Patent ID: 9721760
Date: 2017-08-01
CPC Classifications: H01J,H05H

Claim:
1. A plasma reactor for processing a workpiece, comprising: a processing chamber, a workpiece support in said chamber, a ceiling facing said workpiece support and defining a process zone, said processing chamber comprising an electron beam entrance aligned with an in-chamber beam axis extending through said process zone, said in-chamber beam axis being parallel with a support plane of said workpiece support; an electron source plasma chamber comprising an electron extraction grid and an electron emission port aligned with a beam emission axis, said beam emission axis being transverse to said in-chamber beam axis; an electron deflection chamber comprising a first port coupled to said electron emission port and a second port coupled to said electron beam entrance, and a source of a magnetic field, said magnetic field extending into said electron deflection chamber, wherein said source of said magnetic field comprises magnets disposed on opposite sides of said electron deflection chamber such that central axes of said magnets coincide with each other, and configured to generate a magnetic field direction that is transverse to said beam emission axis and transverse to said in-chamber beam axis; and annular plasma confinement magnets having a magnetic field direction generally coinciding with said in-chamber beam axis.