公开(公告)号：US11789368B2

公开(公告)日：2023-10-17

申请号：US17764139

申请日：2020-09-14

Applicant: ASML Holding N.V.

Inventor： Yuxiang Lin ,  Joshua Adams ,  Tamer Mohamed Tawfik Ahmed Mohamed Elazhary ,  Krishanu Shome

IPC: G03F7/00

CPC classification number: G03F7/70191 ,  G03F7/7085 ,  G03F7/70091

Abstract: A system (500) includes an illumination system (502), a lens element (506), and a detector (504). The illumination system generates a beam of radiation (510) having a first spatial intensity distribution (800) at a pupil plane (528) and a second spatial intensity distribution (900) at a plane of a target (514). The first spatial intensity distribution comprises an annular intensity profile (802) or an intensity profile corresponding to three or more beams. The lens element focuses the beam onto the target. The second spatial intensity distribution is a conjugate of the first intensity distribution and has an intensity profile corresponding to a central beam (902) and one or more side lobes (904) that are substantially isolated from the central beam. The central beam has a beam diameter of approximately 20 microns or less at the target. The detector receives radiation scattered by the target and generates a measurement signal based on the received radiation.

公开(公告)号：US11175593B2

公开(公告)日：2021-11-16

申请号：US17049707

申请日：2019-04-03

Applicant: ASML Netherlands B.V. ,  ASML Holding N.V.

Inventor： Simon Reinald Huisman ,  Tamer Mohamed Tawfik Ahmed Mohamed Elazhary ,  Yuxiang Lin ,  Vu Quang Tran ,  Sebastianus Adrianus Goorden ,  Justin Lloyd Kreuzer ,  Christopher John Mason ,  Igor Matheus Petronella Aarts ,  Krishanu Shome ,  Irit Tzemah

IPC: G03F9/00 ,  G03F7/20

Abstract: An alignment sensor apparatus includes an illumination system, a first optical system, a second optical system, a detector system, and a processor. The illumination system is configured to transmit an illumination beam along an illumination path. The first optical system is configured to transmit the illumination beam toward a diffraction target on a substrate. The second optical system includes a first polarizing optic configured to separate and transmit an irradiance distribution. The detector system is configured to measure a center of gravity of the diffraction target based on the irradiance distribution outputted from a first polarization branch and a second polarization branch. The processor is configured to measure a shift in the center of gravity of the diffraction target caused by an asymmetry variation in the diffraction target and determine a sensor response function of the alignment sensor apparatus based on the center of gravity shift.

公开(公告)号：US11966169B2

公开(公告)日：2024-04-23

申请号：US17029845

申请日：2020-09-23

Applicant: ASML Holding N.V.

Inventor： Mohamed Swillam ,  Tamer Mohamed Tawfik Ahmed Elazhary ,  Stephen Roux ,  Yuxiang Lin ,  Justin Lloyd Kreuzer

IPC: G03F7/00 ,  G01B11/14 ,  G01B11/27 ,  G02B6/12 ,  G02B6/293 ,  H01L21/67

CPC classification number: G03F7/70633 ,  G01B11/14 ,  G01B11/272 ,  G02B6/12007 ,  G03F7/70575 ,  G03F7/70616 ,  G03F7/7085 ,  G01B2210/56 ,  G02B6/29301 ,  G02B6/29395 ,  G03F7/70608 ,  H01L21/67259

Abstract: A system includes a radiation source, first and second phased arrays, and a detector. The first and second phased arrays include optical elements, a plurality of ports, waveguides, and phase modulators. The optical elements radiate radiation waves. The waveguides guide radiation from a port of the plurality of ports to the optical elements. Phase modulators adjust phases of the radiation waves. One or both of the first and second phased arrays form a first beam and/or a second beam of radiation directed toward a target structure based on the port coupled to the radiation source. The detector receives radiation scattered by the target structure and generates a measurement signal based on the received radiation.

公开(公告)号：US11994808B2

公开(公告)日：2024-05-28

申请号：US17029845

申请日：2020-09-23

Applicant: ASML Holding N.V.

