Patent ID: 6772620
Filing Date: 2004-08-10
Classification: H01L

Abstract:
A method of generating a set of calibration data for correlating the relative height of a first feature with respect to a second feature with the difference in dishing between a first calibration feature and a second calibration feature with respect to said dishing of said first calibration feature, wherein said first calibration feature has approximately the same dishing rate as said first feature and said second calibration feature has approximately the same dishing rate as said second feature, said method comprising:providing a sample substrate having said first calibration feature of a first material surrounded by a second material and having said second calibration feature, wherein said first calibration feature and said second calibration feature have different dishing rates;. processing said sample substrate to produce dishing of said first and second calibration features; measuring actual dishing values of said first and second calibration features; calculating a difference in actual dishing values between said first and second calibration features; and producing calibration data by relating said difference in actual dishing values between said first and second calibration features to the actual dishing of said first calibration feature.