The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 1992
Filed:
Jan. 08, 1991
Applicant:
Inventor:
Franz T Geyling, Austin, TX (US);
Assignee:
Sematech, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B67D / ;
U.S. Cl.
CPC ...
2221462 ; 222368 ; 425425 ; 425447 ;
Abstract
An apparatus for casting a single silicon wafer. A quartz drum having a slotted opening pours measured amounts of granulated or powdered silicon into a crucible. Heaters then melt the solid silicon to provide a molten silicon in the crucible. Utilizing controlled gas pressure, the molten silicon is poured from the crucible onto a wafer chuck in order to cast a single silicon wafer.