Inventor： Mohamed Swillam ,  Tamer Mohamed Tawfik Ahmed Elazhary ,  Stephen Roux ,  Yuxiang Lin ,  Justin Lloyd Kreuzer

IPC: G03F7/00 ,  G01B11/14 ,  G01B11/27 ,  G02B6/12 ,  G02B6/293 ,  H01L21/67

CPC classification number: G03F7/70633 ,  G01B11/14 ,  G01B11/272 ,  G02B6/12007 ,  G03F7/70575 ,  G03F7/70616 ,  G03F7/7085 ,  G01B2210/56 ,  G02B6/29301 ,  G02B6/29395 ,  G03F7/70608 ,  H01L21/67259

Abstract: A system includes a radiation source, first and second phased arrays, and a detector. The first and second phased arrays include optical elements, a plurality of ports, waveguides, and phase modulators. The optical elements radiate radiation waves. The waveguides guide radiation from a port of the plurality of ports to the optical elements. Phase modulators adjust phases of the radiation waves. One or both of the first and second phased arrays form a first beam and/or a second beam of radiation directed toward a target structure based on the port coupled to the radiation source. The detector receives radiation scattered by the target structure and generates a measurement signal based on the received radiation.

公开(公告)号：US11526091B2

公开(公告)日：2022-12-13

申请号：US17600174

申请日：2020-03-25

Applicant: ASML HOLDING N.V.

Inventor： Tamer Mohamed Tawfik Ahmed Mohamed Elazhary ,  Justin Lloyd Kreuzer ,  Yuxiang Lin ,  Kirill Urievich Sobolev

IPC: G03F9/00

Abstract: Apparatus for, and method of, measuring a parameter of an alignment mark on a substrate in which an optical system is arranged to receive at least one diffraction order from the alignment mark and the diffraction order is modulated at a pupil or a wafer conjugate plane of the optical system, a solid state optical device is arranged to receive the modulated diffraction order, and a spectrometer is arranged to receive the modulated diffraction order from the solid state optical device and to determine an intensity of one or more spectral components in the modulated diffraction order.

公开(公告)号：US20210095957A1

公开(公告)日：2021-04-01

申请号：US17029845

申请日：2020-09-23

Applicant: ASML Holding N.V.

Inventor： Mohamed SWILLAM ,  Tamer Mohamed Tawfik Ahmed Mohamed Elazhary ,  Stephen Roux ,  Yuxiang Lin ,  Justin Lloyd Kreuzer

IPC: G01B11/27 ,  G02B6/12 ,  H01L21/67 ,  G03F7/20

Abstract: A system includes a radiation source, first and second phased arrays, and a detector. The first and second phased arrays include optical elements, a plurality of ports, waveguides, and phase modulators. The optical elements radiate radiation waves. The waveguides guide radiation from a port of the plurality of ports to the optical elements. Phase modulators adjust phases of the radiation waves. One or both of the first and second phased arrays form a first beam and/or a second beam of radiation directed toward a target structure based on the port coupled to the radiation source. The detector receives radiation scattered by the target structure and generates a measurement signal based on the received radiation.

公开(公告)号：US11971665B2

公开(公告)日：2024-04-30

申请号：US17432019

申请日：2020-02-06

Applicant: ASML Holding N.V.

Inventor： Joshua Adams ,  Yuxiang Lin ,  Krishanu Shome ,  Gerrit Johannes Nijmeijer ,  Igor Matheus Petronella Aarts

IPC: G03F9/00

CPC classification number: G03F9/7065 ,  G03F9/7076 ,  G03F9/7088

Abstract: An alignment method includes directing an illumination beam with a first polarization state to form a diffracted beam with a second polarization state from an alignment target, and passing the diffracted beam through a polarization analyzer. The alignment method further includes measuring a polarization state of the diffracted beam and determining a location of the alignment target from the measured polarization state relative to its initial polarization state. The alignment target includes a plurality of diffraction gratings with a single pitch and two or more duty cycles, wherein the pitch is smaller than a wavelength of the illumination beam, and the location of the alignment target corresponds to the duty cycle of the diffraction grating.