Patent ID: 11945075
Assignee: EBARA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 15:
16. A polishing apparatus that polishes a substrate placed on and in slidable contact with a polishing member, comprising:
a dresser that dresses the polishing member by moving on the polishing member, a moving speed of which is adjustable in a plurality of scanning areas set on the polishing member along a moving direction;
a height detection section that measures a surface height of the polishing member in a plurality of monitoring areas set in advance on the polishing member along the moving direction of the dresser;
a dress model matrix creation section that creates a dress model matrix defined from the plurality of monitoring areas and the plurality of scanning areas;
an evaluation index creation section that calculates an evaluation index based on a deviation from the target cut amount, a deviation from the staying time according to a reference recipe and a speed difference between neighboring scanning areas, the deviation from the target cut amount being a square value of the difference between the target cut amount and a wear amount of the polishing member calculated based on the dress model matrix;
a moving calculation section that calculates the moving speed in each scanning area of the dresser based on the evaluation index; and
a parameter setting section that automatically changes at least one of a parameter for determining the target cut amount or a parameter to determine the evaluation index.