Patent ID: 9620335
Date: 2017-04-11
CPC Classifications: H01J

Claim:
1. A processing apparatus comprising: a plasma source coupled to a plasma chamber to generate a plasma in the plasma chamber; an extraction plate disposed along a side of the plasma chamber, the extraction plate having an aperture; a deflection electrode comprising an electrically conductive material, the deflection electrode disposed within the plasma chamber above the aperture and in contact with the plasma, the deflection electrode forming a pair of openings between the deflection electrode and edges of the extraction plate defining the aperture; and a deflection electrode power supply connected to the deflection electrode to generate a variable bias voltage with respect to the plasma chamber, wherein a first bias voltage applied to the deflection electrode is configured to generate a first angle of incidence for ions extracted from the plasma through at least one opening of the pair of openings, and a second bias voltage applied to the deflection electrode is configured to generate a second angle of incidence for ions extracted from the plasma through the at least one opening, the second angle of incidence being different from the first angle of incidence.