Applying impact-absorbing liquid between rotating plates reduces vertical force and prevents surface defects on thin synthetic quartz substrates.
Inverting slurry supply to the upper plate prevents wafer displacement, while optimizing carrier hole area ratios ensures uniform distribution.
Phosphonic acid rate accelerators and amphoteric surfactant corrosion inhibitors in the slurry suppress static etching while maintaining high removal rates.
A synthetic grindstone with a porous nonwoven-fabric binder suppresses excessive frictional heat and prevents surface burns on the workpiece.