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:
Mar. 23, 1999
Filed:
Dec. 11, 1996
Applicant:
Inventor:
Yoshinobu Hiraishi, Omura, JP;
Assignee:
Komatsu Electronic Metals Co., Ltd., Hiratsuka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348 86 ; 348 87 ;
Abstract
A method for precisely detecting the optimal temperature of the melt in a furnace center for necking step without using a radiation thermometer and two-color thermometer is disclosed. The invention observes a meniscus ring portion at the interface of a seed in a crucible and the melt surface by TV camera. Double rings of high lightness are examined through the image taken by the camera, and in the same time, the variation of temperature can be detected by the number of peaks in each scanning line in a picture of the TV screen.