Patents Assigned to Wolfspeed, Inc.
  • Patent number: 12721110
    Abstract: A process includes measuring at least one component parameter of a plurality of components with a testing device; and arranging at least a portion of the plurality of components in a sequential order based on the at least one component parameter with an implementation system in at least one of the following: a shipping format and a device implementation of the portion of the plurality of components. A system is disclosed as well.
    Type: Grant
    Filed: April 29, 2024
    Date of Patent: August 25, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Zachary Cole, Morgan Andrew Roddy, John R. Fraley, Jonathan K. Hayes, Adam Benjamin Barkley
  • Patent number: 12713948
    Abstract: A device includes at least one semiconductor device; a package support configured to support the at least one semiconductor device; electrical connection portions having at least one of the following: electrical connection portions extending from the package support, electrical connection portions configured as a bond wire device connection, electrical connection portions configured as a bump ball connection, and/or electrical connection portions configured as a stud bump connection. Where the electrical connection portions connect between the at least one semiconductor device and the package support.
    Type: Grant
    Filed: September 23, 2022
    Date of Patent: August 18, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Eng Wah Woo, Soon Lee Liew, Alexander Komposch, Arthur Pun
  • Patent number: 12708027
    Abstract: A semiconductor die includes a semiconductor body, and a multi-layer environmental barrier on the semiconductor body. The multi-layer environmental barrier includes a plurality of sublayers that are stacked on the semiconductor body. Each of the sublayers comprises a respective stress in one or more directions, where the respective stresses of at least two of the sublayers are different. The sublayers may include a first stressor sublayer comprising first stress, and a second stressor sublayer comprising a second stress that at least partially compensates for the first stress in the one or more directions. Related devices and methods of fabrication are also discussed.
    Type: Grant
    Filed: February 3, 2022
    Date of Patent: August 11, 2026
    Assignee: WOLFSPEED, INC.
    Inventors: Kyoung-Keun Lee, Daniel Etter, Fabian Radulescu, Scott Sheppard, Daniel Namishia
  • Patent number: 12672302
    Abstract: Transistor devices are provided. In one example, the transistor device includes a channel layer. The transistor device includes a multilayer barrier structure on the channel layer. The multilayer barrier structure includes a first Group III-nitride layer and a second Group III-nitride layer on the first Group III-nitride layer and opposite to the channel layer. The first Group III-nitride layer has a thickness greater than a thickness of the second Group III-nitride layer. An aluminum concentration of the first Group III-nitride layer is at least two times greater than an aluminum concentration of the second Group III-nitride layer.
    Type: Grant
    Filed: September 23, 2022
    Date of Patent: June 30, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Jia Guo, Kyle Bothe, Olof Tornblad, Scott Sheppard
  • Patent number: 12666642
    Abstract: A power semiconductor device includes a semiconductor layer structure comprising a wide bandgap semiconductor material. The semiconductor layer structure includes a drift region of a first conductivity type, a source region of the first conductivity type, and a well contact region of a second conductivity type adjacent the source region. A first ohmic contact comprising a first conductive material is formed on the source region. A second ohmic contact comprising a second conductive material, which is different than the first conductive material, is formed on the well contact region. A gate structure is formed on the drift region and includes a gate contact comprising a third conductive material, which is different than the first and second conductive material. Related devices and fabrication methods are also discussed.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: June 23, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Thomas E. Harrington, III, Shadi Sabri
  • Patent number: 12666941
    Abstract: A semiconductor die includes a semiconductor body having a gate, a source contact, and a drain contact thereon, a metal contact structure on the semiconductor body and electrically connected to the gate, the source contact, or the drain contact, and an encapsulation structure. The encapsulation structure includes first and second encapsulation layers of respective non-conductive materials stacked on the metal contact structure, and an opening extending therethrough to expose the metal contact structure. The opening includes a sidewall having a substantially continuous slope that extends through the first and second encapsulation layers to the metal contact structure. Related devices and fabrication methods are also discussed.
