Patents by Inventor Yiwu Ding
Yiwu Ding 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).
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Publication number: 20240044799Abstract: Methods and systems for determining information for a specimen are provided. Certain embodiments relate to detecting photoluminescence for applications such as inspection and/or metrology of electro-optically active devices or advanced packaging devices. One embodiment of a system includes an illumination subsystem configured for directing light having one or more illumination wavelengths to a specimen and a detection subsystem configured for detecting photoluminescence from the specimen. The system also includes a computer subsystem configured for determining information for the specimen from output generated by the detection subsystem responsive to the detected photoluminescence.Type: ApplicationFiled: July 25, 2023Publication date: February 8, 2024Inventors: James Xu, David W. Shortt, Yiwu Ding
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Patent number: 10473454Abstract: A height mapping system includes a controller configured to generate a height map of a region of interest of a sample with a first optical metrology system having a first numerical aperture, receive images of features having known three-dimensional shapes at selected image plane locations from a second optical metrology system having a second numerical aperture larger than the first numerical aperture, calculate distances between the imaging plane locations and peaks of the features based on in-focus portions of the images and the known three-dimensional shapes, determine distances between the imaging plane locations and a surface of the sample for the features based on the height map, and determine heights of the features by combining the distances between the imaging plane locations and peaks of the features with the distances between the imaging plane locations and the surface of the sample for the one or more features.Type: GrantFiled: January 4, 2018Date of Patent: November 12, 2019Assignee: KLA-Tencor CorporationInventor: Yiwu Ding
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Patent number: 10402963Abstract: Defect detection on transparent or translucent wafers can be performed on a die using references from the same die. A first calculated value based on a kernel size, such as a moving mean, is determined. A first difference is determined by subtracting the first calculated value from a pixel intensity. Candidate pixels with a first difference above a threshold are classified. A second calculated value based on a kernel size, such as a local median, is determined. A second difference is determined by subtracting the second calculated value from the pixel intensity. Pixels that include a defect are classified when the second difference is above the threshold.Type: GrantFiled: November 3, 2017Date of Patent: September 3, 2019Assignee: KLA-Tencor CorporationInventors: Xuguang Jiang, Yong Zhang, Yiwu Ding
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Publication number: 20190066284Abstract: Defect detection on transparent or translucent wafers can be performed on a die using references from the same die. A first calculated value based on a kernel size, such as a moving mean, is determined. A first difference is determined by subtracting the first calculated value from a pixel intensity. Candidate pixels with a first difference above a threshold are classified. A second calculated value based on a kernel size, such as a local median, is determined. A second difference is determined by subtracting the second calculated value from the pixel intensity. Pixels that include a defect are classified when the second difference is above the threshold.Type: ApplicationFiled: November 3, 2017Publication date: February 28, 2019Inventors: Xuguang Jiang, Yong Zhang, Yiwu Ding
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Patent number: 9489557Abstract: A decodable indicia reading terminal can comprise a housing including a housing window, a multiple pixel image sensor disposed within the housing, an imaging lens configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: GrantFiled: December 28, 2015Date of Patent: November 8, 2016Assignee: Hand Held Products, Inc.Inventors: Yiwu Ding, Chen Feng, Ynjiun Paul Wang
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Publication number: 20160110578Abstract: A decodable indicia reading terminal can comprise a housing including a housing window, a multiple pixel image sensor disposed within the housing, an imaging lens configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: ApplicationFiled: December 28, 2015Publication date: April 21, 2016Inventors: Yiwu Ding, Chen Feng, Ynjiun Paul Wang
