بهبود مدیریت کیفیت فرآیند جوشکاری
Abstract
1- Introduction
2- THERMOSONIC GOLD WIRE BONDING
3- Thermosonic gold wire bonding process optimization by using the dispersion analysis method
4- Conclusions
References
Abstract
This scientific paper conducts a study meant to improve the quality management of the thermosonic welding process of gold wires in the automotive industry. Within the large amount of electronic products manufactured worldwide, the gold wire bonding is the preferred technology for creating the needed interconnections in the microelectronic industry. In this paper, the quality management improving starts with an experimental research in the automotive industry, based on the gold wire thermosonic bonding, in terms of: conformal structuring, robustness and integrity of the electrical contacts. The experimental research is based on the processing parameters and on the independent variables and objective processing functions. In order to highlight the impact which one or more factors have on the quality of the thermosonic bonding, the dispersion analysis method was used. According to this, the importance of each factor, but also each factor’s optimization, was underlined. The final goal was to reach a high reliability and quality of the finished goods.
Introduction
The competitive advantage gained through quality by Japanese companies becomes considerable, being further consolidated and amplified by its own dynamics. Revolutionizing production systems, by introducing microelectronics and informatics on a large scale, making flexible manufacturing systems, using high technologies, have made it possible to produce more and more complex products. In order to control the complex processes, a new approach is needed, quite different from simple processes. Integrated Computer Manufacturing (CIM) systems have been developed, in which an imported subsystem is the (CAQ) Computer Aided Quality (Ţîţu & Oprean, 2006). Experimental research is a component of quality assurance and management. Juran (Juran & Gryna, 1973), defines the quality management functions in terms of a “quality trilogy”. In his opinion, the quality management comprises three main management processes: quality planning, quality control and quality improvement. In his view, the planning is aimed primarily to develop the products and processes according to the customers’ requirements. The quality control means to provide a minimum variation range reported to its relative prescribed level. In this purpose, the values of the measured quality characteristics with the standards specifications are compared, establishing in this way the necessary corrective measures on the entire production flow. In the Juran “trilogy” the quality improvement function is considered the most important. The appropriate processes that this function ensure, are, in Juran’s view, the problems elimination that cause the “chronic” quality problems. On the other hand, by improving the quality, the aim is to achieve a higher performance levels required in standards. Therefore, the challenge to be considered, is to provide a higher quality level as against the planned level (Ţîţu, Oprean & Boroiu, 2011).