    Type: Grant
    Filed: July 30, 2021
    Date of Patent: June 23, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Christopher Hardiman, Daniel Namishia, Kyle Bothe, Elizabeth Keenan, David Santa Ana, Daniel Etter
  • Patent number: 12666658
    Abstract: A semiconductor device includes a semiconductor layer structure having a drift region of a first conductivity type and a well region of a second conductivity type above the drift region. A gate is provided on the semiconductor layer structure adjacent the well region. A buried shielding structure of the second conductivity type is provided under the well region and separated from the well region by a portion of the drift region. Related devices and fabrication methods are also discussed.
    Type: Grant
    Filed: January 5, 2023
    Date of Patent: June 23, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Madankumar Sampath, Sei-Hyung Ryu, Daniel Jenner Lichtenwalner, Woongsun Kim, Naeem Islam
  • Patent number: 12653026
    Abstract: Power semiconductor devices comprise a silicon carbide based semiconductor layer structure including an active region defined therein and a gate bond pad that is on the semiconductor layer structure and vertically overlaps the active region.
    Type: Grant
    Filed: April 4, 2022
    Date of Patent: June 9, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Thomas E. Harrington, III, Daniel Jenner Lichtenwalner, Edward Robert Van Brunt
  • Patent number: 12647083
    Abstract: A transistor device package includes a component assembly comprising an interconnect structure, a transistor die having a front surface including gate, drain, and source terminal on a first surface of the interconnect structure, and one or more passive electrical components electrically coupled to the gate, drain, and/or source terminal by the interconnect structure. A thermally conductive flange is attached to a back surface of the transistor die, which is opposite the front surface, by a conductive adhesive. Respective patterns of the conductive adhesive are provided on the first surface of the interconnect structure, and least one of the respective patterns of the conductive adhesive provides an input, output, or ground signal path for the transistor device package. Related fabrication methods are also discussed.
    Type: Grant
    Filed: June 14, 2023
    Date of Patent: June 2, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Alexander Komposch, Eng Wah Woo, Basim Noori
  • Patent number: 12648187
    Abstract: A wide band-gap semiconductor layer structure is provided that comprises a drift region having a first conductivity type and a plurality of source regions having the first conductivity type on the drift region. A plurality of trenches are provided in an upper surface of the wide band-gap semiconductor layer structure. Second conductivity type dopants are implanted into the wide band-gap semiconductor layer structure to simultaneously form well regions underneath the source regions and trench shielding regions underneath the trenches, the well regions and the trench shielding regions each having a second conductivity type.
    Type: Grant
    Filed: June 21, 2022
    Date of Patent: June 2, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Madankumar Sampath, Sei-Hyung Ryu, Naeem Islam, Woongsun Kim
  • Patent number: 12641822
    Abstract: A vertical field effect device having a body, gate dielectric, and a gate electrode, which is in a trench that extends into the body from the top surface of the body and is located between first and second source regions. The first and second regions vertically overlap the gate electrode. The first and second channel regions laterally overlap a bottom of the gate electrode, such that each channel formed in the first and second source regions have a horizontal segment where the first and second channel regions laterally overlap the bottom of the gate electrode. In another embodiment, the first and second channel regions also vertically overlap the gate electrode such that each channel formed in the first and second source regions also have a vertical segment where the first and second channel regions vertically overlap the gate electrode.
    Type: Grant
    Filed: June 19, 2020
    Date of Patent: May 26, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Daniel Jenner Lichtenwalner, Naeem Islam
  • Patent number: 12641853
    Abstract: A semiconductor device includes a semiconductor layer structure comprising a gate trench formed in an upper surface thereof, a gate finger in the gate trench, a supplemental dielectric layer on an upper surface of the gate finger and vertically overlaps the gate trench, and a gate connector on an upper surface of the supplemental dielectric layer and on an upper surface of the gate finger.
