Patents by Inventor Fethi Dhaoui

Fethi Dhaoui 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).

  • Publication number: 20220262434
    Abstract: A ReRAM memory array includes ReRAM memory cells and a select circuit having two series-connected select transistors connected in series with a ReRAM device. When ReRAM memory cell(s) are selected for erasing, the bit line coupled to the ReRAM memory cell(s) to be erased is biased at a first voltage potential. The source line coupled to the ReRAM memory cell(s) to be erased is biased at a second voltage potential greater than the first voltage potential, the difference between the first voltage potential and the second voltage potential being sufficient to erase the ReRAM device. The gates of the series-connected select transistors coupled to the ReRAM memory cell(s) to be erased are supplied with positive voltage pulses. The gates of the series-connected select transistors coupled to the ReRAM memory cell(s) unselected for erasing are supplied with a voltage potential insufficient to turn them on.
    Type: Application
    Filed: May 4, 2022
    Publication date: August 18, 2022
    Applicant: Microchip Technology Inc.
    Inventors: Victor Nguyen, Fethi Dhaoui, John L. McCollum, Fengliang Xue
  • Patent number: 11355187
    Abstract: A method for erasing a ReRAM memory cell that includes a ReRAM device having a select circuit with two series-connected select transistors. The method includes determining if the ReRAM cell is selected for erasing. If the ReRAM cell is selected for erasing, the bit line node is biased at a first voltage potential, the source line node is biased at a second voltage potential greater than the first voltage potential and the gates of the series-connected select transistors are supplied with positive voltage pulses. The difference between the first voltage potential and the second voltage potential is sufficient to erase the ReRAM device in the ReRAM cell. If the ReRAM cell is unselected for erasing, the gate of the one of the series-connected select transistors having its drain connected to an electrode of the ReRAM device is supplied with a voltage potential insufficient to turn it on.
    Type: Grant
    Filed: January 2, 2021
    Date of Patent: June 7, 2022
    Assignee: Microchip Technology Inc.
    Inventors: Victor Nguyen, Fethi Dhaoui, John L McCollum, Fengliang Xue
  • Patent number: 11114348
    Abstract: An integrated circuit includes a plurality of low-voltage FinFET transistors each having a channel length l and a channel width w, the low-voltage FinFET transistors having a first threshold voltage channel implant and a first gate dielectric thickness. The integrated circuit also includes a plurality of high-voltage FinFET transistors each having the channel length l and the channel width w, the high-voltage FinFET transistors having a second threshold voltage channel implant greater than the first threshold voltage channel implant and second gate dielectric thickness greater than the first gate dielectric thickness.
    Type: Grant
    Filed: November 1, 2018
    Date of Patent: September 7, 2021
    Assignee: Microsemi SoC Corp.
    Inventors: John McCollum, Fethi Dhaoui, Pavan Singaraju
  • Patent number: 11031078
    Abstract: A single-event-upset (SEU) stabilized memory cell includes a latch portion including a cross-coupled latch, and at least one cross coupling circuit path in the latch portion including a first series-connected pair of vertical resistors.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: June 8, 2021
    Assignee: Microsemi SoC Corp.
    Inventors: Fengliang Xue, Fethi Dhaoui, Pavan Singaraju, Victor Nguyen, John L. McCollum, Volker Hecht
  • Publication number: 20210125666
    Abstract: A ReRAM memory cell includes a ReRAM device including a solid electrolyte layer disposed between a first ion-source electrode and a second electrode and a select circuit including two series-connected select transistors connected in series with the ReRAM device, each of the two series-connected select transistors having a gate connected to a separate control line.
    Type: Application
    Filed: January 2, 2021
    Publication date: April 29, 2021
    Applicant: Microchip Technology Inc.
    Inventors: Victor Nguyen, Fethi Dhaoui, John L McCollum, Fengliang Xue
  • Patent number: 10910050
    Abstract: A ReRAM memory cell includes a ReRAM device including a solid electrolyte layer disposed between a first ion-source electrode and a second electrode and a select circuit including two series-connected select transistors connected in series with the ReRAM device, each of the two series-connected select transistors having a gate connected to a separate control line.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: February 2, 2021
    Assignee: Microchip Technology Inc.
    Inventors: Victor Nguyen, Fethi Dhaoui, John L. McCollum, Fengliang Xue
  • Patent number: 10872661
    Abstract: A method for programming a resistive random-access memory (ReRAM) cell includes passing a first current through the ReRAM device for a first period of time, the first current selected to create a leakage path through the ReRAM device, and after passing the first current through the ReRAM device passing a second current through the ReRAM device for a second period of time shorter than the first period of time, the second current selected to create a current path having a desired resistance through the leakage path through the ReRAM device.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: December 22, 2020
    Assignee: Microchip Technology Inc.
