Patents by Inventor Lequn Liu

Lequn Liu 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: 10996426
    Abstract: A 3D imaging system comprises a phase detection autofocus (PDAF) image sensor, a lens for imaging a cross-section of a 3D object on the PDAF image sensor and an actuator for driving the lens for focusing each cross-section of the 3D object on the PDAF image sensor. The actuator drives the lens until the PDAF image sensor identifies an image of a first cross-section of the 3D object in-focus and records the image of the first cross-section. The PDAF image sensor records images of subsequent cross-sections of the 3D object formed by the lens driven by the actuator on the PDAF image sensor. The recorded images of each cross-section of the 3D object are stacked to form a 3D image of the 3D object.
    Type: Grant
    Filed: August 21, 2019
    Date of Patent: May 4, 2021
    Assignee: OmniVision Technologies, Inc.
    Inventors: Anson Chan, Lequn Liu, Suganda Jutamulia
  • Publication number: 20210121934
    Abstract: A device and method for forming a hollow wallboard, in particular, for continuously forming a wood/bamboo molded hollow wallboard with embedded reinforcing ribs, feature a simple process, with high production efficiency, and continuous production at low production cost. The method for continuously forming a wood/bamboo molded hollow wallboard with embedded reinforcing ribs includes: 1) driving a punch in a molding cavity by an actuating mechanism to move up and down in a straight line along vertical guide rails, so that the punch moves relative to a plurality of inner molding tubes and a plurality of reinforcing ribs which are vertically provided in the molding cavity and are in a movable fit with the punch; and allowing a heating mechanism to heat both an inner wall of the molding cavity and a wall of the inner molding tubes.
    Type: Application
    Filed: September 24, 2020
    Publication date: April 29, 2021
    Applicant: Zhejiang Academy of Forestry
    Inventors: Lequn Liu, Fangcheng Liu
  • Publication number: 20210055502
    Abstract: A 3D imaging system comprises a phase detection autofocus (PDAF) image sensor, a lens for imaging a cross-section of a 3D object on the PDAF image sensor and an actuator for driving the lens for focusing each cross-section of the 3D object on the PDAF image sensor. The actuator drives the lens until the PDAF image sensor identifies an image of a first cross-section of the 3D object in-focus and records the image of the first cross-section. The PDAF image sensor records images of subsequent cross-sections of the 3D object formed by the lens driven by the actuator on the PDAF image sensor. The recorded images of each cross-section of the 3D object are stacked to form a 3D image of the 3D object.
    Type: Application
    Filed: August 21, 2019
    Publication date: February 25, 2021
    Applicant: OmniVision Technologies, Inc.
    Inventors: Anson Chan, Lequn Liu, Suganda Jutamulia
  • Publication number: 20210035982
    Abstract: Methods of forming a DRAM bit line to improve line edge roughness (LER) and lower resistance are described. The method comprises implanting an inert species into a bit line metal layer having a first grain size on a substrate to form an amorphized bit line metal layer having a second grain size smaller than the first grain size. A film stack is then deposited on the amorphized bit line metal layer. The film stack and amorphized bit line metal layer are etched to form a patterned film stack on the substrate. The patterned film stack on the substrate is thermally annealed.
    Type: Application
    Filed: July 27, 2020
    Publication date: February 4, 2021
    Applicant: Applied Materials, Inc.
    Inventors: Lequn Liu, Priyadarshi Panda, Jonathan C. Shaw
  • Publication number: 20200312953
    Abstract: Methods of forming and processing semiconductor devices are described. Certain embodiments relate to the formation of self-aligned DRAM capacitors. More particularly, certain embodiments relate to the formation of self-aligned DRAM capacitors utilizing the formation of self-aligned growth pillars. The pillars lead to greater capacitor heights, increase critical dimension uniformity, and self-aligned bottom and top contacts.
