Patents by Inventor Xuerang Hu

Xuerang Hu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20240079204
    Abstract: A method of detecting charged particles may include detecting beam intensity as a primary charged particle beam moves along a first direction; acquiring a secondary beam spot projection pattern as the primary charged particle beam moves along a second direction; and determining a parameter of a secondary beam spot based on the acquired secondary beam spot projection pattern. A method of compensating for beam spot changes on a detector may include acquiring a beam spot projection pattern on the detector, determining a change of the beam spot projection pattern, and adjusting a parameter of a detector cell of the detector based on the change. Another method may be provided for forming virtual apertures with respect to detector cells of a detector.
    Type: Application
    Filed: December 8, 2021
    Publication date: March 7, 2024
    Applicant: ASML Netherlands B.V.
    Inventors: Yongxin WANG, Oleg KRUPIN, Weiming REN, Xuerang HU, Xuedong LIU
  • Publication number: 20240071711
    Abstract: Disclosed herein is an apparatus comprising: a first electrically conductive layer, a second electrically conductive layer; a plurality of optics element s between the first electrically conductive layer and the second electrically conductive layer, wherein the plurality of optics elements are configured to influence a plurality of beams of charged particles; a third electrically conductive layer between the first electrically conductive layer and the second electrically conductive layer; and an electrically insulating layer physically connected to the optics elements, wherein the eclectically insulating layer is configured to electrically insulate the optics elements from the first electrically conductive layer, and the second electrically conductive layer.
    Type: Application
    Filed: September 28, 2023
    Publication date: February 29, 2024
    Inventors: Xuerang HU, Weiming REN, Xuedong LIU, Zhong-wei CHEN
  • Patent number: 11887807
    Abstract: A multi-beam apparatus for observing a sample with high resolution and high throughput is proposed. In the apparatus, a source-conversion unit forms plural and parallel images of one single electron source by deflecting plural beamlets of a parallel primary-electron beam therefrom, and one objective lens focuses the plural deflected beamlets onto a sample surface and forms plural probe spots thereon. A movable condenser lens is used to collimate the primary-electron beam and vary the currents of the plural probe spots, a pre-beamlet-forming means weakens the Coulomb effect of the primary-electron beam, and the source-conversion unit minimizes the sizes of the plural probe spots by minimizing and compensating the off-axis aberrations of the objective lens and condenser lens.
    Type: Grant
    Filed: January 23, 2023
    Date of Patent: January 30, 2024
    Assignee: ASML Netherlands B.V.
    Inventors: Weiming Ren, Xuedong Liu, Xuerang Hu, Zhongwei Chen
  • Publication number: 20240014003
    Abstract: A multi-beam apparatus for observing a sample with high resolution and high throughput and in flexibly varying observing conditions is proposed. The apparatus uses a movable collimating lens to flexibly vary the currents of the plural probe spots without influencing the intervals thereof, a new source-conversion unit to form the plural images of the single electron source and compensate off-axis aberrations of the plural probe spots with respect to observing conditions, and a pre-beamlet-forming means to reduce the strong Coulomb effect due to the primary-electron beam.
    Type: Application
    Filed: June 30, 2023
    Publication date: January 11, 2024
    Applicant: ASML Netherlands B.V.
    Inventors: Shuai LI, Weiming REN, Xuedong LIU, Juying DOU, Xuerang HU, Zhongwei CHEN
  • Patent number: 11854765
    Abstract: Systems and methods of mitigating Coulomb effect in a multi-beam apparatus are disclosed. The multi-beam apparatus may include a charged-particle source configured to generate a primary charged-particle beam along a primary optical axis, a first aperture array comprising a first plurality of apertures having shapes and configured to generate a plurality of primary beamlets derived from the primary charged-particle beam, a condenser lens comprising a plane adjustable along the primary optical axis, and a second aperture array comprising a second plurality of apertures configured to generate probing beamlets corresponding to the plurality of beamlets, wherein each of the plurality of probing beamlets comprises a portion of charged particles of a corresponding primary beamlet based on at least a position of the plane of the condenser lens and a characteristic of the second aperture array.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: December 26, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Weiming Ren, Xuedong Liu, Xuerang Hu, Zhong-wei Chen, Martinus Gerardus Johannes Maria Maassen
  • Publication number: 20230411110
    Abstract: A multi-beam apparatus for multi-beam inspection with an improved source conversion unit providing more beamlets with high electric safety, mechanical availability and mechanical stabilization has been disclosed. The source-conversion unit comprises an image-forming element array having a plurality of image-forming elements, an aberration compensator array having a plurality of micro-compensators, and a pre-bending element array with a plurality of pre-bending micro-deflectors. In each of the arrays, adjacent elements are placed in different layers, and one element may comprise two or more sub-elements placed in different layers. The sub-elements of a micro-compensator may have different functions such as micro-lens and micro-stigmators.
