Patent ID: 6772776
Filing Date: 2004-08-10
Classification: B08B,G03F,H01J,Y10S

Abstract:
A device for in situ cleaning of a substrate, said device comprising:(a) a housing defining a vacuum chamber in which a substrate that reflects extreme ultraviolet radiation is located; (b) a source of gaseous species; (c) a source of electrons that are emitted to activate the gaseous species into activated gaseous species for cleaning the substrate, the source of electrons comprising: (i) at least one chamber, where the chamber having at least one side of a gas permeable material defines an interior region; (ii) a filament positioned within the chamber, where the filament is connected to a source of energy; (iii) at least one electrode positioned within the chamber, where the electrode is connected to a power supply; and (iv) means for removing heat from the chamber.