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. 18, 2014
Filed:
Dec. 01, 2011
Takashi Okamura, Ota-Ku, JP;
Hitoshi Hoshino, Ota-Ku, JP;
Takashi Okamura, Ota-Ku, JP;
Hitoshi Hoshino, Ota-Ku, JP;
Disco Corporation, Tokyo, JP;
Abstract
A sapphire wafer dividing method including a modified layer forming step of forming a plurality of modified layers inside a sapphire wafer along a plurality of crossing division lines formed on the front side where a light emitting layer is formed, and a chamfering and dividing step of forming a plurality of cut grooves on the back side of the sapphire wafer along the division lines, thereby dividing the sapphire wafer into individual light emitting devices along the modified layers as a division start point, wherein the corners of the back side of each light emitting device are chamfered by the formation of the cut grooves in the chamfering and dividing step.