    Type: Application
    Filed: May 5, 2023
    Publication date: December 21, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Xuerang HU, Xuedong LIU, Weiming REN, Zhong-wei CHEN
  • Publication number: 20230377831
    Abstract: A method of operating a secondary imaging system of a charged particle beam apparatus may include using an anti-scanning mode. Excitation of a component of the secondary imaging system may be adjusted synchronously with a primary scanning deflection unit. Together with an anti-scanning deflection unit performing anti-scanning, a component of the secondary imaging system, such as a lens, may be adjusted in step. As scanning and anti-scanning is performed, excitation parameters of the component may also be constantly updated.
    Type: Application
    Filed: September 2, 2021
    Publication date: November 23, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Oleg KRUPIN, Weiming REN, Xuerang HU, Xuedong LIU
  • Publication number: 20230360877
    Abstract: Disclosed herein is an apparatus comprising: a source of charged particles configured to emit a beam of charged particles along a primary beam axis of the apparatus; a condenser lens configured to cause the beam to concentrate around the primary beam axis; an aperture; a first multi-pole lens; a second multi-pole lens; wherein the first multi-pole lens is downstream with respect to the condenser lens and upstream with respect to the second multi-pole lens; wherein the second multi-pole lens is downstream with respect to the first multi-pole lens and upstream with respect to the aperture.
    Type: Application
    Filed: May 8, 2023
    Publication date: November 9, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Xuedong LIU, Qingpo XI, Youfei JIANG, Weiming REN, Xuerang HU, Zhongwei CHEN
  • Patent number: 11804356
    Abstract: Disclosed herein is an apparatus comprising: a first electrically conductive layer; a second electrically conductive layer; a plurality of optics element s between the first electrically conductive layer and the second electrically conductive layer, wherein the plurality of optics elements are configured to influence a plurality of beams of charged particles; a third electrically conductive layer between the first electrically conductive layer and the second electrically conductive layer; and an electrically insulating layer physically connected to the optics elements, wherein the electrically insulating layer is configured to electrically insulate the optics elements from the first electrically conductive layer, and the second electrically conductive layer.
    Type: Grant
    Filed: March 28, 2022
    Date of Patent: October 31, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Xuerang Hu, Weiming Ren, Xuedong Liu, Zhong-wei Chen
  • Patent number: 11784024
    Abstract: A multi-cell detector may include a first layer having a region of a first conductivity type and a second layer including a plurality of regions of a second conductivity type. The second layer may also include one or more regions of the first conductivity type. The plurality of regions of the second conductivity type may be partitioned from one another, preferably by the one or more regions of the first conductivity type of the second layer. The plurality of regions of the second conductivity type may be spaced apart from one or more regions of the first conductivity type in the second layer. The detector may further include an intrinsic layer between the first and second layers.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: October 10, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Joe Wang, Yongxin Wang, Zhongwei Chen, Xuerang Hu
  • Publication number: 20230317402
    Abstract: Disclosed herein is an electron-optical assembly for an electron-optical column for projecting a charged particle beam along a beam path towards a target, the electron-optical assembly comprising: electromagnetic shielding surrounding the charged particle beam path and configured to shield the charged particle beam from an electromagnetic field external to the electromagnetic shielding; wherein the electromagnetic shielding comprises a plurality of sections extending along different positions along the beam path, each section surrounding the charged particle beam, wherein the sections are separable.
    Type: Application
    Filed: March 7, 2023
    Publication date: October 5, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Derk Ferdinand WALVOORT, Dmitry MUDRETSOV, Xuerang HU, Qingpo XI, Jurgen VAN SOEST, Marco Jan-Jaco WIELAND
  • Publication number: 20230280293
    Abstract: An improved charged particle beam inspection apparatus, and more particularly, a particle beam inspection apparatus including an improved alignment mechanism is disclosed. An improved charged particle beam inspection apparatus may include a second electron detection device to generate one or more images of one or more beam spots of the plurality of secondary electron beams during the alignment mode. The beam spot image may be used to determine the alignment characteristics of one or more of the plurality of secondary electron beams and adjust a configuration of a secondary electron projection system.
    Type: Application
    Filed: February 17, 2023
    Publication date: September 7, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Xuerang HU, Xinan LUO, Qingpo XI, Xuedong LIU, Weiming REN
  • Publication number: 20230282441
    Abstract: A multi-beam apparatus for observing a sample with high resolution and high throughput is proposed. In the apparatus, a source-conversion unit forms plural and parallel images of one single electron source by deflecting plural beamlets of a parallel primary-electron beam therefrom, and one objective lens focuses the plural deflected beamlets onto a sample surface and forms plural probe spots thereon. A movable condenser lens is used to collimate the primary-electron beam and vary the currents of the plural probe spots, a pre-beamlet-forming means weakens the Coulomb effect of the primary-electron beam, and the source-conversion unit minimizes the sizes of the plural probe spots by minimizing and compensating the off-axis aberrations of the objective lens and condenser lens.
