公开(公告)号：US10948832B2

公开(公告)日：2021-03-16

申请号：US16500933

申请日：2018-03-06

Applicant: ASML Netherlands B.V.

Inventor： Nick Kant ,  Robertus Martinus Alphonsus Van Herpen ,  Mark Louwrens Beks ,  Lense Hendrik-Jan Maria Swaenen ,  Nico Vanroose ,  James Robert Downes

IPC: G03F7/20

Abstract: A method of reducing an aberration arising during operation of a lithographic apparatus, the method comprising measuring the aberration to obtain an aberration signal, the aberration signal comprising a first component and a second component, wherein the first component of the aberration signal comprises a first frequency band and the second component of the aberration signal comprises a second frequency band, wherein the first frequency band comprises frequencies that are higher than frequencies comprised in the second frequency band, calculating a correction, wherein a first part of the correction is calculated based on the first component of the aberration signal, and applying the correction to the lithographic apparatus.

公开(公告)号：US10451977B2

公开(公告)日：2019-10-22

申请号：US15527254

申请日：2015-11-30

Applicant: ASML NETHERLANDS B.V.

Inventor： Nick Kant ,  Nico Vanroose ,  Johannes Jacobus Matheus Baselmans

IPC: G03F7/20 ,  G01M11/02

Abstract: A method of reducing an aberration of a lithographic apparatus, the method including measuring the aberration, taking the measured aberration into account, estimating a state of the lithographic apparatus, calculating a correction using the estimated state, and applying the correction to the lithographic apparatus.