Combined electrostatic lens system for ion implantation
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United States of America Patent
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Jun 13, 2017
Issued Date -
N/A
app pub date -
Dec 22, 2015
filing date -
Dec 26, 2014
priority date (Note) -
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Abstract
A system and method are provided for implanting ions at low energies into a workpiece. An ion source configured to generate an ion beam is provided, wherein a mass resolving magnet is configured to mass resolve the ion beam. The ion beam may be a ribbon beam or a scanned spot ion beam. A mass resolving aperture positioned downstream of the mass resolving magnet filters undesirable species from the ion beam. A combined electrostatic lens system is positioned downstream of the mass analyzer, wherein a path of the ion beam is deflected and contaminants are generally filtered out of the ion beam, while concurrently decelerating and parallelizing the ion beam. A workpiece scanning system is further positioned downstream of the combined electrostatic lens system, and is configured to selectively translate a workpiece in one or more directions through the ion beam, therein implanting ions into the workpiece.
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