Patents by Inventor Alessio Spessot

Alessio Spessot 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: 20170170289
    Abstract: The disclosed technology generally relates to semiconductor devices, and more particularly to transistor devices such as metal-oxide-semiconductor (MOS) transistor devices. In one aspect, a transistor device comprises a channel region in a substrate partially delimited by a source and a drain junction at a main surface of the substrate. A first dielectric layer stack is arranged on the channel region, such that an orthogonal projection of the first dielectric layer stack on the main surface defining a first area is between and does not overlap the junctions and. A second dielectric layer stack is formed laterally adjacent to and in contact with the first dielectric layer stack, such that an orthogonal projection of the second dielectric layer stack overlaps the junction and defines a second area. A metal gate layer is formed on the first and second dielectric layer stacks, where an orthogonal projection of the metal gate layer on the main surface overlaps the first area and the second area.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 15, 2017
    Inventors: Alessio Spessot, An De Keersgieter, Naoto Horiguchi
  • Patent number: 9613695
    Abstract: Memory cells, devices and methods are disclosed, including those that involve applying a waveform to a resistive memory cell to program the memory cell to an over-reset state representing a logic value.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: April 4, 2017
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Patent number: 9531371
    Abstract: A method for at least partially compensating for a change in threshold voltage level of a FET transistor induced by OFF-state stress degradation includes determining a signal indicative of a change in threshold voltage level of the FET with respect to a reference threshold voltage level, and applying a restoration signal to the FET. This restoration signal is adapted for shifting the threshold voltage level of the FET in a direction having opposite sign with respect to the change in threshold voltage level. Applying the restoration signal further includes taking into account the signal indicative of the change in threshold voltage level.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: December 27, 2016
    Assignee: IMEC VZW
    Inventors: Alessio Spessot, Moon Ju Cho
  • Publication number: 20160172030
    Abstract: Embodiments disclosed herein may relate to adjusting an aspect of a programming pulse for one or more memory cells, such as based at least in part on one or more detected programmed resistance values for the one or more memory cells.
    Type: Application
    Filed: November 13, 2015
    Publication date: June 16, 2016
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Patent number: 9245759
    Abstract: A method of manufacturing a dual work function semiconductor device is disclosed. In one aspect, the method includes providing a substrate having first and second areas for forming first and second transistor types. The method additionally includes forming a dielectric layer on the substrate, which extends to cover at least parts of the first and second areas. The method additionally includes forming a first metal layer/stack on the dielectric layer in the first area, where the first metal layer/stack comprises a first work function-shifting element. The method additionally includes forming a second metal layer/stack on the first metal layer in the first area and on the dielectric layer in the second area, where the second metal layer/stack comprises a second work function-shifting element.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: January 26, 2016
    Assignee: IMEC
    Inventors: Tom Schram, Christian Caillat, Alessio Spessot, Pierre Fazan, Lars-Ake Ragnarsson, Romain Ritzenthaler
  • Patent number: 9218876
    Abstract: Embodiments disclosed herein may relate to adjusting an aspect of a programming pulse for one or more memory cells, such as based at least in part on one or more detected programmed resistance values for the one or more memory cells.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: December 22, 2015
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Publication number: 20150357038
    Abstract: Memory cells, devices and methods are disclosed, including those that involve applying a waveform to a resistive memory cell to program the memory cell to an over-reset state representing a logic value.
    Type: Application
    Filed: August 14, 2015
    Publication date: December 10, 2015
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Patent number: 9117519
    Abstract: Memory cells, devices and methods are disclosed, including those that involve applying a waveform to a resistive memory cell to program the memory cell to an over-reset state representing a logic value.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: August 25, 2015
    Assignee: MICRON TECHNOLOGY, INC.
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Patent number: 9076726
    Abstract: A method for tuning the effective work function of a gate structure in a semiconductor device is described. The semiconductor device is part of an integrated circuit and the gate structure has a metal layer and a high-k dielectric layer separating the metal layer from an active layer of the semiconductor device. The method includes providing an interconnect structure of the integrated circuit on top of the gate structure, the interconnect structure comprising a layer stack comprising at least a pre-metal dielectric layer comprising a metal filled connecting via connected to the gate structure through the pre-metal dielectric layer, and the interconnect structure having an upper exposed metal portion; and, thereafter, exposing at least a portion of the upper exposed metal portion to a plasma under predetermined exposure conditions, to tune the effective work function of the gate structure.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: July 7, 2015
    Assignee: IMEC
    Inventors: Thomas Kauerauf, Alessio Spessot, Christian Caillat
  • Publication number: 20150171857
    Abstract: A method for at least partially compensating for a change in threshold voltage level of a FET transistor induced by OFF-state stress degradation includes determining a signal indicative of a change in threshold voltage level of the FET with respect to a reference threshold voltage level, and applying a restoration signal to the FET. This restoration signal is adapted for shifting the threshold voltage level of the FET in a direction having opposite sign with respect to the change in threshold voltage level. Applying the restoration signal further includes taking into account the signal indicative of the change in threshold voltage level.
