Six sigma methodology in improving assembly yield of high-power and high-brightness ligth-emitting diodes packages for automotive application

Six sigma methodology had been adopted by various companies such as Motorola, General Electric and Honeywell to improve quality of the product. Six sigma methodology is a systematic, well-disciplined and scientific-driven famous approach to improve process and reduce defeat. Package development and assembly of high power and high brightness LED for automotive application is a challenging task. It involves various new technologies and processes to enable the assembly of high performance LED package with stringent reliability, thermal, optical and quality requirement. The six sigma project improvement in this paper involves defects reduction in processes of multi-array thermosonic gold to gold interconnects bonding, ceramic substrate to lead frame AuSn eutetic bonding and aluminum ribbon bonding. This paper will discuss every steps involved in DMAIC approach for six sigma methodology. The yield of the processes involved in six sigma project charter scopes had improved after completion of the six sigma project. The result from yield compilation indicates six sigma approach can help company in term of quality management and business growth.