Patent ID: 8253114
Filing Date: 2012-08-28
Classification: H01J

Abstract:
1. An ion source for generating an ion beam containing an aluminum ion, comprising: a plasma generating chamber which is also used as an anode and generates a plasma in an interior, and into which an ionization gas containing fluorine is introduced; a hot cathode provided on one side in the plasma generating chamber and isolated electrically from the plasma generating chamber; an opposing reflecting electrode which is provided on other side in the plasma generating chamber to oppose to the hot cathode and is isolated electrically from the plasma generating chamber, to which a voltage that is negative in contrast to a potential of the plasma generating chamber is applied, and which reflects electrons in the plasma generating chamber and is formed of an aluminum containing material which is a solid state source, and is a first source of implantation ions; a magnet which generates a magnetic field along a line connecting the hot cathode and the opposing reflecting electrode, in the plasma generating chamber; and a gas inlet port configured to introduce the ionization gas into the plasma generating chamber, wherein the gas inlet port is connected to a wall of the plasma generating chamber apart from the opposing reflecting electrode.