Title:
METHOD FOR MANUFACTURING HIGH EFFICIENCY MICRO LED MODULE
Document Type and Number:
WIPO Patent Application WO/2019/103291
Kind Code:
A1
Abstract:
Disclosed is a method for manufacturing a high efficiency micro LED module. The method for manufacturing the high efficiency micro LED module comprises the steps of: preparing a micro LED by growing an epitaxial layer on a sapphire substrate, forming a plurality of LED cells on the epitaxial layer, forming a plurality of individual electrode pads so that one individual electrode pad is allocated to each of the plurality of LED cells, and forming a common electrode pad in an area around the plurality of LED cells; preparing a submount substrate which comprises a plurality of individual electrodes corresponding to the plurality of individual electrode pads and a common electrode corresponding to the common electrode pad; mounting the micro LED on the submount substrate such that a plurality of bonding connecting portions connect between the plurality of individual electrodes and the plurality of individual electrode pads and between the common electrode pad and the common electrode; forming a buffer layer between the micro LED and the submount substrate; and irradiating a laser near a boundary between the sapphire substrate and the epitaxial layer to separate the sapphire substrate from the epitaxial layer, wherein the buffer layer absorbs energy generated by the laser between at least neighboring LED cells, thereby suppressing damage to the epitaxial layer or the submount substrate.
Inventors:
YOO TAEKYUNG (KR)
Application Number:
PCT/KR2018/010393
Publication Date:
May 31, 2019
Filing Date:
September 06, 2018
Export Citation:
Assignee:
LUMENS CO LTD (KR)
International Classes:
H01L25/075; H01L33/00; H01L33/12; H01L33/36; H01L33/62
Foreign References:
| US20150340346A1 | 2015-11-26 | |||
| JP6131374B1 | 2017-05-17 | |||
| US20170236811A1 | 2017-08-17 | |||
| KR101513641B1 | 2015-04-22 | |||
| KR20130104518A | 2013-09-25 |
Attorney, Agent or Firm:
RYU, Changyeol (KR)
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