Patents by Inventor Roelof Willem HERFST

Roelof Willem HERFST 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).

  • Patent number: 11709181
    Abstract: The present disclosure concerns probe cassette 1 for holding a probe 60 in storage to provide automated transfer of the probe to a probe mount of a scanning probe microscope. The probe cassette comprising a first vacuum chamber C1 with a volume V1, and a second vacuum chamber C2 with a volume V2, and a first and second vacuum channel 10, respectively fluidly connecting the first and second vacuum chamber to an outlet 30 fluidly connectable to an external vacuum, such that upon application of the external vacuum a mounting position of the probe relative to the cassette and a mounting position of the cassette relative to the sample stage is maintained. The probe cassette arranged to allow breaking a vacuum condition in the second chamber maintaining the mounting position of the probe before breaking a vacuum condition in the first chamber maintaining a mounting position of the probe cassette.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: July 25, 2023
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Roelof Willem Herfst, Lukas Kramer, Anton Adriaan Bijnagte
  • Patent number: 11698389
    Abstract: This document relates to a probe for use in a scanning probe microscopy device. The probe comprises a cantilever and a probe tip being located at a first end section of the cantilever. The cantilever is configured for bending in a Z-direction perpendicular to a surface of a substrate in use. The cantilever comprises a neck section and a paddle section, and the probe tip is located on the paddle section. The neck section has a width and height in cross section thereof, comprises a base part having a rectangular cross section. The cantilever at least across a length of the neck section comprises a ridge extending in a direction away from the base part. The base part and the ridge together define the width and height of the neck section, and have dimensions such that a vertical bending stiffness of the cantilever for bending in the Z-direction matches a lateral stiffness of the cantilever with respect to forces acting on the probe tip in a direction transverse to the Z-direction.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: July 11, 2023
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Roelof Willem Herfst, Albert Dekker, Anton Adriaan Bijnagte, Jan Jacobus Benjamin Biemond
  • Publication number: 20230160924
    Abstract: This document relates to a probe for use in a scanning probe microscopy device. The probe comprises a cantilever and a probe tip being located at a first end section of the cantilever. The cantilever is configured for bending in a Z-direction perpendicular to a surface of a substrate in use. The cantilever comprises a neck section and a paddle section, and the probe tip is located on the paddle section. The neck section has a width and height in cross section thereof, comprises a base part having a rectangular cross section. The cantilever at least across a length of the neck section comprises a ridge extending in a direction away from the base part. The base part and the ridge together define the width and height of the neck section, and have dimensions such that a vertical bending stiffness of the cantilever for bending in the Z-direction matches a lateral stiffness of the cantilever with respect to forces acting on the probe tip in a direction transverse to the Z-direction.
    Type: Application
    Filed: October 31, 2018
    Publication date: May 25, 2023
    Inventors: Roelof Willem HERFST, Albert DEKKER, Anton Adriaan BIJNAGTE, Jan Jacobus Benjamin BIEMOND
  • Patent number: 11592460
    Abstract: The present invention relates to a scan head for a scanning probe microscope arranged for moving a probe including a conductive cantilever relatively to a substrate surface, the head comprising: a first electrode positioned such that a capacitor is formed across a gap between the first electrode and a second electrode, wherein the second electrode is formed by the conductive cantilever; a voltage source for actuating the conductive cantilever by applying a voltage to the capacitor; and at least a first resistor arranged in series between the voltage source and one of the first and second electrodes such as to form an RC circuit for damping a vibration of the cantilever.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: February 28, 2023
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Roelof Willem Herfst, Hamed Sadeghian Marnani
  • Publication number: 20220390486
    Abstract: The present disclosure concerns probe cassette 1 for holding a probe 60 in storage to provide automated transfer of the probe to a probe mount of a scanning probe microscope. The probe cassette comprising a first vacuum chamber C1 with a volume V1, and a second vacuum chamber C2 with a volume V2, and a first and second vacuum channel 10, respectively fluidly connecting the first and second vacuum chamber to an outlet 30 fluidly connectable to an external vacuum, such that upon application of the external vacuum a mounting position of the probe relative to the cassette and a mounting position of the cassette relative to the sample stage is maintained. The probe cassette arranged to allow breaking a vacuum condition in the second chamber maintaining the mounting position of the probe before breaking a vacuum condition in the first chamber maintaining a mounting position of the probe cassette.
