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:
Aug. 12, 2008
Filed:
Jun. 01, 2006
Kazumi Hara, Suwa, JP;
Kazumi Hara, Suwa, JP;
Seiko Epson Corporation, , JP;
Abstract
A manufacturing method for a semiconductor device, includes: preparing a semiconductor wafer having an active surface, a side surface, a rear surface on the side opposite the active surface, and a plurality of semiconductor elements formed on the active surface; forming the side surface of the semiconductor wafer so that an angle defined by at least a portion of the side surface of the semiconductor wafer and the rear surface of the semiconductor wafer becomes an acute angle; and performing a spin etching in which etching liquid is dripped onto the rear surface of the semiconductor wafer while blowing air toward the active surface of the semiconductor wafer and toward the side surface of the semiconductor wafer and while rotating the semiconductor wafer.