Feed tool for shielding a portion of a crystal puller
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United States of America Patent
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Apr 8, 2014
Grant Date -
Nov 15, 2012
app pub date -
May 9, 2011
filing date -
May 9, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A crystal puller for melting silicon and forming a single crystal ingot and a feed tool for shielding a portion of the crystal puller during charging of the crystal puller are disclosed herein. The crystal puller includes a crucible for containing molten silicon. The feed tool includes a cylinder and a plate. The cylinder has an inner surface and an annular ledge formed in a portion of the inner surface. The cylinder has a diameter at the annular ledge that is less than a diameter of the cylinder at the inner surface. The plate is positioned on the annular ledge and includes a first section separate from a second section. The first section and the second section are operable to move laterally with respect to each other. The plate has a central opening formed in at least one of the first section and the second section.
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