    Type: Application
    Filed: March 23, 2020
    Publication date: October 1, 2020
    Applicant: Micromaterials LLC
    Inventors: Uday Mitra, Regina Freed, Ho-yung David Hwang, Sanjay Natarajan, Lequn Liu
  • Publication number: 20200251151
    Abstract: Memory devices are described. The memory devices include a plurality of bit lines extending through a stack of alternating memory layers and dielectric layers. Each of the memory layers comprises a single crystalline-like silicon layer and includes a first word line, a second word line, a first capacitor, and a second capacitor. Methods of forming stacked memory devices are also described.
    Type: Application
    Filed: February 3, 2020
    Publication date: August 6, 2020
    Applicant: Applied Materials, Inc.
    Inventors: Chang Seok Kang, Tomohiko Kitajima, Gill Yong Lee, Sanjay Natarajan, Sung-Kwan Kang, Lequn Liu
  • Patent number: 10566364
    Abstract: A resonant-filter image sensor includes a pixel array including a plurality of pixels and a microresonator layer above the pixel array. The microresonator layer includes a plurality of microresonators formed of a first material with an extinction coefficient less than 0.02 at a free-space wavelength of five hundred nanometers. Each of the plurality of pixels may have at least one of the plurality of microresonators at least partially thereabove. The resonant-filter image sensor may further include a layer covering the microresonator layer that has a second refractive index less than a first refractive index, the first refractive index being the refractive index of the first material. Each microresonator may be one of a parallelepiped, a cylinder, a spheroid, and a sphere.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: February 18, 2020
    Assignee: OmniVision Technologies, Inc.
    Inventors: Yuanwei Zheng, Gang Chen, Duli Mao, Dyson H. Tai, Lequn Liu
  • Publication number: 20190346604
    Abstract: An eye wear comprises an optical filter disposed in front of an eye. The optical filter has a transmittance function of wavelength comprising a transmittance peak having a peak transmittance and a transmittance bandwidth. A transmittance outside the transmittance peak is at a lower level transmittance, wherein a ratio of the lower level transmittance to the peak transmittance is less than unity. The transmittance peak is at a central wavelength of a laser that emits laser light forming one of a laser spot and a laser line. The transmittance bandwidth is larger than a bandwidth of the laser light emitted by the laser. The laser spot or the laser line formed by the laser light emitted by the laser is viewed through the eye wear.
    Type: Application
    Filed: May 4, 2019
    Publication date: November 14, 2019
    Inventors: Suganda Jutamulia, Lequn Liu
  • Publication number: 20190324306
    Abstract: A display system comprises a first display for providing a first value and a second display for providing a second value. The displayed image is a product of multiplication of the first value provided by the first display and the second value provided by the second display. The first display is a transmissive display comprises: a first glass substrate, an unpatterned ITO layer, a LC layer, a patterned ITO layer having isolated electrodes, and a second glass substrate. The second display is a reflective LCOS comprises: a glass substrate, an unpatterned ITO layer, a LC layer, a metal electrode layer, and a silicon substrate.
    Type: Application
    Filed: April 23, 2018
    Publication date: October 24, 2019
    Applicant: OmniVision Technologies, Inc.
    Inventors: Suganda Jutamulia, Lequn Liu, Kenny Geng, Guannho Tsau
  • Patent number: 10437120
    Abstract: A display system comprises a first display for providing a first value and a second display for providing a second value. The displayed image is a product of multiplication of the first value provided by the first display and the second value provided by the second display. The first display is a transmissive display comprises: a first glass substrate, an unpatterned ITO layer, a LC layer, a patterned ITO layer having isolated electrodes, and a second glass substrate. The second display is a reflective LCOS comprises: a glass substrate, an unpatterned ITO layer, a LC layer, a metal electrode layer, and a silicon substrate.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: October 8, 2019
    Assignee: OmniVision Technologies, Inc.
