Solaicx, Inc.

Other

David E A Smith

David L Bender

Gary Janik

Roy P Crawford

Anton R Fleig

A method is disclosed for continuous CZ crystal growing wherein one or more crystal ingots are pulled into a growth chamber from a crystal/melt interface defined in a crucible containing molten crystalline material that is continuously replenished by crystalline feedstock. The method includes separating the molten crystalline material, controlling the flow of the molten crystalline material and defining an annular space with respect to sidewalls of a heat shield in the chamber.

Weir method for improved single crystal growth in a continuous Czochralski process

A weir is extended vertically to define an optimal annular gap between the top of the weir and the underside of a super-adjacent heat shield. The annular gap provides a high velocity stream of argon gas to be directed from the growth region to the melt region to substantially eliminate the transport of airborne particles from the melt region to the growth region. The tall weir may be configured as a modular, reusable weir extension supportably engaged with an outer (and/or inner) weir.

Weir design providing optimal purge gas flow, melt control, and temperature stabilization for improved single crystal growth in a continuous Czochralski process

A weighing system is provided for a continuous Czochralski process that accurately measures the weight of the crucible and melt during crystal growth to control the introduction of feedstock in order to keep the weight approximately constant. The system can measure the weight of the crucible while the crucible is rotating, and is insensitive to vibrations of the melt surface as well as variable torques on the crucible shaft induced by the rotation. The system also measures the weight of the crucible and its contents in order to control the amount of feedstock recharged after an ingot is withdrawn.

Crucible weight measurement system for controlling feedstock introduction in Czochralski crystal growth

A user based computer system for information storage and retrieval in which information data items are stored in a persistent memory for later searching, retrieval and/or browsing and related in the memory by a frame system wherein the stored information includes primary information from outside the system and additional information derived from primary information and inherited from stored information.

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San Mateo, CA, United States of America

David E A Smith