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Patent number: 9292722Abstract: There is set forth herein an indicia reading apparatus having a configuration in which an illumination assembly for projecting an illumination pattern is de-energized during subsequent exposure periods. In one embodiment the indicia reading apparatus includes a configuration in which the illumination assembly is energized intermediate of the exposure periods. The indicia reading apparatus is useful for reading decodable indicia that is displayed on a display.Type: GrantFiled: January 13, 2014Date of Patent: March 22, 2016Assignee: Honeywell International, Inc.Inventor: Yiwu Ding
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Patent number: 9224025Abstract: A decodable indicia reading terminal can comprise a housing including a housing window, a multiple pixel image sensor disposed within the housing, an imaging lens configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: GrantFiled: January 21, 2014Date of Patent: December 29, 2015Assignee: Hand Held Products, Inc.Inventors: Yiwu Ding, Chen Feng, Ynjiun Paul Wang
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Publication number: 20140131445Abstract: A decodable indicia reading terminal can comprise a housing including a housing window, a multiple pixel image sensor disposed within the housing, an imaging lens configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: ApplicationFiled: January 21, 2014Publication date: May 15, 2014Applicant: Hand Held Products, Inc.Inventors: Yiwu Ding, Chen Feng, Ynjiun Paul Wang
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Publication number: 20140124579Abstract: There is set forth herein an indicia reading apparatus having a configuration in which an illumination assembly for projecting an illumination pattern is de-energized during subsequent exposure periods. In one embodiment the indicia reading apparatus includes a configuration in which the illumination assembly is energized intermediate of the exposure periods. The indicia reading apparatus is useful for reading decodable indicia that is displayed on a display.Type: ApplicationFiled: January 13, 2014Publication date: May 8, 2014Applicant: Honeywell International, Inc. d.b.a. Honeywell Scanning and MobilityInventor: Yiwu Ding
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Patent number: 8718415Abstract: Optical devices with versatile spectral attributes are provided that are implemented with one or more modulated and homogeneous layers to realize leaky-mode resonance operation and corresponding versatile spectral-band design. The first and/or higher multiple evanescent diffraction orders are applied to excite one or more leaky modes. The one- or two-dimensional periodic structure, fashioned by proper distribution of materials within each period, can have a resulting symmetric or asymmetric profile to permit a broadened variety of resonant leaky-mode devices to be realized. Thus, the attributes of the optical device permit, among other things, adjacent, distinct resonance frequencies or wavelengths to be produced, convenient shaping of the reflection and transmission spectra for such optical device to be accomplished, and the wavelength resonance locations to be precisely controlled so as to affect the extent to which the leaky modes interact with each other.Type: GrantFiled: October 9, 2009Date of Patent: May 6, 2014Assignee: University of ConnecticutInventors: Robert Magnusson, Yiwu Ding
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Patent number: 8640960Abstract: Methods for using an optical indicia reading terminal including a housing, a multiple pixel image sensor disposed within the housing, an imaging lens assembly configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: GrantFiled: December 1, 2011Date of Patent: February 4, 2014Assignee: Honeywell International Inc.Inventors: Ynjiun Paul Wang, Yiwu Ding, Chen Feng
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Patent number: 8636215Abstract: A decodable indicia reading terminal can comprise a housing including a housing window, a multiple pixel image sensor disposed within the housing, an imaging lens configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: GrantFiled: June 27, 2011Date of Patent: January 28, 2014Assignee: Hand Held Products, Inc.Inventors: Yiwu Ding, Chen Feng, Ynjiun Paul Wang
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Patent number: 8628013Abstract: There is set forth herein an indicia reading apparatus having a configuration in which an illumination assembly for projecting an illumination pattern is de-energized during subsequent exposure periods. In one embodiment the indicia reading apparatus includes a configuration in which the illumination assembly is energized intermediate of the exposure periods. The indicia reading apparatus is useful for reading decodable indicia that is displayed on a display.Type: GrantFiled: December 13, 2011Date of Patent: January 14, 2014Assignee: Honeywell International Inc.Inventor: Yiwu Ding