    Inventors: Fengliang Xue, Fethi Dhaoui, Victor Nguyen, John L. McCollum
  • Publication number: 20200327937
    Abstract: A ReRAM memory cell includes a ReRAM device including a solid electrolyte layer disposed between a first ion-source electrode and a second electrode and a select circuit including two series-connected select transistors connected in series with the ReRAM device, each of the two series-connected select transistors having a gate connected to a separate control line.
    Type: Application
    Filed: May 7, 2019
    Publication date: October 15, 2020
    Applicant: Microchip Technology Inc.
    Inventors: Victor Nguyen, Fethi Dhaoui, John L. McCollum, Fengliang Xue
  • Publication number: 20200327938
    Abstract: A method for programming a resistive random-access memory (ReRAM) cell includes passing a first current through the ReRAM device for a first period of time, the first current selected to create a leakage path through the ReRAM device, and after passing the first current through the ReRAM device passing a second current through the ReRAM device for a second period of time shorter than the first period of time, the second current selected to create a current path having a desired resistance through the leakage path through the ReRAM device.
    Type: Application
    Filed: May 7, 2019
    Publication date: October 15, 2020
    Applicant: Microchip Technology Inc.
    Inventors: Fengliang Xue, Fethi Dhaoui, Victor Nguyen, John L. McCollum
  • Publication number: 20200286559
    Abstract: A single-event-upset (SEU) stabilized memory cell includes a latch portion including a cross-coupled latch, and at least one cross coupling circuit path in the latch portion including a first series-connected pair of vertical resistors.
    Type: Application
    Filed: March 25, 2019
    Publication date: September 10, 2020
    Applicant: Microsemi SoC Corp.
    Inventors: Fengliang Xue, Fethi Dhaoui, Pavan Singaraju, Victor Nguyen, John L. McCollum, Volker Hecht
  • Publication number: 20190172756
    Abstract: An integrated circuit includes a plurality of low-voltage FinFET transistors each having a channel length l and a channel width w, the low-voltage FinFET transistors having a first threshold voltage channel implant and a first gate dielectric thickness. The integrated circuit also includes a plurality of high-voltage FinFET transistors each having the channel length l and the channel width w, the high-voltage FinFET transistors having a second threshold voltage channel implant greater than the first threshold voltage channel implant and second gate dielectric thickness greater than the first gate dielectric thickness.
    Type: Application
    Filed: November 1, 2018
    Publication date: June 6, 2019
    Applicant: Microsemi SoC Corp.
    Inventors: John McCollum, Fethi Dhaoui, Pavan Singaraju
  • Patent number: 9859289
    Abstract: A non-volatile memory cell includes a p-channel non-volatile transistor having a source and a drain defining a channel and a gate overlying the channel and an n-channel non-volatile transistor having a source and a drain defining a channel and a gate overlying the channel. In at least one of the p-channel non-volatile transistor and the n-channel non-volatile transistor, a lightly-doped drain region extends from the drain into the channel.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: January 2, 2018
    Inventors: Fethi Dhaoui, John McCollum
  • Patent number: 9755072
    Abstract: A method for fabricating a high-voltage transistor on a semiconductor substrate includes defining and forming shallow trench isolation regions for all of the transistors, defining and forming well regions for all of the transistors, forming a gate oxide layer in the well regions for all of the transistor, forming gates for all of the transistors over the gate oxide layer, implanting a dopant to form lightly-doped drain regions for all of the transistors, the lightly-doped drain regions for at least drains of the high-voltage transistors being spaced apart from an inner edge of the shallow trench isolation regions, forming gate spacers at sides of the gates of all of the transistors, and implanting a dopant to form sources and drains for all of the transistors, the drains of the high-voltage transistors being formed completely surrounded by the lightly-doped drain regions of the high-voltage transistors.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: September 5, 2017
    Assignee: MICROSEMI SoC CORPORATION
    Inventors: Fengliang Xue, Fethi Dhaoui, John L. McCollum
  • Patent number: 9754948
    Abstract: A non-volatile programmable memory cell suitable for use in a programmable logic array includes a non-volatile MOS transistor of a first conductivity type in series with a volatile MOS transistor of a second conductivity type. The non-volatile MOS transistor may be a floating gate transistor, such as a flash transistor, or may be another type of non-volatile transistor such as a floating charge-trapping SONOS, MONOS transistor, or a nano-crystal transistor. A volatile MOS transistor, an inverter, or a buffer may be driven by coupling its gate or input to the common connection between the non-volatile MOS transistor and the volatile MOS transistor.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: September 5, 2017
    Assignee: MICROSEMI SoC CORPORATION
    Inventors: Fethi Dhaoui, John McCollum, Frank Hawley, Leslie Richard Wilkinson
  • Publication number: 20170179382
    Abstract: A resistive random access memory device is formed in an integrated circuit between a first metal layer and a second metal layer and includes a first barrier layer disposed over the first metal layer, a tunneling dielectric layer disposed over the first barrier layer, a solid electrolyte layer disposed over the tunneling dielectric layer, an ion source layer disposed over the solid electrolyte layer, and a second barrier layer disposed over the ion source layer.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 22, 2017
