Patent ID: 6923709
Filing Date: 2005-08-02
Classification: B24B

Abstract:
1. A CMP apparatus, comprising: a polishing table; a wafer loading/unloading device located at a side of the polishing table; a measuring device located outwardly of a peripheral edge of the polishing table; a carrier having a first lateral and a second lateral opposite the first lateral, wherein the first lateral faces the polishing table, the wafer loading/unloading device or the measuring device; a guide ring disposed on the first lateral of the carrier; and a transfer device disposed on the second lateral of the carrier and connected to the carrier, wherein the transfer device is used to move the carrier onto the polishing table, the wafer loading/unloading device or the measuring device, wherein the measuring device has an unimpeded view of the guide ring so as to be able to measure severity of a scoring on the guide ring.