Patent ID: 6911111
Filing Date: 2005-06-28
Classification: B08B,B24B,H01L

Abstract:
1. A chemical mechanical polishing (CMP) system, comprising: a CMP pad; a carriage that holds at least one device, wherein the CMP pad and carriage are rotatable with respect to each other and movable with respect to each other such that when the at least one device is positioned within the carriage the at least one device can be brought into contact with the CMP pad; a slurry supply system that supplies a slurry to an interface between the CMP pad and the at least one device such that the combination of the slurry and the movement between the CMP pad and the at least one device results in removal of material from the at least one device; a cleaning pad that rotates with respect to the CMP pad; a cleaning solution supply system that supplies a cleaning solution to the interface between the cleaning pad and the CMP pad wherein the combination of the cleaning solution and the movement between the cleaning pad and the CMP pad results in removal of contaminants from the CMP pad; a cleaning solution analyzing system that analyzes the cleaning solution after the cleaning solution has been introduced to the interface between the CMP pad and the cleaning pad and determines, based upon the analysis the cleanliness of the CMP pad following the supply of the cleaning solution to the interface; and a carriage that moves the cleaning solution analyzing system with respect to the CMP pad to permit periodic evaluation of the cleanliness of the CMP pad following CMP of the at least one device.