Patents Assigned to Nova Ltd.
  • Publication number: 20220044975
    Abstract: Controlling an etch process applied to a multi-layered structure, by calculating a spectral derivative of reflectance of an illuminated region of interest of a multi-layered structure during an etch process applied to the multi-layered structure, identifying in the spectral derivative a discontinuity that indicates that an edge of a void formed by the etch process at the region of interest has crossed a layer boundary of the multi-layered structure, determining that the crossed layer boundary corresponds to a preselected layer boundary of the multi-layered structure, and applying a predefined control action to the etch process responsive to determining that the crossed layer boundary corresponds to the preselected layer boundary of the multi-layered structure.
    Type: Application
    Filed: August 23, 2021
    Publication date: February 10, 2022
    Applicant: NOVA LTD.
    Inventors: Gil Loewenthal, Shay Yogev, Yoav Etzioni
  • Patent number: 11150190
    Abstract: A method and system are presented for use in measuring characteristic(s) of patterned structures. The method utilizes processing of first and second measured data, wherein the first measured data is indicative of at least one Raman spectrum obtained from a patterned structure under measurements using at least one selected optical measurement scheme each with a predetermined configuration of illuminating and/or collected light conditions corresponding to the characteristic(s) to be measured, and the second measured data comprises at least one spectrum obtained from the patterned structure in Optical Critical Dimension (OCD) measurement session. The processing comprises applying model-based analysis to the at least one Raman spectrum and the at least one OCD spectrum, and determining the characteristic(s) of the patterned structure under measurements.
    Type: Grant
    Filed: August 3, 2020
    Date of Patent: October 19, 2021
    Assignee: NOVA LTD
    Inventors: Gilad Barak, Yanir Hainick, Yonatan Oren
  • Patent number: 11107738
    Abstract: Controlling an etch process applied to a multi-layered structure, by calculating a spectral derivative of reflectance of an illuminated region of interest of a multi-layered structure during an etch process applied to the multi-layered structure, identifying in the spectral derivative a discontinuity that indicates that an edge of a void formed by the etch process at the region of interest has crossed a layer boundary of the multi-layered structure, determining that the crossed layer boundary corresponds to a preselected layer boundary of the multi-layered structure, and applying a predefined control action to the etch process responsive to determining that the crossed layer boundary corresponds to the preselected layer boundary of the multi -layered structure.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: August 31, 2021
    Assignee: Nova Ltd.
    Inventors: Gil Loewenthal, Shay Yogev, Yoav Etzioni
  • Patent number: 8215958
    Abstract: The invention is a dental irrigator for delivering irrigant solution from an irrigation solution reservoir to the site of a dental procedure. The irrigator comprises: a hollow dental tool modified by the addition of one or more curved blades either formed directly on the neck of the tool or on a sleeve attached coaxially to the neck, one or more inlets associated with each of the curved blades, a housing that provides a watertight volume surrounding the inlets while allowing the tool to be freely moved with respect to the housing, and a supply hose, which conducts the irrigant solution at relatively low pressure from the reservoir to the housing. When the dental tool is attached to the distal end of a dental hand-piece and the hand-piece is activated causing the tool to move, irrigation solution enters the hollow interior of the neck of the tool and, as a result of the forces created by the motion of the curved blades, is delivered at relatively high pressure to the site.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: July 10, 2012
    Assignee: Redent-Nova Ltd.
    Inventor: Refael Hof
  • Patent number: 8172572
    Abstract: A dental tool displacement apparatus for use with a motorized power handle to displace a dental tool includes a tool holder having a receptacle for receiving the dental tool, and a drive arrangement. The drive arrangement defines a transmission from the motorized power handle to the tool holder such that the tool holder undergoes reciprocating motion parallel to the tool axis at a first frequency of oscillations per minute and rotates about the tool axis at a second frequency of rotations per minute. In some cases, the two types of motion are generated by an eccentric drive pin engaging an annular slot which has gear teeth along one side, thereby generating an angular rotation step of the tool holder during each reciprocating stroke. In some cases, the first frequency is at least one order of magnitude greater than the second frequency.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: May 8, 2012
    Assignee: Redent-Nova Ltd.
    Inventor: Raphael Hof
  • Publication number: 20110081623
    Abstract: The invention is an instrument for cleaning and/or shaping and/or widening a channel that exists in or through a solid object. The design of the instrument the superelastic and shape memory properties of the material from which it is made, allow the inner volume enclosed by the instrument, its outer contour, or both to change as a result of the forces exerted upon it while working, thereby shaping the instrument to the three-dimensional contour of the channel. A preferred embodiment of the instrument is an endodontic file for use in the cleaning, shaping, and widening stages of a root canal procedure.
    Type: Application
    Filed: November 9, 2010
    Publication date: April 7, 2011
    Applicant: Redent-Nova Ltd.
