Patents by Inventor David K. Y. Liu

David K. Y. 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: 8988103
    Abstract: An electronic logic circuit uses areal capacitive coupling devices coupled together to process a set of data inputs. Each areal capacitive coupling device can be configured such that a floating gate potential of such device can be altered to at least a first state or a second state in response to receiving an input signal from the set of data inputs, which is coupled electrically to the floating gate. A majority function logic circuit (and other similar circuits) can be interconnected this way using far fewer gates than with a conventional CMOS implementation. Selective logic gates can also be enabled or disabled by configuring them effectively as memory devices.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: March 24, 2015
    Inventor: David K. Y. Liu
  • Publication number: 20150036428
    Abstract: An array of programmable non-volatile devices, such as a nominal OTP cell, is operated such that a Vt representing a particular binary logic state is changed over time. This allows for re-programming and emulating a few times or multi-time programmable device.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 5, 2015
    Inventor: David K.Y. Liu
  • Publication number: 20150036427
    Abstract: An array of programmable non-volatile devices, such as a nominal OTP cell, is adapted such that a Vt representing a particular binary logic state can be changed over time. This allows for re-programming and emulating a few times or multi-time programmable device.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 5, 2015
    Inventor: David K.Y. Liu
  • Patent number: 8705263
    Abstract: A programmable non-volatile configuration circuit uses a pair of non-volatile memory devices arranged in a pull-up and pull-down arrangement. The non-volatile memory devices have floating gates that overlaps a variable portion of a source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. The invention can be used in environments to store configuration data for programmable logic devices, field programmable arrays, and many other applications.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: April 22, 2014
    Assignee: Invensas Corporation
    Inventor: David K. Y. Liu
  • Patent number: 8599612
    Abstract: A programmable non-volatile device is operated with a floating gate that functions as a FET gate that overlaps a portion of a source/drain region and allows for variable coupling through geometry and/or biasing conditions. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. Multi-state embodiments are also possible. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Grant
    Filed: December 4, 2012
    Date of Patent: December 3, 2013
    Assignee: Invensas Corporation
    Inventors: David K. Y. Liu, John Nicholas Gross
  • Patent number: 8582342
    Abstract: A programmable non-volatile configuration circuit uses a pair of non-volatile memory devices arranged in a pull-up and pull-down arrangement. The non-volatile memory devices have floating gates that overlaps a variable portion of a source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. The invention can be used in environments to store configuration data for programmable logic devices, field programmable arrays, and many other applications.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: November 12, 2013
    Assignee: Invensas Corporation
    Inventor: David K. Y. Liu
  • Publication number: 20120287715
    Abstract: A non-volatile memory cell and array structure is disclosed situated within a high voltage region of an integrated circuit. The cell utilizes capacitive coupling based on an overlap between a gate and a drift region to impart a programming voltage. Programming is effectuated using a drain extension which can act to inject hot electrons. The cell can be operated as a one-time programmable (OTP) or multiple-time programmable (MTP) device. The fabrication of the cell relies on processing steps associated with high voltage devices, thus avoiding the need for additional masks, manufacturing steps, etc.
    Type: Application
    Filed: May 10, 2012
    Publication date: November 15, 2012
    Inventor: David K.Y. Liu
  • Patent number: 8305805
    Abstract: An array of programmable non-volatile devices use a floating gate that functions as a FET gate that overlaps a portion of a common source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through capacitive coupling, thus changing the state of the device. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Grant
    Filed: December 2, 2009
    Date of Patent: November 6, 2012
    Assignee: Invensas Corporation
    Inventor: David K. Y. Liu
  • Patent number: 8300470
    Abstract: A programmable two terminal non-volatile device uses a floating gate that can be programed by a hot electron injection induced by a potential between a source and drain. The floating gate layer can also function as a FET gate for other circuits in an integrated circuit containing an array of the devices. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: October 30, 2012
    Assignee: Invensas Corporation
    Inventor: David K.Y. Liu
  • Patent number: 8203861
    Abstract: A programmable non-volatile configuration circuit uses a pair of non-volatile memory devices arranged in a pull-up and pull-down arrangement. The non-volatile memory devices have floating gates that overlaps a variable portion of a source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. The invention can be used in environments to store configuration data for programmable logic devices, field programmable arrays, and many other applications.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: June 19, 2012
    Assignee: Invensas Corporation
    Inventor: David K. Y. Liu
  • Publication number: 20120140564
    Abstract: A programmable non-volatile configuration circuit uses a pair of non-volatile memory devices arranged in a pull-up and pull-down arrangement. The non-volatile memory devices have floating gates that overlaps a variable portion of a source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. The invention can be used in environments to store configuration data for programmable logic devices, field programmable arrays, and many other applications.
