Patent ID: 8016643
Filing Date: 2011-09-13
Classification: B24B,H01L

Abstract:
1. A method of grinding a rear surface of a wafer having a plurality of dividing lines which are formed in a lattice pattern on a front surface and devices which are formed in a plurality of areas sectioned by the plurality of dividing lines, comprising: forming a protective film by coating the front surface of the wafer with a liquid resin; drying the protective film such that the protective film is solidified; scraping a front surface of the protective film formed on the front surface of the wafer with a rotary scraping tool to form the front surface of the protective film into a flat surface, wherein, as the rotary scrapping tool is rotated, a chuck table supporting the wafer is moved horizontally to flatten the front surface of the protective film; and placing the protective film side of the wafer on a holding surface of the chuck table and grinding the rear surface of the wafer with a grinder to a predetermined thickness.