Patent ID: 8119208
Filing Date: 2012-02-21
Classification: C23C,H01J

Abstract:
1. A method for performing plasma-based ion implantation comprising: locating a sample on a sample holder in an implantation chamber, supplying gaseous or vaporized implantation material to said implantation chamber through a feed conduit, said feed conduit having an end that opens into said implantation chamber and above said sample holder to form a feed conduit exit opening, wherein said end and said feed conduit exit openings formed by said end define a feed conduit exit opening cross-sectional area, and wherein said sample holder defines a sample holder cross-sectional area situated opposite from said feed conduit exit opening cross-sectional area, said feed conduit exit opening cross-sectional area being smaller than said sample holder cross-sectional area; and applying a negative potential to said sample holder while maintaining said end at a potential that is positive relative to said sample holder so as to generate an electron focused electric field between said sample holder and said feed conduit exit opening that is effective to generate a glow discharge to create a plasma from said gaseous or vaporized implantation material, whereby ions from said plasma are accelerated towards said sample for implantation therein.