Patent ID: 6737657
Filing Date: 2004-05-18
Classification: H01J

Abstract:
An ion implanting apparatus for implanting ionized impurities into a semiconductor substrate, the ion implanting apparatus comprising:an ionization unit operative to produce an ion beam; an analyzer unit connected to said ionization unit downstream thereof in the apparatus such that the ion beam produced by the ionization unit passes through the analyzer unit, said analyzer unit operative to discriminate ions that are to be implanted into the substrate; an implanting chamber connected to said analyzer unit downstream thereof in the apparatus and in which the ions are implanted into the substrate; a vacuum unit including a vacuum pump connected to said analyzing unit so as to create a vacuum within the analyzing unit; a vacuum gauge connected to said analyzing unit so as to measure the level of the vacuum within the analyzer unit; and a magnetic field shield comprising a plurality of magnetic field shielding plates extending around said vacuum gauge, and dielectric material interposed between said magnetic field shielding plates, whereby the vacuum gauge is shielded from an external magnetic field.