Patent ID: 9186774
Filing Date: 2015-11-17
Classification: B24B

Abstract:
1. A method of controlling a polishing operation, comprising: receiving a first measurement of a first amount of metal on a substrate made by a first x-ray monitoring system after a first metal layer is deposited on the substrate and before a second metal layer is deposited on the substrate; transferring the substrate to a carrier head of a chemical mechanical polishing apparatus after the second metal layer is deposited on the substrate; polishing the second metal layer; after polishing at least a portion of the second metal layer, making a second measurement of a second amount of metal on the substrate with a second x-ray monitoring system in the chemical mechanical polishing apparatus; comparing the first measurement made before the second metal layer is deposited to the second measurement made after the second metal layer is deposited and at least the portion of the second metal layer is polished to determine a difference; and adjusting a polishing endpoint or a polishing parameter of the polishing apparatus based on the difference.