Disassembly of the Package/PCB on Wasted LED Light and their Characterizations

Seunghyun Kim; Ha Bich Trinh; Taehun Son; Jaeryeong Lee

doi:10.7844/kirr.2023.32.6.3

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2023 Vol.32, Issue 6 Next Page

Research Paper

Disassembly of the Package/PCB on Wasted LED Light and their Characterizations LED 조명 모듈에 장착된 패키지/PCB의 분리 및 특성

31 December 2023. pp. 3-9

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Abstract

Separation of LED packages from PCBs and analysis of the adhesive components was conducted to enhance the recycling potential of LED modules. LED package was separated from PCBs using heat treatment under optimal conditions: temperature of above 250 °C and time of 20 minutes. The separation equipment can be established using a hot air injector with controlling the rotational speed of the internal screw. The separation efficiency of each type of substrate (aluminum and glass fiber) was investigated with the thickness range of the adhesive materials (0.25-0.30 and 0.30-0.35 mm). Under the optimal conditions, the efficiency can reach to 97.5% for both types of substrates with adhesive materials of thickness 0.25~0.30mm. Characterization of the residual adhesive substances from the separated LED package and PCB using microwave digestion and ICP analysis showed that the residue contained of 95% of Sn, less than 5% of Cu and Ag.

Keywords

LED module

LED package

PCB

Heat treatment

Separation

LED 조명 모듈의 재활용을 위해 LED 패키지-PCB로 분리하고 선별하기 위한 분리장치를 제작하였고, 제작된 장비를 이용하여 부품분리실험을 진행하였다. 또한 분리된 LED 모듈과 패키지로부터 접착성분을 수거하여 분석을 진행하였다. 분리장비 제작을 위해 LED 패키지-PCB 분리 기초실험을 진행하였으며 분리에 필요한 최적조건으로 250 ℃이상의 온도조건, 20분 이상의 체류시간이 필요하다 판단하였다. 이러한 결과를 바탕으로 제작된 분리장비를 이용한 LED 패키지-PCB 분리실험은 온도 변화(150, 200, 250 ℃), 체류시간(5, 10, 20분)의 조건변화에 따른 분리율을 확인하였으며 최적 분리 조건을 도출하였다. 또한 시료의 기판의 종류(알루미늄, 유리섬유) 및 접착물질의 두께(0.25~0.30, 0.30~0.35 mm)별 분리 효율을 확인하였다. 최적조건으로 반응 온도 250 ℃, 체류시간 20분에서 기판의 종류엔 상관없이 접착물질의 두께 0.25~0.30mm에서 97.5% 분리를 확인하였다. 분리된 LED 패키지와 PCB로부터 잔류 접착물질을 수거하여 분석한 결과 Sn이 95% 이상 존재하는 것을 확인하였으며 5% 미만의 Cu, Ag가 확인되었다.

키워드

LED 모듈

LED 패키지

PCB

열처리

부품분리

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 32
No :6
Pages :3-9
Received Date : 2023-11-06
Revised Date : 2023-11-22
Accepted Date : 2023-11-23
DOI :https://doi.org/10.7844/kirr.2023.32.6.3

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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