    Type: Application
    Filed: January 23, 2023
    Publication date: September 7, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Weiming REN, Xuedong LIU, Xuerang HU, Zhongwei CHEN
  • Patent number: 11721521
    Abstract: The present disclosure proposes a crossover-forming deflector array of an electro-optical system for directing a plurality of electron beams onto an electron detection device. The crossover-forming deflector array includes a plurality of crossover-forming deflectors positioned at or at least near an image plane of a set of one or more electro-optical lenses of the electro-optical system, wherein each crossover-forming deflector is aligned with a corresponding electron beam of the plurality of electron beams.
    Type: Grant
    Filed: March 17, 2022
    Date of Patent: August 8, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Weiming Ren, Xuedong Liu, Xuerang Hu, Zhong-wei Chen
  • Patent number: 11705304
    Abstract: A multi-beam apparatus for observing a sample with high resolution and high throughput and in flexibly varying observing conditions is proposed. The apparatus uses a movable collimating lens to flexibly vary the currents of the plural probe spots without influencing the intervals thereof, a new source-conversion unit to form the plural images of the single electron source and compensate off-axis aberrations of the plural probe spots with respect to observing conditions, and a pre-beamlet-forming means to reduce the strong Coulomb effect due to the primary-electron beam.
    Type: Grant
    Filed: July 12, 2021
    Date of Patent: July 18, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Shuai Li, Weiming Ren, Xuedong Liu, Juying Dou, Xuerang Hu, Zhongwei Chen
  • Patent number: 11676793
    Abstract: An electromagnetic compound lens may be configured to focus a charged particle beam. The compound lens may include an electrostatic lens provided on a secondary optical axis and a magnetic lens also provided on the secondary optical axis. The magnetic lens may include a permanent magnet. A charged particle optical system may include a beam separator configured to separate a plurality of beamlets of a primary charged particle beam generated by a source along a primary optical axis from secondary beams of secondary charged particles. The system may include a secondary imaging system configured to focus the secondary beams onto a detector along the secondary optical axis. The secondary imaging system may include the compound lens.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: June 13, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Weiming Ren, Xuedong Liu, Xuerang Hu, Zhong-wei Chen
  • Patent number: 11676792
    Abstract: Disclosed herein is an apparatus comprising: a source of charged particles configured to emit a beam of charged particles along a primary beam axis of the apparatus; a condenser lens configured to cause the beam to concentrate around the primary beam axis; an aperture; a first multi-pole lens; a second multi-pole lens; wherein the first multi-pole lens is downstream with respect to the condenser lens and upstream with respect to the second multi-pole lens; wherein the second multi-pole lens is downstream with respect to the first multi-pole lens and upstream with respect to the aperture.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: June 13, 2023
    Assignee: ASML Netherlands, B.V
    Inventors: Xuedong Liu, Qingpo Xi, Youfei Jiang, Weiming Ren, Xuerang Hu, Zhongwei Chen
  • Patent number: 11670477
    Abstract: A multi-beam apparatus for multi-beam inspection with an improved source conversion unit providing more beamlets with high electric safety, mechanical availability and mechanical stabilization has been disclosed. The source-conversion unit comprises an image-forming element array having a plurality of image-forming elements, an aberration compensator array having a plurality of micro-compensators, and a pre-bending element array with a plurality of pre-bending micro-deflectors. In each of the arrays, adjacent elements are placed in different layers, and one element may comprise two or more sub-elements placed in different layers. The sub-elements of a micro-compensator may have different functions such as micro-lens and micro-stigmators.
    Type: Grant
    Filed: October 2, 2018
    Date of Patent: June 6, 2023
    Assignee: ASML Netherlands B.V.
    Inventors: Xuerang Hu, Xuedong Liu, Weiming Ren, Zhong-wei Chen
  • Publication number: 20230107989
    Abstract: Disclosed herein is a module for supporting a device configured to manipulate charged particle paths in a charged particle apparatus, the module comprising: a support arrangement configured to support the device, wherein the device is configured to manipulate a charged particle path within the charged particle apparatus; and a support positioning system configured to move the support arrangement within the module; wherein the module is arranged to be field replaceable in the charged particle apparatus.
    Type: Application
    Filed: December 9, 2022
    Publication date: April 6, 2023
    Applicant: ASML Netherlands B.V.
    Inventors: Christiaan OTTEN, Peter-Paul CRANS, Marc SMITS, Laura DEL TIN, Christan TEUNISSEN, Yang-Shan HUANG, Stijn Wilem Herman Karel STEENBRINK, Xuerang HU, Qingpo XI, Xinan LUO, Xuedong LIU
  • Patent number: RE49784
    Abstract: A new multi-beam apparatus with a total FOV variable in size, orientation and incident angle, is proposed. The new apparatus provides more flexibility to speed the sample observation and enable more samples observable. More specifically, as a yield management tool to inspect and/or review defects on wafers/masks in semiconductor manufacturing industry, the new apparatus provide more possibilities to achieve a high throughput and detect more kinds of defects.
    Type: Grant
    Filed: August 27, 2020
    Date of Patent: January 2, 2024
    Assignee: ASML Netherlands B.V.
    Inventors: Weiming Ren, Xuedong Liu, Xuerang Hu, Zhong-wei Chen