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. 30, 2019
Filed:
Mar. 08, 2013
Lumileds Llc, San Jose, CA (US);
Frank Lili Wei, Eindhoven, NL;
Lumileds LLC, San Jose, CA (US);
Abstract
A two-stage singulation process is used in the fabrication of phosphor coated light emitting elements. Prior to the application of the phosphor coating, the individual light emitting elements are singulated using a laser dicing process (); after application of the phosphor coating (), the phosphor coated light emitting elements are singulated using a mechanical dicing process (). Before laser dicing of the light emitting elements, the wafer is positioned on a piece of dicing- or die-attach-tape held by a frame; after laser dicing, the tape is stretched () to provide space between the individual light emitting elements that allows for the wider kerf width of the subsequent mechanical dicing () after application of the phosphor coating ().