    Type: Application
    Filed: December 15, 2014
    Publication date: June 18, 2015
    Applicant: IMEC VZW
    Inventors: Alessio Spessot, Moon Ju Cho
  • Publication number: 20140187039
    Abstract: A method for tuning the effective work function of a gate structure in a semiconductor device is described. The semiconductor device is part of an integrated circuit and the gate structure has a metal layer and a high-k dielectric layer separating the metal layer from an active layer of the semiconductor device. The method includes providing an interconnect structure of the integrated circuit on top of the gate structure, the interconnect structure comprising a layer stack comprising at least a pre-metal dielectric layer comprising a metal filled connecting via connected to the gate structure through the pre-metal dielectric layer, and the interconnect structure having an upper exposed metal portion; and, thereafter, exposing at least a portion of the upper exposed metal portion to a plasma under predetermined exposure conditions, to tune the effective work function of the gate structure.
    Type: Application
    Filed: December 18, 2013
    Publication date: July 3, 2014
    Applicant: IMEC
    Inventors: Thomas Kauerauf, Alessio Spessot, Christian Caillat
  • Patent number: 8726409
    Abstract: A method for operating a scanning probe microscope at elevated scan frequencies has a characterization stage of sweeping a plurality of excitation frequencies of the vertical displacement of the scanning element; measuring the value attained by the reading parameter at the excitation frequencies; and identifying plateau regions of the response spectrum of the reading parameter. The reading parameter variation is limited within a predetermined range over a predefined frequency interval, thereby defining corresponding fast scanning frequency windows in which the microscope assembly is sufficiently stable to yield a lateral resolution comparable to the one obtained during slow measurements. The measurement stage includes driving the scanning element along at least a scanning trajectory over the surface of the specimen at a frequency selected among the frequencies included in a fast scanning frequency window.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: May 13, 2014
    Assignee: Consiglio Nazionale Delle Ricerche
    Inventors: Friedrich Esch, Carlo Dri, Giovanni Comelli, Cristina Africh, Alessio Spessot
  • Publication number: 20140106556
    Abstract: A method of manufacturing a dual work function semiconductor device is disclosed. In one aspect, the method includes providing a substrate having first and second areas for forming first and second transistor types. The method additionally includes forming a dielectric layer on the substrate, which extends to cover at least parts of the first and second areas. The method additionally includes forming a first metal layer/stack on the dielectric layer in the first area, where the first metal layer/stack comprises a first work function-shifting element. The method additionally includes forming a second metal layer/stack on the first metal layer in the first area and on the dielectric layer in the second area, where the second metal layer/stack comprises a second work function-shifting element.
    Type: Application
    Filed: October 7, 2013
    Publication date: April 17, 2014
    Applicant: IMEC
    Inventors: Tom Schram, Christian Caillat, Alessio Spessot, Pierre Fazan, Lars-Ake Ragnarsson, Romain Ritzenthaler
  • Publication number: 20140063899
    Abstract: Memory cells, devices and methods are disclosed, including those that involve applying a waveform to a resistive memory cell to program the memory cell to an over-reset state representing a logic value.
    Type: Application
    Filed: August 29, 2012
    Publication date: March 6, 2014
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Publication number: 20130301334
    Abstract: Embodiments disclosed herein may relate to adjusting an aspect of a programming pulse for one or more memory cells, such as based at least in part on one or more detected programmed resistance values for the one or more memory cells.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 14, 2013
    Applicant: Micron Technology, Inc.
    Inventors: Alessio Spessot, Paolo Fantini, Massimo Ferro
  • Patent number: 8441861
    Abstract: Apparatus and methods determine a program verify (PV) induced reading parameter distribution. A measured post-PV reading parameter distribution can be compared with an expected post-PV reading parameter distribution. For example, de-convolution can be applied to identify the PV induced reading parameter distribution. Based on the PV-induced reading parameter distribution, adjustments can be made to one or more parameters of the PV process.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: May 14, 2013
    Assignee: Micron Technology, Inc.
    Inventors: Alessio Spessot, Paolo Fantini
  • Publication number: 20120236653
    Abstract: Subject matter disclosed herein relates to a memory device, and more particularly to write or erase performance of a memory device.
    Type: Application
    Filed: March 16, 2011
    Publication date: September 20, 2012
    Applicant: Micron Technology, Inc.
    Inventors: Alessio Spessot, Paolo Fantini
  • Publication number: 20120066799
    Abstract: A method for operating a scanning probe microscope at elevated scan frequencies has a characterization stage of sweeping a plurality of excitation frequencies of the vertical displacement of the scanning element; measuring the value attained by the reading parameter at the excitation frequencies; and identifying plateau regions of the response spectrum of the reading parameter. The reading parameter variation is limited within a predetermined range over a predefined frequency interval, thereby defining corresponding fast scanning frequency windows in which the microscope assembly is sufficiently stable to yield a lateral resolution comparable to the one obtained during slow measurements. The measurement stage includes driving the scanning element along at least a scanning trajectory over the surface of the specimen at a frequency selected among the frequencies included in a fast scanning frequency window.
    Type: Application
    Filed: September 12, 2011
    Publication date: March 15, 2012
    Applicant: Consiglio Nazionale Delle Ricerche
    Inventors: Friedrich Esch, Carlo Dri, Giovanni Comelli, Cristina Africh, Alessio Spessot