    Inventors: Suganda Jutamulia, Lequn Liu, Kenny Geng, Guannho Tsau
  • Publication number: 20190302881
    Abstract: A display system includes a display positioned to show images to a user, and a sensor positioned to monitor a gaze location of an eye of the user. A controller is coupled to the display and the sensor, and the controller includes logic that causes the display system to perform operations. For example, the controller may receive the gaze location information from the sensor, and determine the gaze location of the eye. First resolution image data is output to the display for a first region in the images. Second resolution image data is output to the display for a second region in the images. And third resolution image data is output to the display for a third region in the images.
    Type: Application
    Filed: March 29, 2018
    Publication date: October 3, 2019
    Inventors: Anson Chan, Lequn Liu
  • Publication number: 20190181173
    Abstract: A resonant-filter image sensor includes a pixel array including a plurality of pixels and a microresonator layer above the pixel array. The microresonator layer includes a plurality of microresonators formed of a first material with an extinction coefficient less than 0.02 at a free-space wavelength of five hundred nanometers. Each of the plurality of pixels may have at least one of the plurality of microresonators at least partially thereabove. The resonant-filter image sensor may further include a layer covering the microresonator layer that has a second refractive index less than a first refractive index, the first refractive index being the refractive index of the first material. Each microresonator may be one of a parallelepiped, a cylinder, a spheroid, and a sphere.
    Type: Application
    Filed: February 14, 2019
    Publication date: June 13, 2019
    Inventors: Yuanwei Zheng, Gang Chen, Duli Mao, Dyson H. Tai, Lequn Liu
  • Patent number: 10317733
    Abstract: An alignment layer for a liquid crystal on silicon (LCOS) display includes a nano-particle layer. In a particular embodiment the nano-particle layer includes a lower nano-layer and an upper nano-layer, each formed onto oxide layers of the LCOS display. In a more particular embodiment, the lower nano-layer and the upper nano-layer are offset printed onto the oxide layers.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: June 11, 2019
    Assignee: OmniVision Technologies, Inc.
    Inventors: Ming Zhang, Yin Qian, Libo Weng, Oray Orkun Cellek, Dyson Hsin-Chih Tai, Lequn Liu, Dominic Massetti
  • Patent number: 10290670
    Abstract: A resonant-filter image sensor includes a pixel array including a plurality of pixels and a microresonator layer above the pixel array. The microresonator layer includes a plurality of microresonators formed of a first material with an extinction coefficient less than 0.02 at a free-space wavelength of five hundred nanometers. Each of the plurality of pixels may have at least one of the plurality of microresonators at least partially thereabove. The resonant-filter image sensor may further include a layer covering the microresonator layer that has a second refractive index less than a first refractive index, the first refractive index being the refractive index of the first material. Each microresonator may be one of a parallelepiped, a cylinder, a spheroid, and a sphere.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: May 14, 2019
    Assignee: OmniVision Technologies, Inc.
    Inventors: Yuanwei Zheng, Gang Chen, Duli Mao, Dyson H. Tai, Lequn Liu
  • Publication number: 20180113336
    Abstract: An alignment layer for a liquid crystal on silicon (LCOS) display includes a nano-particle layer. In a particular embodiment the nano-particle layer includes a lower nano-layer and an upper nano-layer, each formed onto oxide layers of the LCOS display. In a more particular embodiment, the lower nano-layer and the upper nano-layer are offset printed onto the oxide layers.
    Type: Application
    Filed: October 26, 2016
    Publication date: April 26, 2018
    Applicant: OmniVision Technologies, Inc.
    Inventors: Ming Zhang, Yin Qian, Libo Weng, Oray Orkun Cellek, Dyson Hsin-Chih Tai, Lequn Liu, Dominic Massetti
  • Publication number: 20170373109
    Abstract: A resonant-filter image sensor includes a pixel array including a plurality of pixels and a microresonator layer above the pixel array. The microresonator layer includes a plurality of microresonators formed of a first material with an extinction coefficient less than 0.02 at a free-space wavelength of five hundred nanometers. Each of the plurality of pixels may have at least one of the plurality of microresonators at least partially thereabove. The resonant-filter image sensor may further include a layer covering the microresonator layer that has a second refractive index less than a first refractive index, the first refractive index being the refractive index of the first material. Each microresonator may be one of a parallelepiped, a cylinder, a spheroid, and a sphere.