    Applicant: Microsemi SoC Corporation
    Inventors: John L. McCollum, Fethi Dhaoui, Frank W. Hawley
  • Patent number: 9520448
    Abstract: A push-pull resistive random access memory cell circuit includes an output node, a word line, a first bit line, and a second bit line. A first resistive random access memory device is connected between the first bit line and the output node and a second resistive random access memory device is connected between the output node and the second bit line. A first programming transistor has a gate connected to the word line, a drain connected to the output node, and a source. A second programming transistor has a gate connected to the word line, a drain connected to the source of the first programming transistor, and a source. The first and second programming transistors have the same pitch, the same channel length, and the same gate dielectric thickness, the gate dielectric thickness chosen to withstand programming and erase potentials encountered during operation of the push-pull ReRAM cell circuit.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: December 13, 2016
    Assignee: Microsemi SoC Corporation
    Inventors: John L. McCollum, Fethi Dhaoui
  • Publication number: 20160351626
    Abstract: A push-pull resistive random access memory cell circuit includes an output node, a word line, a first bit line, and a second bit line. A first resistive random access memory device is connected between the first bit line and the output node and a second resistive random access memory device is connected between the output node and the second bit line. A first programming transistor has a gate connected to the word line, a drain connected to the output node, and a source. A second programming transistor has a gate connected to the word line, a drain connected to the source of the first programming transistor, and a source. The first and second programming transistors have the same pitch, the same channel length, and the same gate dielectric thickness, the gate dielectric thickness chosen to withstand programming and erase potentials encountered during operation of the push-pull ReRAM cell circuit.
    Type: Application
    Filed: August 10, 2016
    Publication date: December 1, 2016
    Applicant: Microsemi SoC Corporation
    Inventors: John L. McCollum, Fethi Dhaoui
  • Publication number: 20160269031
    Abstract: A push-pull resistive random access memory cell circuit includes an output node, a word line, a first bit line, and a second bit line. A first resistive random access memory device is connected between the first bit line and the output node and a second resistive random access memory device is connected between the output node and the second bit line. A first programming transistor has a gate connected to the word line, a drain connected to the output node, and a source. A second programming transistor has a gate connected to the word line, a drain connected to the source of the first programming transistor, and a source. The first and second programming transistors have the same pitch, the same channel length, and the same gate dielectric thickness, the gate dielectric thickness chosen to withstand programming and erase potentials encountered during operation of the push-pull ReRAM cell circuit.
    Type: Application
    Filed: January 29, 2016
    Publication date: September 15, 2016
    Applicant: Microsemi SoC Corporation
    Inventors: John L. McCollum, Fethi Dhaoui
  • Patent number: 9444464
    Abstract: A push-pull resistive random access memory cell circuit includes an output node, a word line, a first bit line, and a second bit line. A first resistive random access memory device is connected between the first bit line and the output node and a second resistive random access memory device is connected between the output node and the second bit line. A first programming transistor has a gate connected to the word line, a drain connected to the output node, and a source. A second programming transistor has a gate connected to the word line, a drain connected to the source of the first programming transistor, and a source. The first and second programming transistors have the same pitch, the same channel length, and the same gate dielectric thickness, the gate dielectric thickness chosen to withstand programming and erase potentials encountered during operation of the push-pull ReRAM cell circuit.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: September 13, 2016
    Assignee: Microsemi SoC Corporation
    Inventors: John L. McCollum, Fethi Dhaoui
  • Publication number: 20160204223
    Abstract: A method for fabricating a high-voltage transistor on a semiconductor substrate includes defining and forming shallow trench isolation regions for all of the transistors, defining and forming well regions for all of the transistors, forming a gate oxide layer in the well regions for all of the transistor, forming gates for all of the transistors over the gate oxide layer, implanting a dopant to form lightly-doped drain regions for all of the transistors, the lightly-doped drain regions for at least drains of the high-voltage transistors being spaced apart from an inner edge of the shallow trench isolation regions, forming gate spacers at sides of the gates of all of the transistors, and implanting a dopant to form sources and drains for all of the transistors, the drains of the high-voltage transistors being formed completely surrounded by the lightly-doped drain regions of the high-voltage transistors.
    Type: Application
    Filed: March 21, 2016
    Publication date: July 14, 2016
    Applicant: Microsemi SoC Corporation
    Inventors: Fengliang Xue, Fethi Dhaoui, John L. McCollum