Patents Assigned to Exagan
  • Publication number: 20230408902
    Abstract: The invention concerns a method of manufacturing an assembly of electronic components on a front surface of a semiconductor substrate comprising a plurality of field areas, each field area comprising at least one field and each field comprising at least one electronic component, the method comprising a plurality of photolithography steps to form a stack of layers forming each electronic component, each photolithography step defining a mask level and comprising the application of a mask successively on each field in photolithography equipment, the positioning of said mask on each field being performed relative to a reference mask level, one of the masks being designated as identification mask.
    Type: Application
    Filed: October 18, 2021
    Publication date: December 21, 2023
    Applicant: EXAGAN SAS
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Publication number: 20230378085
    Abstract: The invention concerns a method of manufacturing an assembly of electronic components (3) on the front surface of a semiconductor wafer (1) comprising a plurality of field areas (4), each area (4) comprising at least one field (2) and each field (2) comprising at least one electronic component (3). The method comprises a plurality of photolithography steps to form a stack of layers forming each electronic component (3), each photolithography step comprises the application of a mask successively on each field (2) in photolithography equipment. One of the masks further comprises an identification pattern, said mask being called identification mask. At the photolithography step associated with the identification mask, as least one photolithographic parameter of the photolithography equipment is different for each field area (4), to expose the identification pattern differently in each field area (4).
    Type: Application
    Filed: October 18, 2021
    Publication date: November 23, 2023
    Applicant: EXAGAN SAS
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Publication number: 20230253401
    Abstract: The invention concerns a field-effect transistor (100) having an interdigited structure and comprising: a plurality of elementary transistor cells (50) arranged in parallel, each elementary cell comprising a source electrode (1), a drain electrode (3), and a gate electrode (2) interposed between the source and drain electrodes, a source terminal (10) and a drain terminal (30) respectively connected to the source electrodes (1) and to the drain electrodes (3) of the elementary cells (50), a gate terminal (20) connected to the gate electrodes (2) of the elementary cells. The field-effect transistor (100) only comprises vertical conductive vias to connect the gate electrodes to the gate terminal, and the gate terminal (20) is arranged vertically in line with all or part of the elementary cells (50).
    Type: Application
    Filed: June 15, 2021
    Publication date: August 10, 2023
    Applicant: EXAGAN SAS
    Inventor: Robin JUNG
  • Publication number: 20220359714
    Abstract: The disclosure concerns an electronic device comprising, stacked from a first surface to a second surface, a first stack and a second stack of two high electron mobility transistors, referred to as first and second transistor, the first and the second stack each comprising, from an insulating layer, interposed between the first and the second stack, a barrier layer and a channel layer, the first and the second transistor respectively comprising a first and a second set of electrodes, the first and the second set of electrodes being each provided with a source electrode, with a drain electrode, and with a gate electrode which are arranged so that the first and the second transistor form a half-arm of a bridge.
    Type: Application
    Filed: May 4, 2022
    Publication date: November 10, 2022
    Applicants: Exagan SAS, STMicroelectronics International N.V.
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Publication number: 20220336651
    Abstract: The disclosure concerns a device which comprises a stack of two high electron mobility transistors, referred to as first and second transistor, separated by an insulating layer and each provided with a stack of semiconductor layers respectively referred to as first stack and second stack, the first and the second stack each comprising, from the insulating layer to, respectively, a first and a second surface, a barrier layer and a channel layer, the first and the second transistor respectively comprising a first set of electrodes and a second set of electrodes, the first and the second set of electrodes each comprising a source electrode, a drain electrode, and a gate electrode which are arranged so that the first and the second transistor are electrically connected head-to-tail.
    Type: Application
    Filed: April 1, 2022
    Publication date: October 20, 2022
    Applicants: Exagan SAS, STMicroelectronics International N.V.
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Publication number: 20220328471
    Abstract: The disclosure concerns an electronic device provided with two high electron mobility transistors stacked on each other and having in common their source, drain, and gate electrodes. For example, each of these electrodes extends perpendicularly to the two transistors. For example, the source and drain electrodes electrically contact the conduction channels of each of the transistors so that said channels are electrically connected in parallel.
    Type: Application
    Filed: March 30, 2022
    Publication date: October 13, 2022
    Applicants: Exagan SAS, STMicroelectronics International N.V.
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Publication number: 20220328681
    Abstract: The disclosure concerns an electronic assembly which extends along a stacking direction from a lower surface to an upper surface coupled by an edge surface, the assembly comprises at least two elementary modules stacked along the stacking direction, which each comprise, along the stacking direction and from a back side to a front side, two high electron mobility transistors respectively called back transistor and front transistor, separated by an insulator layer, and having in common a source electrode, a drain electrode, and a gate electrode, the assembly of the front and back transistors being electrically connected in parallel, the electronic assembly comprises, arranged on the front side of each elementary module, a contact layer, electrically contacting the gate electrode of the considered elementary module from its front side, each of the contact layers comprising an electric contact point emerging onto the edge surface.
    Type: Application
    Filed: March 30, 2022
    Publication date: October 13, 2022
    Applicants: Exagan SAS, STMicroelectronics International N.V.
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Publication number: 20220320325
    Abstract: The disclosure concerns an electronic device comprising a HEMT transistor, called main transistor, and at least another HEMT transistor, called additional transistor, stacked on each other. The main transistor and the additional transistor comprise a common drain electrode and, respectively, a main source electrode and an additional source electrode, arranged so that electric conduction paths likely to be formed by the two conduction layers are connected in parallel when one and the other of the HEMT transistors are in the conductive state.
