摘要(英) |
The main application of polishing pad is workpiece surface planarization. When wear apply to traditional polishing pad, pad glazing also occurred, and slurry is difficult to circulate in its 2 dimension structure pores, and traditional polishing pad’s price is expensive. In our research, we use coated abrasive pad which can improve abrasive utilization rate, and slurry can easily circulate in its 3 dimension structure pores, besides, EVA is cheaper than other material of polishing pad.
The investigation of this study was divided into two parts. The first part is the fabrication of coated abrasive EVA hot-melt pad. The experiment proves that under the setting of temperature 75 ℃, coating 4.5 and 1.2μm diameter SiC, coating time 90 sec, coating pressure 80 g/cm2 , the EVA hot-melt pad has the superior coating effect. The second part is to use Taguchi method experiment on silicon wafer polishing. The results indicate that the abrasive size, slurry concentration and pad absorption time are the obvious parameters for silicon wafer polishing. However during the polishing process the abrasive may fall off from coated abrasive pad, so this study compare the characteristic with coated abrasive pad and mixed abrasive pad. The experiment proves that using mixed 5wt% 1.2 μm abrasive pad in silicon polishing, the roughness of silicon wafer is better than using coated abrasive pad and traditional wool pad.
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