Patent ID: 7597606

Claim:
A polishing apparatus, comprising: a polishing platen rotating and carrying a polishing pad thereon; a substrate carrier holding a substrate to be processed and urging said substrate to said polishing pad while rotating said substrate; a slurry supply mechanism supplying slurry to said polishing pad; and first and second conditioners each holding a conditioning disk for conditioning said polishing pad, said first and second conditioners urge said conditioning disks to said polishing pad while rotating said conditioning disks; wherein said first and second conditioners have thereon diamond abrasive grains, and a surface roughness of said first conditioner is different than a surface roughness of said second conditioner, wherein said polishing apparatus further includes a control unit, said control unit controlling said first and second conditioners, in said polishing platen, such that said polishing pad mounted upon said polishing platen is applied with conditioning repeatedly with said first conditioner during each time a substrate is polished and such that said polishing pad is applied with conditioning with said second conditioner intermittently when a total conditioning time of said first conditioner has reached a predetermined time.