    Type: Grant
    Filed: June 23, 2022
    Date of Patent: May 26, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Madankumar Sampath, Woongsun Kim, Naeem Islam, Sei-Hyung Ryu
  • Patent number: 12620530
    Abstract: In some aspects, a device includes a substrate. A first metallization arranged on the substrate. A second metallization arranged on the substrate. A circuit arranged on the substrate and electrically connected to the first metallization and the second metallization. The first metallization and the second metallization being configured, structured, and arranged to make a solder connection to a device, where the substrate may include silicon carbide (SiC).
    Type: Grant
    Filed: September 23, 2022
    Date of Patent: May 5, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Kok Meng Kam, Eng Wah Woo, Samantha Cheang, Marvin Marbell, Haedong Jang, Jeremy Fisher, Basim Noori
  • Patent number: 12610767
    Abstract: Systems and methods for grinding semiconductor workpieces are provided. In one example, a method includes providing a surface of the semiconductor workpiece against a grinding apparatus. The grinding apparatus includes an abrasive surface. The method further includes imparting relative motion between the abrasive surface and the semiconductor workpiece to implement a grinding operation on the semiconductor workpiece. The method further includes providing a fluid to the surface of the semiconductor workpiece or the abrasive surface during the grinding operation. The fluid includes an additive. The additive includes one or more of an oxidizing agent, an etchant, a surfactant, or a lubricant.
    Type: Grant
    Filed: March 7, 2024
    Date of Patent: April 21, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Simon Bubel, Dinusha Priyadarshani Karunaratne
  • Patent number: 12598994
    Abstract: A semiconductor die includes a semiconductor body, and a multi-layer environmental barrier on the semiconductor body. The multi-layer environmental barrier includes first and second sublayers of first and second oxide materials, respectively, where the first oxide material is different than the second oxide material. Related devices and fabrication methods are also discussed.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: April 7, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Kyoung-Keun Lee, Fabian Radulescu, Scott Sheppard, Daniel Namishia
  • Patent number: 12594622
    Abstract: A crystalline material processing method includes forming subsurface laser damage at a first average depth position to form cracks in the substrate interior propagating outward from at least one subsurface laser damage pattern, followed by imaging the substrate top surface, analyzing the image to identify a condition indicative of presence of uncracked regions within the substrate, and taking one or more actions responsive to the analyzing. One potential action includes changing an instruction set for producing subsequent laser damage formation (at second or subsequent average depth positions), without necessarily forming additional damage at the first depth position. Another potential action includes forming additional subsurface laser damage at the first depth position.
    Type: Grant
    Filed: January 12, 2024
    Date of Patent: April 7, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Matthew Donofrio, John Edmond, Harshad Golakia, Eric Mayer
  • Patent number: 12593697
    Abstract: A transistor device includes a metal submount; a transistor die arranged on said metal submount; an IPD component arranged on said metal submount, and the IPD component having a baseband damping resistor arranged on a thermally conductive dielectric substrate; and a second IPD component arranged on said metal submount, and the second IPD component may include a baseband decoupling capacitor arranged on a thermally conductive dielectric substrate.
    Type: Grant
    Filed: December 23, 2022
    Date of Patent: March 31, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Haedong Jang, Mehdi Hasan, Marvin Marbell, Jeremy Fisher
  • Patent number: 12588521
    Abstract: Die attach materials are provided. In one example, the die-attach material includes a plurality of core-shell particles. Each core-shell particle includes a core and a shell on the core. The core includes a conducting material. The shell includes a metal nitride.
    Type: Grant
    Filed: February 15, 2023
    Date of Patent: March 24, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Afshin Dadvand, Devarajan Balaraman
  • Patent number: D1121577
    Type: Grant
    Filed: May 1, 2023
    Date of Patent: April 7, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Yusheng Lin, Geza Dezsi, Kuldeep Saxena
  • Patent number: D1134247
    Type: Grant
    Filed: May 10, 2023
    Date of Patent: July 14, 2026
    Assignee: Wolfspeed, Inc.
    Inventors: Brice McPherson, Shashwat Shailendra Singh, Roberto Marcelo Schupbach