Patent ID: 9165778
Filing Date: 2015-10-20
Classification: B24B,H01L

Abstract:
1. A system for performing chemical-mechanical planarization, comprising: a polishing pad configured to support an article for chemical-mechanical planarization (CMP), wherein the article includes a CMP stop material; a polishing head configured to perform chemical-mechanical planarization on the article; a light source configured to provide an incident light; a polishing fluid including a plurality of luminescent particles capable of emitting a fluorescent light in response to the incident light; a fluorescence detector configured to detect the intensity of the fluorescent light; and at least one processor coupled to the fluorescent detector and the polishing head, wherein the at least one processor is configured to control the polishing head based on the detected fluorescent light; wherein the luminescent particles are capable of attaching the CMP stop material during CMP and transferring a plurality of electrons or holes to the CMP stop material upon attachment to the CMP stop material.