Control strategy of burr formation at sawing process for the improvement of sawn package

Tan, Zhen Qi (2018) Control strategy of burr formation at sawing process for the improvement of sawn package. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The study in this project is a real problem from the industry. First of all, the sawn package is a new design development process which the side wall of the package is plated with the NiP-Au material. It is found that the burr arise on the edge of the top edge of chip unit after the sawing process. Micro-etching process is needed to be carry out to reduce the burr height. But delamination occurred during 15 minutes chemical deburring process. To avoid delamination, chemical deburring process need to reduce from 15 minutes to 30 seconds. But, while the chemical deburring process reduce to 30 seconds, burr height produced by high speed sawing no able to clean to meet defined specification which is less than 0.05mm. Hence, the aim in this project is to minimize the burr formation on the chip unit to meet the defined specification less than 0.05mm. The objectives of the research is to investigate the impact of the significant factors towards burr formation during the saw process and to optimize saw process by using DOE approach to fulfil burr defined specification less than 0.05mm. The proposed idea for this research is to control the machining cutting speed, spindle rotation and type of diamond blade. The Design of Experiment with Taguchi method and S/N ratio analysis is used in this research. The result of successful accepted points achieved 95% which had an improvement of 21.33% compared to the first trial run experiment. As a conclusion, the objectives of this project are achieved. The impact of the significant factors towards burr formation during the saw process had been investigated and saw process had been optimized by using DOE approach to fulfil burr height defined specification which is less than 0.05mm.

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