Patent ID: 6428395
Filing Date: 2002-08-06
Classification: B08B,B24B,H01L

Abstract:
A method of polishing at least one surface of a silicon-based part made of SiO2, of SiC, of glass, of vitro-ceramic, or of quartz, the method comprising:a) a coarse-polishing stage implementing at least one coarse-polishing element and an abrasive to remove a first surface layer having a first thickness and to confer a first roughness to said surface; b) a polishing stage implementing at least one polishing element and a liquid containing a polishing abrasive to remove a second surface layer having a second thickness smaller than the first thickness and to confer to said surface a second roughness that is smaller than the first roughness; and c) a finishing stage by soft abrasion implementing at least one finishing element and a soft abrasive, to remove a third surface layer having a third thickness sufficient thickness to improve a flux strength of the part, the third thickness being smaller than the second thickness.