    Type: Application
    Filed: January 31, 2012
    Publication date: June 7, 2012
    Applicant: Invensas Corporation
    Inventor: David K.Y. Liu
  • Publication number: 20120062276
    Abstract: An electronic logic circuit uses areal capacitive coupling devices coupled together to process a set of data inputs. Each areal capacitive coupling device can be configured such that a floating gate potential of such device can be altered to at least a first state or a second state in response to receiving an input signal from the set of data inputs, which is coupled electrically to the floating gate. A majority function logic circuit (and other similar circuits) can be interconnected this way using far fewer gates than with a conventional CMOS implementation. Selective logic gates can also be enabled or disabled by configuring them effectively as memory devices.
    Type: Application
    Filed: September 15, 2011
    Publication date: March 15, 2012
    Inventor: David K.Y. Liu
  • Publication number: 20110176365
    Abstract: A programmable two terminal non-volatile device uses a floating gate that can be programmed by a hot electron injection induced by a potential between a source and drain. The floating gate layer can also function as a FET gate for other circuits in an integrated circuit containing an array of the devices. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Application
    Filed: April 4, 2011
    Publication date: July 21, 2011
    Inventor: David K.Y. Liu
  • Publication number: 20110145048
    Abstract: Marketing/advertising presentations are customized for transit passengers, such as commercial airline passengers. The passengers offer a good captive audience during long-duration trips since there is little opportunity for distraction. The passengers' attention and participation can be guaranteed by offering differing levels of incentives (e.g. reduced fare, upgraded seats, product/service discounts, etc.).
    Type: Application
    Filed: December 10, 2010
    Publication date: June 16, 2011
    Inventor: DAVID K.Y. LIU
  • Publication number: 20110116314
    Abstract: A programmable non-volatile device is operated with a floating gate that functions as a FET gate that overlaps a portion of a source/drain region and allows for variable coupling through geometry and/or biasing conditions. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. Multi-state embodiments are also possible. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Application
    Filed: January 21, 2011
    Publication date: May 19, 2011
    Inventors: David K.Y. Liu, John Nicholas Gross
  • Publication number: 20100322001
    Abstract: A multi-programmable non-volatile device is operated with a floating gate that functions as a FET gate that overlaps a portion of a source/drain region and allows for variable coupling through geometry and/or biasing conditions. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. Different source/drain regions can be used for program and read operations. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Application
    Filed: August 26, 2010
    Publication date: December 23, 2010
    Inventors: David K.Y. Liu, John Nicholas Gross
  • Publication number: 20100322010
    Abstract: A programmable non-volatile device is made which uses a floating gate that functions as a FET gate that overlaps a portion of a source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through capacitive coupling, thus changing the state of the device. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Application
    Filed: August 26, 2010
    Publication date: December 23, 2010
    Inventor: David K.Y. Liu
  • Publication number: 20100165698
    Abstract: A programmable non-volatile configuration circuit uses a pair of non-volatile memory devices arranged in a pull-up and pull-down arrangement. The non-volatile memory devices have floating gates that overlaps a variable portion of a source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. The invention can be used in environments to store configuration data for programmable logic devices, field programmable arrays, and many other applications.
    Type: Application
    Filed: December 30, 2009
    Publication date: July 1, 2010
    Inventor: David K.Y. Liu
  • Publication number: 20100109066
    Abstract: An array of programmable non-volatile devices use a floating gate that functions as a FET gate that overlaps a portion of a common source/drain region. This allows a programming voltage for the device to be imparted to the floating gate through capacitive coupling, thus changing the state of the device. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Application
    Filed: December 2, 2009
    Publication date: May 6, 2010
    Inventor: David K.Y. Liu
  • Publication number: 20090124054
    Abstract: A programmable non-volatile device is made with a floating gate that functions as a FET gate that overlaps a portion of a source/drain region and allows for variable coupling through geometry and/or biasing conditions. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. Multi-state embodiments are also possible. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 14, 2009
    Inventors: David K.Y. Liu, John Nicholas Gross