Highly-efficient Polishing Technology for Glass Substrates Using Tribo-chemical Polishing with Electrically Controlled Slurry

摘要

The outstanding advantage of the novel polishing technology developed by the authors is a considerable reduction in ceriumrnoxide consumption for polishing of glass substrates. This has been realized by introducing tribo-chemical polishing methodrnalong with a technique to control the movement of abrasives using an AC electric field. In this paper, we have analyzed therncharacteristics of the new polishing technique from the viewpoint of slurry distribution in the polishing area under variousrnelectric field conditions using a digital image processing and its influence on polishing performance using the experimentalrnsetup consisting of high speed polishing method under AC electric field. The results confirmed the increase of slurryrndistribution in the polishing area under appropriate AC electric field conditions and consequently led to enhanced removal rate,rnwhich was 2.5 times higher than that of the conventional CMP (Chemical Mechanical polishing) method. Furthermore, in spiternof enhanced removal rate the surface roughness was comparable to CMP method.