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Publication number: 20130146666Abstract: There is set forth herein an indicia reading apparatus having a configuration in which an illumination assembly for projecting an illumination pattern is de-energized during subsequent exposure periods. In one embodiment the indicia reading apparatus includes a configuration in which the illumination assembly is energized intermediate of the exposure periods. The indicia reading apparatus is useful for reading decodable indicia that is displayed on a display.Type: ApplicationFiled: December 13, 2011Publication date: June 13, 2013Applicant: Honeywell International Inc. doing business as (d.b.a) Honeywell Scanning and MobilityInventor: Yiwu Ding
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Publication number: 20130130939Abstract: A guided mode resonance (GMR) sensor that can be used to simultaneously detect an array of analytes. It provides a diagnostic system that can rapidly detect an array of biomarker proteins in patient samples (such as blood, serum or plasma for example) which can be used as an accurate means to conduct a differential analysis of proteins that allows the discrimination of early and late stages of disease, such as metastatic versus primary ovarian serous carcinomas. The GMR sensor can be provided in a compact size such that it can be portable.Type: ApplicationFiled: May 11, 2012Publication date: May 23, 2013Inventors: Debra Wawro, Shelby Zimmerman, Yiwu Ding, Robert Magnusson, Peter Koulen
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Publication number: 20120325912Abstract: Methods for using an optical indicia reading terminal including a housing, a multiple pixel image sensor disposed within the housing, an imaging lens assembly configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: ApplicationFiled: December 1, 2011Publication date: December 27, 2012Applicant: Honeywell International Inc. doing business as (d.b.a) Honeywell Scanning and MobilityInventors: Ynjiun Paul Wang, Yiwu Ding, Chen Feng
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Publication number: 20120325911Abstract: A decodable indicia reading terminal can comprise a housing including a housing window, a multiple pixel image sensor disposed within the housing, an imaging lens configured to focus an image of decodable indicia on the image sensor, an optical bandpass filter disposed in an optical path of light incident on the image sensor, an analog-to-digital (A/D) converter configured to convert an analog signal read out of the image sensor into a digital signal representative of the analog signal, and processor configured to output a decoded message data corresponding to the decodable indicia by processing the digital signal.Type: ApplicationFiled: June 27, 2011Publication date: December 27, 2012Inventors: Yiwu Ding, Chen Feng, Ynjiun Paul Wang
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Publication number: 20100092124Abstract: Optical devices with versatile spectral attributes are provided that are implemented with one or more modulated and homogeneous layers to realize leaky-mode resonance operation and corresponding versatile spectral-band design. The first and/or higher multiple evanescent diffraction orders are applied to excite one or more leaky modes. The one- or two-dimensional periodic structure, fashioned by proper distribution of materials within each period, can have a resulting symmetric or asymmetric profile to permit a broadened variety of resonant leaky-mode devices to be realized. Thus, the attributes of the optical device permit, among other things, adjacent, distinct resonance frequencies or wavelengths to be produced, convenient shaping of the reflection and transmission spectra for such optical device to be accomplished, and the wavelength resonance locations to be precisely controlled so as to affect the extent to which the leaky modes interact with each other.Type: ApplicationFiled: October 9, 2009Publication date: April 15, 2010Applicant: UNIVERSITY OF CONNECTICUTInventors: Robert Magnusson, Yiwu Ding
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Patent number: 7689086Abstract: Optical devices with versatile spectral attributes are provided that are implemented with one or more modulated and homogeneous layers to realize leaky-mode resonance operation and corresponding versatile spectral-band design. The first and/or higher multiple evanescent diffraction orders are applied to excite one or more leaky modes. The one- or two-dimensional periodic structure, fashioned by proper distribution of materials within each period, can have a resulting symmetric or asymmetric profile to permit a broadened variety of resonant leaky-mode devices to be realized. Thus, the attributes of the optical device permit, among other things, adjacent, distinct resonance frequencies or wavelengths to be produced, convenient shaping of the reflection and transmission spectra for such optical device to be accomplished, and the wavelength resonance locations to be precisely controlled so as to affect the extent to which the leaky modes interact with each other.Type: GrantFiled: July 25, 2005Date of Patent: March 30, 2010Assignee: University of ConnecticutInventors: Robert Magnusson, Yiwu Ding