Ion implantation apparatus and ion implantation method
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United States of America Patent
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Dec 14, 2010
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app pub date -
Apr 10, 2008
filing date -
Apr 10, 2007
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Abstract
An ion implantation apparatus according to the invention includes a park electrode as a deflecting apparatus arranged at a section of a beam line from an outlet of a mass analysis magnet apparatus to a front side of a mass analysis slit for deflecting an ion beam in a predetermined direction of being deviated from a beam trajectory line by an operation of an electric field. When the ion beam does not satisfy a desired condition, a park voltage is applied to the park electrode, thereby, the ion beam is brought into an evacuated state by being deflected from the beam trajectory line. As a result, the ion beam cannot pass through the mass analysis slit, and therefore, the ion beam which does not arrive at a wafer to prevent the ion beam which does not satisfy the condition from being irradiated to the wafer.
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