    Type: Application
    Filed: March 25, 2022
    Publication date: October 6, 2022
    Applicants: Exagan SAS, STMicroelectronics International N.V.
    Inventors: Matthieu NONGAILLARD, Thomas OHEIX
  • Patent number: 11114940
    Abstract: A half-bridge electronic device comprises a high level switch and a low level switch in series that are connected at a central point, and a first and a second synchronization system: • the first system comprising a first detection circuit configured to interpret a variation, following a falling edge, of the voltage (Vm) at the central point, and the first system being configured to generate a first synchronization signal (ATON-LS) for activating the low level switch; • the second system comprising a second detection circuit configured to interpret a variation, following a rising edge, of the voltage (Vm) at the central point, and the second system being configured to generate a second synchronization signal (ATON-HS) for activating the high level switch.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: September 7, 2021
    Assignee: Exagan
    Inventors: Laurent Guillot, Thierry Sutto, Alain Bailly
  • Patent number: 11101791
    Abstract: A power circuit switching device comprises two switching terminals, a high-voltage depletion mode transistor and a low-voltage enhancement mode transistor arranged in series between the two switching terminals, a first terminal for receiving a switching signal and electrically connected via a driver circuit to the gate of the high-voltage transistor, and a second terminal for receiving a control signal and electrically connected to the gate of the low-voltage transistor. The device comprises a normally-on protection circuit electrically connected between the second terminal and the gate of the high-voltage transistor to keep the high-voltage transistor in an off-state when the driver circuit is not electrically powered.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: August 24, 2021
    Assignee: Exagan
    Inventors: Laurent Guillot, Thierry Sutto, Eric Moreau
  • Patent number: 11031492
    Abstract: A semiconductor structure comprising III-N materials, includes: a support substrate; a main layer of III-N material, the main layer comprising a first section disposed on the support substrate and a second section disposed on the first section; an inter-layer of III-N material, disposed between the first section and the second section in order to compress the second section of the main layer, wherein the structure's inter-layer consists of a lower layer disposed on the first section and an upper layer disposed on the lower layer and formed by a superlattice.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: June 8, 2021
    Assignee: Exagan
    Inventors: David Schenk, Alexis Bavard
  • Publication number: 20200403508
    Abstract: A half-bridge electronic device comprises a high level switch and a low level switch in series that are connected at a central point, and a first and a second synchronization system: •the first system comprising a first detection circuit configured to interpret a variation, following a falling edge, of the voltage (Vm) at the central point, and the first system 040-being configured to generate a first synchronization signal (ATON-LS) for activating the low level switch; •the second system comprising a second detection circuit configured to interpret a variation, following a rising edge, of the voltage (Vm) at the central point, and the second system being configured to generate a second synchronization signal (ATON-HS) for activating the high level switch.
    Type: Application
    Filed: May 17, 2018
    Publication date: December 24, 2020
    Applicants: Exagan, Exagan
    Inventors: Laurent Guillot, Thierry Sutto, Alain Bailly
  • Patent number: 10777513
    Abstract: An integrated circuit comprises a housing, a plurality of connection pins, a first chip that includes a high-voltage depletion mode transistor, and a second chip that includes a low-voltage enhancement mode transistor. The first chip and second chip each comprise a gate bump contact, a drain bump contact and a source bump contact. The source bump contact of the high-voltage transistor is electrically connected to the drain bump contact of the low-voltage transistor so as to form a central node of the circuit. The circuit includes at least one first Kelvin pin that is electrically connected to the source bump contact of the low-voltage transistor.
    Type: Grant
    Filed: May 26, 2017
    Date of Patent: September 15, 2020
    Assignee: Exagan
    Inventors: Eric Moreau, Thierry Sutto, Laurent Guillot
  • Patent number: 10672746
    Abstract: An integrated circuit includes a first chip including a high-voltage depletion-mode transistor and a second chip including an enhancement-mode device. The chips have first and second gate contact pads, first and second source contact pads and first and second drain contact pads, respectively, on their front sides. Chips are joined together via their front sides, and the area of the first chip is larger than that of the second chip. The first chip includes an additional contact pad on its front side that is electrically insulated from the high-voltage depletion-mode transistor and that contacts the second gate contact pad. The first gate contact pad contacts the second source contact pad and/or the first source contact pad contacts the second drain contact pad. The first gate contact pad and the additional contact pad extend at least partially into a peripheral portion of the first chip.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: June 2, 2020
    Assignee: Exagan
    Inventors: Domenico Lo Verde, Laurent Guillot, Fabrice Letertre
  • Patent number: 10644696
    Abstract: A power circuit switching device includes two switching terminals; a high voltage depletion mode transistor and a low voltage enhancement mode transistor arranged in series between the two switching terminals; a control circuit having a first input for receiving a switching signal and a second input for receiving a signal for activating the device, the control circuit being configured to put the switching device into an inactive state or an active state; a driver circuit for applying the switching signal to the gate of the high voltage transistor, the driver circuit being supplied with a first voltage from a first voltage source (VDR+) and with a second voltage from a second voltage source (VDR?), the first and second voltages being respectively higher and lower than the threshold voltage of the high voltage transistor; and at least one programming module associated with the driver circuit, configured to program the incoming current which is to be injected at the gate of the high voltage transistor, and the o
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: May 5, 2020
    Assignee: Exagan
    Inventors: Laurent Guillot, Thierry Sutto, Eric Moreau