chamber for use in an ionization source
First Claim
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1. An apparatus for use in an ion implant machine, the apparatus comprising:
- an arc chamber;
a plenum;
a first plenum wall;
a sub-plenum, and;
a baffle comprising a plurality of apertures through which fluid may flow between the sub-plenum and the arc chamber;
wherein fluid may flow between the plenum and the sub-plenum through an aperture formed in the first plenum wall positioned between the plenum and the sub-plenum.
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Abstract
An apparatus and method for distributing dopant gas or vapor in an arc chamber of ion source used as part of an ion implanter. The apparatus includes a plenum, a sub-plenum, and a baffle to distribute the dopant gas or vapor through out the arc chamber. The method allows dopant gas and vapors to be distributed in such a way as to cause efficient reaction of dopant gas or vapor molecules with electrons created by a filament contained in the arc chamber. The reaction of dopant gas or vapor molecules with the electrons in turn produces positively charged ions by the ion implanter.
15 Citations
12 Claims
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1. An apparatus for use in an ion implant machine, the apparatus comprising:
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an arc chamber;
a plenum;
a first plenum wall;
a sub-plenum, and;
a baffle comprising a plurality of apertures through which fluid may flow between the sub-plenum and the arc chamber;
wherein fluid may flow between the plenum and the sub-plenum through an aperture formed in the first plenum wall positioned between the plenum and the sub-plenum. - View Dependent Claims (2, 3, 4, 5, 6, 7)
first and second arc chamber walls;
a filament mounted to the first arc chamber wall;
a repeller plate mounted to the second arc chamber wall;
wherein the baffle is positioned such that fluid passing through baffle apertures into the arc chamber, passes between the filament and repeller plate.
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8. A method of distributing gas or vapor in an arc chamber used in an ion implanter, the method comprising:
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(a) the arch chamber receiving gas or vapor from a sub-plenum via a plurality of apertures formed in a baffle;
(b) the sub-plenum receiving gas or vapor from a plenum via an aperture formed in an aperture of a first plenum wall, wherein the baffle and first plenum wall define the sub-plenum;
(c) the plenum receiving gas or vapor from an aperture formed in a second plenum wall. - View Dependent Claims (9, 10, 11, 12)
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Specification