    Type: Application
    Filed: November 6, 2020
    Publication date: December 8, 2022
    Inventors: Roelof Willem HERFST, Lukas KRAMER, Anton Adriaan BIJNAGTE
  • Patent number: 11320457
    Abstract: The invention is directed at a method of performing scanning probe microscopy on a substrate surface using a scanning probe microscopy system. A probe tip and substrate surface are moved relative to each other in one or more directions parallel to the scanning plane to position the probe tip to a scanning position on the substrate surface with the probe tip; a displacement is measured by an encoder of said probe tip in said one or more directions; and a fiducial pattern is provided fixed relative to the substrate surface, said fiducial pattern having a scannable structure that is scannable by said probe tip and said structure forming a grid of fiducial marks in said one or more dimensions; said grid dimensioned to allow for measuring placement deviations of the probe tip relative to the probe head by identifying one or more fiducial marks in the fiducial pattern.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: May 3, 2022
    Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
    Inventors: Roelof Willem Herfst, Anton Adriaan Bijnagte, Jan Jacobus Benjamin Biemond, Klara Maturova
  • Publication number: 20220057430
    Abstract: The present invention relates to a scan head for a scanning probe microscope arranged for moving a probe including a conductive cantilever relatively to a substrate surface, the head comprising: a first electrode positioned such that a capacitor is formed across a gap between the first electrode and a second electrode, wherein the second electrode is formed by the conductive cantilever; a voltage source for actuating the conductive cantilever by applying a voltage to the capacitor; and at least a first resistor arranged in series between the voltage source and one of the first and second electrodes such as to form an RC circuit for damping a vibration of the cantilever.
    Type: Application
    Filed: December 3, 2019
    Publication date: February 24, 2022
    Inventors: Roelof Willem HERFST, Hamed SADEGHIAN MARNANI
  • Publication number: 20210318353
    Abstract: The invention is directed at a method of performing scanning probe microscopy on a substrate surface using a scanning probe microscopy system. A probe tip and substrate surface are moved relative to each other in one or more directions parallel to the scanning plane to position the probe tip to a scanning position on the substrate surface with the probe tip; a displacement is measured by an encoder of said probe tip in said one or more directions; and a fiducial pattern is provided fixed relative to the substrate surface, said fiducial pattern having a scannable structure that is scannable by said probe tip and said structure forming a grid of fiducial marks in said one or more dimensions; said grid dimensioned to allow for measuring placement deviations of the probe tip relative to the probe head by identifying one or more fiducial marks in the fiducial pattern.
    Type: Application
    Filed: July 24, 2019
    Publication date: October 14, 2021
    Inventors: Roelof Willem HERFST, Anton Adriaan BIJNAGTE, Jan Jacobus Benjamin BIEMOND, Klara MATUROVA
  • Publication number: 20210278436
    Abstract: The present document relates to a probe chip for use in a scanning probe microscopy device for holding a probe mounted thereon. The probe chip includes a carrier element having a probe bearing side which is configured for bearing the probe to be extending therefrom as an integral or mounted part thereof. The carrier element further comprises a mounting side configured for mounting the probe chip onto a scan head of the scanning probe microscopy device, wherein the mounting side extends in a longitudinal and lateral direction of the carrier element to be substantially flat.
    Type: Application
    Filed: July 5, 2019
    Publication date: September 9, 2021
    Inventors: Roelof Willem HERFST, Anton Adriaan BIJNAGTE, Albert DEKKER, Jan Jacobus Benjamin BIEMOND