Patent ID: 9393665
Filing Date: 2016-07-19
CPC Classification: B24B

Claim Text:
1. A polishing method, comprising: providing a first polishing pad having a plurality of first high polishing rate regions and a plurality of first low polishing rate regions, the plurality of first high polishing rate regions comprising a first plurality of lands, and the plurality of first low polishing rate regions comprising a first plurality of grooves, wherein the lands and grooves of the first polishing pad are in an alternating pattern; providing a second polishing pad having a plurality of second high polishing rate regions and a plurality of second low polishing rate regions, the plurality of second high polishing rate regions comprising a second plurality of lands, and the plurality of second low polishing rate regions comprising a second plurality of grooves, wherein the lands and grooves of the second polishing pad are in an alternating pattern; setting a polishing article on the first polishing pad to perform a first polishing process; and moving the polishing article onto the second polishing pad to perform a second polishing process, wherein a rotational center of the polishing article is constantly corresponding to one of the first high polishing rate regions during the entirety of the first polishing process and is constantly corresponding to one of the second low polishing rate regions during the entirety of the second polishing process; or the rotational center of the polishing article is constantly corresponding to one of the first low polishing rate regions during the entirety of the first polishing process and is constantly corresponding to one of the second high polishing rate regions during the entirety of the second polishing process.