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:
Apr. 14, 2025
Filed:
Jul. 28, 2020
Tokuyama Corporation, Yamaguchi, JP;
Junya Sakai, Yamaguchi, JP;
Seiji Katou, Yamaguchi, JP;
Makoto Kamada, Yamaguchi, JP;
Miki Emoto, Yamaguchi, JP;
Tokuyama Corporation, Yamaguchi, JP;
Abstract
A silicon core wire for depositing polycrystalline silicon is formed in a gate shape and includes a pair of vertical rod portions and a horizontal portion laterally connecting upper ends of the vertical rod portions, in which ends of the vertical rod portions and the horizontal portion are joined by welding, and a corner junction has a surface metallic concentration of 1 ppbw or less, more specifically, with an iron concentration of 0.2 ppbw or less, a chromium concentration of 0.1 ppbw or less, a nickel concentration of 0.05 ppbw or less, and a titanium concentration of 0.2 ppbw or less.