Patent ID: 9136086
Filing Date: 2015-09-15
Classification: H01J

Abstract:
1. A process for modifying a surface of a substrate comprising: biasing a first electrode positive inside a process chamber and with intervening magnetic field lines between said first electrode and said process chamber, said magnetic field lines forming a first closed drift confinement region; supplying electrons wherein said electrons must cross said first closed drift confinement region to reach said first electrode, said electrons inducing ion formation in said closed drift region from a gas present in said process chamber; impinging on the surface of the substrate with said ions to modify the surface; switching said first electrode charge bias to negative in the presence of said gas to suppress ion formation and generate a first magnetron sputter plasma proximal to said first electrode, said first magnetron sputter plasma created by magnets forming a magnetron sputter confinement field on said first electrode; cleaning deposited contaminants from said first electrode with said magnetron sputter plasma; and returning said first electrode charge bias to positive to induce repeat ion formation modifying the surface of the substrate.