Title:
METHOD FOR MANUFACTURING MIDDLE PLATFORM DEVICE FOR LED CHIP TEST PERFORMED BEFORE TRANSFER OF LED CHIPS TO DISPLAY PANEL
Document Type and Number:
WIPO Patent Application WO/2022/035065
Kind Code:
A1
Abstract:
The present invention relates to a method for manufacturing a middle platform (MPF), which is a substrate of an intermediate step for enabling, prior to the transfer of micro-sized LED chips to a display panel at a pitch distance that is the same as that of the display panel or at an integer multiple pitch distance, the LED chips to be 1:1 transferred to the display panel after passing through all electrical and optical tests. A method for manufacturing an MPF device for an LED chip test performed before the transfer of LED chips to a display panel, according to an implementation aspect of the present invention, may comprise: a substrate preparation step of preparing a substrate; an adhesive coating step of coating the substrate with an adhesive; a chip arrangement step of transferring/arranging an RGB chip pixel array to/on the adhesive of the substrate; a hardening step of hardening the adhesive after transferring/arranging RGB chip pixel arrays; a pad area extension and exposure step of performing passivation in order to extend an electrode pad and exposing the electrode pad; an extended pad forming step of extending the electrode pad by depositing metal on the exposed electrode pad; and a measurement step of placing a probe card in an extended state of the electrode pad to electrically connect the probe card to each RGB chip, and then performing electrical and optical tests.
Inventors:
MIN JAE SIK (KR)
LEE JAE YEOP (KR)
PARK JAE SUK (KR)
CHO BYOUNG GU (KR)
LEE JAE YEOP (KR)
PARK JAE SUK (KR)
CHO BYOUNG GU (KR)
Application Number:
PCT/KR2021/009054
Publication Date:
February 17, 2022
Filing Date:
July 14, 2021
Export Citation:
Assignee:
LIGHTIZER CO LTD (KR)
International Classes:
H01L21/66; H01L21/52; H01L21/56; H01L21/78; H01L25/075
Foreign References:
| JP2005049131A | 2005-02-24 | |||
| KR20100132536A | 2010-12-17 | |||
| KR100295916B1 | 2001-10-26 | |||
| KR20170057512A | 2017-05-25 | |||
| KR20200010590A | 2020-01-30 |
Attorney, Agent or Firm:
PARK, Yang Ho (KR)
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