Design of Experiment on Ultra Violet Curing Die Attach Film by Using Taguchi Method to Optimize Quality

The highly growth on semiconductor manufacturing field makes the expertise on the semiconductor manufacturer industry keep on struggle to create higher speed, smaller, highly integrated and more reliable and powerful chips for various needs. The new technology in making chips process continuously developed to produce goods semiconductor. Product and process optimization was a crucial part in manufacturing production line to produce high volume throughput with reducing in lead times, engineering changes and development cost but with higher quality. Engineering particularly decisions be the most important side in making the process properly in reaching the zero defect target. Every single thing has to be concerned, whether it is from technical parts to managerial parts in order to ensure the process going smoothly and efficiently with excellent quality. For this project, I am going deeper inside the chips assembling process whereby the post Ultra Violet curing process on Die Attach film, DAF tape have been experimented by using Taguchi approach for the process to produce better chips on stacked die package. An application of experimental design, based upon the works of Dr.Genichi Taguchi was conducted at the die attach film (DAF) curing operation. The experiment focused on parameter design, the determination of the DAF operation parameters that significantly affect the quality and semiconductor chip reliability of the wafer mounted on wafer ring during curing and selecting the optimum parameter level combination. In semiconductor manufacturing industry, the usage of epoxy resin bleed is no longer convenient in producing thin die stacked package with high volume. Hence, industry in about to move to the Die attach film (DAF) tape type to replace with the epoxy resin bleed. The new process should the tape go through is UV curing process, indeed the characteristics of the tape adhesion affecting much to yield and quality. Parameter optimization has resulted to a reduction in die defects and adjustment of the mean to the nominal of zero defects for all the quality characteristics. Continuations on the optimizing UV curing DAF tape process is moving on with the inspection data gathered which is die shear strength, top and flip side chipped and tape residue whiskering. Furthermore, evaluation effect onto the process which is the die shear strength test, inspection has been taken into account particularly.