US PATENT SUBCLASS 117 / 208
.~.~ Seed pulling


Current as of: June, 1999
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117 /   HD   SINGLE-CRYSTAL, ORIENTED-CRYSTAL, AND EPITAXY GROWTH PROCESSES; NON-COATING APPARATUS THEREFOR

200  DF  APPARATUS {4}
206  DF  .~ For crystallization from liquid or supercritical state {5}
208.~.~ Seed pulling {7}
209  DF  .~.~.~> Including solid member shaping means other than seed or product (e.g., EDFG die) {2}
213  DF  .~.~.~> Including a sectioned crucible (e.g., double crucible, baffle)
214  DF  .~.~.~> Including details of precursor replenishment
215  DF  .~.~.~> Including sealing means details
216  DF  .~.~.~> Including a fully-sealed or vacuum-maintained crystallization chamber (e.g., ampoule)
217  DF  .~.~.~> Including heating or cooling details (e.g., shield configuration)
218  DF  .~.~.~> Including details of means providing product movement (e.g., shaft guides, servo means)


DEFINITION

Classification: 117/208

Seed pulling:

(under subclass 206) Subject matter including features intended for seed pulling which is characterized by bringing a seed* into contact with a liquid precursor* (or nutrient*) media to initiate and conduct the growth process by then withdrawing it under conditions which permit crystal formation while pulling.

(1) Note. See subclass 13, (5) Note, for discussion of the differences between seed pulling and several other liquid state crystallization processes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13+, for corresponding processes.