차량용 백색 LED 패키지의 색 좌표 품질 개선

• Published in: 品質經營學會誌 Vol. 50; no. 3; pp. 425 - 440
• Main Authors: 소순진, So Soon Jin, 정충우, Jeong Chung Woo, 문태을, Moon Tae Eul, 김정빈, Kim Jeong Bin, 홍성훈, Hong Sung Hoon
• Format: Journal Article
• Language: Korean
• Published: 한국품질경영학회 30.09.2022
• Subjects: Chromaticity Coordinate; DMAIC Roadmap; LED Packages; Quality; Six Sigma; 학제간연구; Chromaticity Coordinate; DMAIC Roadmap; Six Sigma; Quality; LED Packages
• ISSN: 1229-1889; 2287-9005
• DOI: 10.7469/JKSQM.2022.50.3.425

Purpose: The purpose of this paper is to improve the chromaticity coordinate quality of white LED packages for automobiles that require high quality and reliability. Methods: The project follows the structured methodology of the Six Sigma DMAIC Roadmap, which consists of Define, Measure, Analyze, Improve and Control phases. Results: A CTQ is determined based on COPQ analysis, and a process map and a XY matrix are utilized for selecting process input variables. Three vital Few Xs are identified through data analysis; amount to mix at one time, deviation by head pumps, and deviation by production magazines, and process improvements are performed for each of the three vital Few Xs. Conclusion: The improved process conditions for the three vital Few Xs are applied to the production line, and the results show that the percent defective of chromaticity coordinate has improved from 1.59% to 0.63% and a financial effect of about 50 million won per year is obtained.