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:
Jun. 06, 2000
Filed:
Feb. 27, 1997
Applicant:
Inventor:
Zhixin Li, Hudson, NH (US);
Assignee:
General Signal Technology Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
117201 ; 117 14 ; 117202 ;
Abstract
A method of and system for determining the melt-level in a crystal growing system. A rangefinder emits a signal to reflect off the melt. The reflected signal is directed to a retroreflector. The retroreflector redirects the signal along a parallel path back to the melt surface. The redirected signal is reflected off the melt surface back to the rangefinder, where it is analyzed to determine the distance traveled by the signal. From this, changes in melt-level are determined and the melt-level may be appropriately controlled.