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. 02, 2004
Filed:
Jul. 05, 2000
Hitoshi Ohmori, Wako, JP;
Yutaka Yamagata, Wako, JP;
Nobuhide Itoh, Hitachi, JP;
Nobuyuki Nagato, Chiba, JP;
Kotaro Yano, Chiba, JP;
Naoki Oyanagi, Chiba, JP;
Other;
Abstract
The present invention comprises a metal bond grind stone having a flat plate portion and a tapered portion ; an electrode opposed to the metal bond grind stone with a gap therebetween; voltage applying means for applying a direct-current pulse voltage between the metal bond grind stone and the electrode; conductive liquid supplying means for supplying a conductive liquid between the metal bond grind stone and the electrode; and grind stone moving means for moving the metal bond grind stone in a direction orthogonal to the shaft center thereof, and an ingot of a single crystal SiC is thereby cut at the tapered portion of the metal bond grind stone and the cut surface is then specular-worked at the flat plate portion