| dc.description.abstract | Printed circuit boards are an important foundation in technology products. Technology products must have many electronic components and chips mounted on the printed circuit board. Therefore, the quality of the printed circuit board also affects the quality and life of the technology product. With the rapid replacement of technological products around the world, printed circuit board companies are facing constant demands from major customers to improve product quality and delivery speed. This is undoubtedly a big challenge for printed circuit board companies, but for small and medium-sized enterprises in such a competitive environment in Taiwan, not only have to face the advantages of leading companies in the same industry to grab orders, but even leading companies will not hesitate to decline prices or provide free replacements to ensure product quality, coupled with high customer requirements and international manufacturers’ price and developing competitiveness.
The company in this case study is a small and medium-sized enterprise. In its budget and orders, not only it cannot follow up the capital operation immediately like a large enterprise, but the technology, manpower, and equipment production capacity cannot be quickly put in place. These small and medium-sized enterprises with limited resources can improve product quality in order to reduce waste. It is relatively easy for medium-sized enterprise to indirectly increase the profitability of the company by using the amount of scrapped products. The quality control circle came into being in the early stage to solve the problems of many manufacturing factories. Due to the significant improvement effect, the quality control circle activities have also begun to be widely used by schools, hospitals, and other private organizations. However, with the increasing competition among enterprises, in order to apply its concepts more widely to the problems faced by other enterprises, the quality control circle has also changed from being limited to the same department, grassroots staff members, and small-scale characteristics of the enterprise to a cross-departmental nature. It called QIT method.
This research uses QIT method, which has a cross-departmental nature, as the main process architecture. First, Plato method is used to find the most frequently occurring quality defects, and through brainstorming with the person of the manufacturing department, process department, equipment department, and quality assurance department Various factors in people, machine, material, and method, and verify whether each factor is the real cause. Finally, it was confirmed through the transition diagram that the defect rate of copper exposed on the solder resist paint surface was about 0.300% before the improvement measures were implemented, but after the measures were implemented, the defect rate of copper exposed on the solder resist paint surface quickly dropped below 0.150% and maintained for four consecutive weeks. Below 0.150%, it is effective to stick industrial sticky paper at the intersection of the conveyor belt inside the UV baking machine during the solder resist paint process, and replace the sticky paper every day. Through this series of quality improvement execution steps and methods, the product quality of the individual company can indeed be improved. Of course, the quality of a factory is not the best but better. Therefore, this series of execution methods can be continuously applied to other quality shortcomings. Ensure the continuous improvement of the quality of the factory. | en_US |