    Type: Application
    Filed: June 28, 2016
    Publication date: December 28, 2017
    Inventors: Yuanwei Zheng, Gang Chen, Duli Mao, Dyson H. Tai, Lequn Liu
  • Publication number: 20170287966
    Abstract: A method of image sensor fabrication includes providing a plurality of photodiodes disposed in a semiconductor material and a floating diffusion disposed in the semiconductor material. The method also includes providing peripheral circuitry disposed in the semiconductor material, including a first electrical contact to the semiconductor material, and forming a transfer gate disposed to transfer image charge from the photodiode to the floating diffusion. An isolation layer is deposited on a surface of the semiconductor material, and contact holes are etched in the isolation layer. A first silicide layer disposed on the floating diffusion, a second silicide layer disposed on the transfer gate, and a third silicide layer disposed on the first electrical contact to the semiconductor material are formed in the contact holes by depositing a silicon layer in the contact holes and metalizing the silicon layer.
    Type: Application
    Filed: June 15, 2017
    Publication date: October 5, 2017
    Inventor: Lequn Liu
  • Publication number: 20170207269
    Abstract: An image sensor includes a photodiode disposed in semiconductor material. The photodiode is one of a plurality of photodiodes formed in an array. The image sensor also includes a floating diffusion disposed in the semiconductor material, and the floating diffusion is disposed adjacent to the photodiode in the plurality of photodiodes. A transfer gate is disposed to transfer image charge generated in the individual photodiode into the floating diffusion. Peripheral circuitry is disposed in the semiconductor material and includes a first electrical contact to the semiconductor material. A first silicide layer is disposed on the floating diffusion, a second silicide layer is disposed on the transfer gate, and a third silicide layer is disposed on the first electrical contact to the semiconductor material.
    Type: Application
    Filed: January 14, 2016
    Publication date: July 20, 2017
    Inventor: Lequn Liu
  • Patent number: 9401285
    Abstract: Systems and methods for chemical mechanical planarization topography control via implants are disclosed. In one embodiment, a method of manufacturing a semiconductor device includes increasing the content of at least one of silicon or germanium in at least select regions of a dielectric material thereby reducing the material removal rate for a chemical mechanical polishing (CMP) process at the select regions, and removing material from the dielectric material using the CMP process. In another embodiment, a method of manufacturing a semiconductor device includes increasing content of at least one of boron, phosphorus, or hydrogen in at least select regions of a dielectric material thereby increasing the material removal rate of a CMP process at the select regions, and removing material from the dielectric material using the CMP process.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: July 26, 2016
    Assignee: Micron Technology, Inc.
    Inventors: Andrew Carswell, Tony M. Lindenberg, Mark Morley, Kyle Ritter, Lequn Liu
  • Publication number: 20160172208
    Abstract: Systems and methods for chemical mechanical planarization topography control via implants are disclosed. In one embodiment, a method of manufacturing a semiconductor device includes increasing the content of at least one of silicon or germanium in at least select regions of a dielectric material thereby reducing the material removal rate for a chemical mechanical polishing (CMP) process at the select regions, and removing material from the dielectric material using the CMP process. In another embodiment, a method of manufacturing a semiconductor device includes increasing content of at least one of boron, phosphorus, or hydrogen in at least select regions of a dielectric material thereby increasing the material removal rate of a CMP process at the select regions, and removing material from the dielectric material using the CMP process.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 16, 2016
    Inventors: Andrew Carswell, Tony M. Lindenberg, Mark Morley, Kyle Ritter, Lequn Liu