| Summary: | 碩士 === 國立高雄科技大學 === 工業工程與管理系 === 107 === The study case originally produced the important component of thin film transistor liquid crystal display (TFT-LCD)- color filter (CF). With the change of the manufacturing supply chain, the competition increased and fierce. There are more manufacturers of CF than capactitive touch sensor (TS) and the similarity of the process is high. The case dicided to increase the production of TS. Because the production technology of TS is not mature. Therefore, improving yield loss needs to be solved in this case.
The Lean Six Sigma (LSS) model combines the Lean Manufacturing (Lean) and Six Sigma (6σ) theory to integrate the improvement activities of the company. Many quality improvement tools such as Design of Experiments (DOE) are applied in the improvement project. Taking this research case as an example, we will promote continuous improvement activities for the quality of the case study through the Lean Six Sigma. The project is defined in five phases of Define, Measure, Analyze, Improve, Control (DMAIC). After a long period of quality improvement, the problem of contamination pollution still accounts for ~30% of the total variation. In addition to the external problem, there is also the fail of communication caused by dirt or peeling. Therefore, the case was established to improve the dirt defect by setting up Lean Six Sigma project, and the project goal was to reduce the proportion to 0.18%. After three months of improvement and three months of continuous observation, the abnormal proportion of pollution decreased from 0.35% of the overall average defect loss to 0.13% (the improvement rate reached 63%). It is estimated that the entire product can generate 3 million (USD) of performance for the case in one year. It is also possible to increase the customer’s satisfaction and the company’s technical competitiveness by improving yield and achieving the continuous improvement of objectives.
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