Patent ID: 7727053

Claim:
A double-side polishing method for polishing a wafer, the method comprising: sandwiching the wafer held in a carrier between upper and lower turn tables, wherein each of the upper and lower turn tables has an attached polishing pad; simultaneously polishing both surfaces of the wafer while supplying a slurry to a space between the upper and lower turn tables from a plurality of slurry supply holes provided in the upper turn table; adjusting a polishing amount at an outer peripheral portion of the wafer; and suppressing an outer peripheral sag of the wafer by supplying the slurry such that an amount of the slurry supplied from the slurry supply holes provided on an outer side relative to a center of rotation of the upper turn table becomes larger than twice or more of an amount of the slurry supplied from the slurry supply holes provided on an inner side relative to the center of rotation of the upper turn table at a time of polishing both of the surfaces of the wafer.