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:
Feb. 26, 2008
Filed:
Jul. 17, 2006
Martin Weber, Kastl, DE;
Wilfried Von Ammon, Hochburg, AT;
Herbert Schmidt, Halsbach, DE;
Janis Virbulis, Pinki, Babites Pag., LV;
Yuri Gelfgat, Jurmala, LV;
Leonid Gorbunov, Riga, LV;
Martin Weber, Kastl, DE;
Wilfried von Ammon, Hochburg, AT;
Herbert Schmidt, Halsbach, DE;
Janis Virbulis, Pinki, Babites Pag., LV;
Yuri Gelfgat, Jurmala, LV;
Leonid Gorbunov, Riga, LV;
Siltronic AG, Munich, DE;
Abstract
A silicon single crystal which, over an ingot length of over 10 percent of the total ingot length, has a uniform defect picture and narrow radial dopant and oxygen variations. The process in accordance with the Czochralski method involves bringing about a temperature distribution in the melt in the region of the solidification interface which deviates from rotational symmetry.