    Inventors: Rephael HOF, Ehud Teperovich, Amir Meir Zilbershtain
  • Publication number: 20100330528
    Abstract: A dental tool displacement apparatus for use with a motorized power handle to displace a dental tool includes a tool holder having a receptacle for receiving the dental tool, and a drive arrangement. The drive arrangement defines a transmission from the motorized power handle to the tool holder such that the tool holder undergoes reciprocating motion parallel to the tool axis at a first frequency of oscillations per minute and rotates about the tool axis at a second frequency of rotations per minute. In some cases, the two types of motion are generated by an eccentric drive pin engaging an annular slot which has gear teeth along one side, thereby generating an angular rotation step of the tool holder during each reciprocating stroke. In some cases, the first frequency is at least one order of magnitude greater than the second frequency.
    Type: Application
    Filed: August 24, 2009
    Publication date: December 30, 2010
    Applicant: ReDent-Nova Ltd.
    Inventor: Raphael Hof
  • Patent number: 7833017
    Abstract: The invention is an instrument for cleaning and/or shaping and/or widening a channel that exists in or through a solid object. The design of the instrument the superelastic and shape memory properties of the material from which it is made, allow the inner volume enclosed by the instrument, its outer contour, or both to change as a result of the forces exerted upon it while working, thereby shaping the instrument to the three-dimensional contour of the channel. A preferred embodiment of the instrument is an endodontic file for use in the cleaning, shaping, and widening stages of a root canal procedure.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: November 16, 2010
    Assignee: Redent-Nova Ltd.
    Inventors: Rephael Hof, Ehud Teperovich, Amir Meir Zilbershtain
  • Patent number: 7713059
    Abstract: The invention is an instrument for cleaning and/or shaping and/or widening a channel that exists in or through a solid object. The design of the instrument the superelastic and shape memory properties of the material from which it is made, allow the inner volume enclosed by the instrument, its outer contour, or both to change as a result of the forces exerted upon it while working, thereby shaping the instrument to the three-dimensional contour of the channel. A preferred embodiment of the instrument is an endodontic file for use in the cleaning, shaping, and widening stages of a root canal procedure.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: May 11, 2010
    Assignee: Redent-Nova Ltd.
    Inventors: Rephael Hof, Ehud Teperovich, Amir Meir Zilbershtain
  • Publication number: 20100028830
    Abstract: The invention is a dental irrigator for delivering irrigant solution from an irrigation solution reservoir to the site of a dental procedure. The irrigator comprises: a hollow dental tool modified by the addition of one or more curved blades either formed directly on the neck of the tool or on a sleeve attached coaxially to the neck, one or more inlets associated with each of the curved blades, a housing that provides a watertight volume surrounding the inlets while allowing the tool to be freely moved with respect to the housing, and a supply hose, which conducts the irrigant solution at relatively low pressure from the reservoir to the housing. When the dental tool is attached to the distal end of a dental hand-piece and the hand-piece is activated causing the tool to move, irrigation solution enters the hollow interior of the neck of the tool and, as a result of the forces created by the motion of the curved blades, is delivered at relatively high pressure to the site.
    Type: Application
    Filed: November 21, 2007
    Publication date: February 4, 2010
    Applicant: REDENT-NOVA LTD.
    Inventor: Refael Hof
  • Publication number: 20090176189
    Abstract: The present invention is an extraction system capable of easily removing an object having a hollow interior from an enclosed space. The system comprises an overtube that is at least partially insertable into the enclosed space, and a wire comprising an elongated portion, a handle and an insertion end comprising one or more catching members. The catching member is in a straight configuration when the insertion end is confined within the overtube and assumes an open configuration when the insertion end is situated out of the overtube. Initially, the wire is introduced into the enclosed space within the overtube and the wire is pushed out of the overtube such that the catching members will enter the hollow interior of the object. The use of the extraction system is illustrated for the case of extracting a piece of an endodontic file broken during a root canal procedure.
    Type: Application
    Filed: November 13, 2006
    Publication date: July 9, 2009
    Applicant: REDENT-NOVA LTD.
    Inventor: Refael Hof
  • Publication number: 20090130638
    Abstract: The invention is an instrument for cleaning and/or shaping and/or widening a channel that exists in or through a solid object. The design of the instrument the superelastic and shape memory properties of the material from which it is made, allow the inner volume enclosed by the instrument, its outer contour, or both to change as a result of the forces exerted upon it while working, thereby shaping the instrument to the three-dimensional contour of the channel. A preferred embodiment of the instrument is an endodontic file for use in the cleaning, shaping, and widening stages of a root canal procedure.
    Type: Application
    Filed: December 23, 2008
    Publication date: May 21, 2009
    Applicant: REDENT-NOVA LTD.
    Inventors: Rephael Hof, Ehud Teperovich, Amir Meir Zilbershtain