Patent ID: 8575565
Filing Date: 2013-11-05
Classification: H01J

Abstract:
1. An ion beam source that is configured to emit an ion beam in a direction of a substrate, the ion beam source comprising: a cathode that includes a discharge opening defined therein, the discharge opening having a predetermined width; an anode located spaced apart from the cathode by a predetermined depth, the direction in which the ion beam is to be emitted being substantially parallel to a direction from the anode to the discharge opening in the cathode; first and second ceramic walls that are located between the anode and the cathode and at least partially define a discharge channel between the anode and the cathode; and at least one magnet that is shaped, arranged, and located in the ion beam source to generate a magnetic field that increases in density in general accordance with a gradient distribution with a low proximate the anode to a high at or proximate the discharge opening, and with magnetic field lines that run substantially perpendicular to an emmission trajectory of emitted ions within the discharge channel.