Patents Assigned to Aehr Test Systems
  • Patent number: 12584958
    Abstract: A tester apparatus is described of the kind having contact with terminals on a wafer for purposes of testing the wafer. A dielectric gas is used to reduce arcing between the contact. A stationary structure and a portable structure have complimentary gas interfaces that engage when the portable structure engages with the stationary structure. A gas box has a channeling block connected to a dielectric gas pressure regulator and a nitrogen gas pressure regulator and connected to a gas supply passage to selectably provide nitrogen or dielectric gas to the gas supply passage. A tray has a portion that is electrically conductive to make contact with a rear wafer terminal, vacuum passages, and each vacuum passage has an enlarged section to reduce.
    Type: Grant
    Filed: December 27, 2023
    Date of Patent: March 24, 2026
    Assignee: AEHR TEST SYSTEMS
    Inventors: Donald P. Richmond, II, Jovan Jovanovic, Scott E. Lindsey
  • Publication number: 20250251438
    Abstract: A leakage detection circuit for connecting to a device includes an input voltage terminal, a source voltage terminal for connection to a source of the respective device, a voltage monitor terminal, a reference voltage terminal, a first switch and a second switch. The first switch has a switch terminal connected to the input voltage terminal, an output terminal connected to the source voltage terminal, and an input terminal connected to the voltage monitor terminal. The second switch has a switch terminal connected to the voltage monitor terminal, an input terminal connected to the input voltage terminal, and an output terminal connected to the reference voltage terminal.
    Type: Application
    Filed: February 6, 2025
    Publication date: August 7, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Alistair N. SPORCK, Richard H. BREINLINGER, Timothy R. TONN, Alberto CALDERON, Donald P. Richmond, II
  • Publication number: 20250224423
    Abstract: A method of testing an integrated circuit of a device is described. Air is allowed through a fluid line to modify size of a volume defined between the first and second components of an actuator to move a contactor support structure relative to the apparatus and urge terminals on the contactor support structure against contacts on the device. Air is automatically released from the fluid line through a pressure relief valve when pressure of the air in the fluid line reaches a predetermined value. The holder is moved relative to the apparatus frame to disengage the terminals from the contacts while maintaining the first and second components of the actuator in a substantially stationary relationship with one another. A connecting arrangement is provided including first and second connecting pieces with complementary interengaging formations that restricts movement of the contactor substrate relative to the distribution board substrate in a tangential direction.
    Type: Application
    Filed: March 26, 2025
    Publication date: July 10, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Scott E. Lindsey, Junjye Yeh, Jovan Jovanovic, Seang P. Malathong
  • Publication number: 20250208202
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Application
    Filed: March 7, 2025
    Publication date: June 26, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Patent number: 12326472
    Abstract: A cartridge, including a cartridge frame, formations on the cartridge frame for mounting the cartridge frame in a fixed position to an apparatus frame, a contactor support structure, a contactor interface on the contactor support structure, a plurality of terminals, held by the contactor support structure, for contacting contacts on a device, and a plurality of conductors, held by the contactor support structure, connecting the interface to the terminals.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: June 10, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Scott E. Lindsey, Jovan Jovanovic, David S. Hendrickson, Donald P. Richmond, II
  • Patent number: 12298328
    Abstract: A method of testing an integrated circuit of a device is described. Air is allowed through a fluid line to modify a size of a volume defined between the first and second components of an actuator to move a contactor support structure relative to the apparatus and urge terminals on the contactor support structure against contacts on the device. Air is automatically released from the fluid line through a pressure relief valve when a pressure of the air in the fluid line reaches a predetermined value. The holder is moved relative to the apparatus frame to disengage the terminals from the contacts while maintaining the first and second components of the actuator in a substantially stationary relationship with one another. A connecting arrangement is provided including first and second connecting pieces with complementary interengaging formations that restricts movement of the contactor substrate relative to the distribution board substrate in a tangential direction.
    Type: Grant
    Filed: March 12, 2024
    Date of Patent: May 13, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Scott E. Lindsey, Junjye Yeh, Jovan Jovanovic, Seang P. Malathong
  • Patent number: 12292484
    Abstract: A tester apparatus is provided. Slot assemblies are removably mounted to a frame. Each slot assembly allows for individual heating and temperature control of a respective cartridge that is inserted into the slot assembly. A closed loop air path is defined by the frame and a heater and cooler are located in the closed loop air path to cool or heat the cartridge with air. Individual cartridges can be inserted or be removed while other cartridges are in various stages of being tested or in various stages of temperature ramps.
    Type: Grant
    Filed: September 5, 2024
    Date of Patent: May 6, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps
  • Publication number: 20250138086
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Application
    Filed: December 30, 2024
    Publication date: May 1, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Patent number: 12282062
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Grant
    Filed: October 16, 2024
    Date of Patent: April 22, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Patent number: 12265136
    Abstract: A tester apparatus is provided. Slot assemblies are removably mounted to a frame. Each slot assembly allows for individual heating and temperature control of a respective cartridge that is inserted into the slot assembly. A closed loop air path is defined by the frame and a heater and cooler are located in the closed loop air path to cool or heat the cartridge with air. Individual cartridges can be inserted or be removed while other cartridges are in various stages of being tested or in various stages of temperature ramps.
    Type: Grant
    Filed: September 5, 2024
    Date of Patent: April 1, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps
  • Publication number: 20250093398
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus, including an insertion and removal apparatus, thermal posts, independent gimbaling, the inclusion of a photo detector, a combination of thermal control methods, a detect circuitry in a socket lid, through posts with stand-offs, and a voltage retargeting.
    Type: Application
    Filed: November 14, 2024
    Publication date: March 20, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps, Scott E. Lindsey
  • Publication number: 20250093400
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus, including an insertion and removal apparatus, thermal posts, independent gimbaling, the inclusion of a photo detector, a combination of thermal control methods, a detect circuitry in a socket lid, through posts with stand-offs, and a voltage retargeting.
    Type: Application
    Filed: November 26, 2024
    Publication date: March 20, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps, Scott E. Lindsey
  • Publication number: 20250093399
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus, including an insertion and removal apparatus, thermal posts, independent gimbaling, the inclusion of a photo detector, a combination of thermal control methods, a detect circuitry in a socket lid, through posts with stand-offs, and a voltage retargeting.
    Type: Application
    Filed: November 26, 2024
    Publication date: March 20, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps, Scott E. Lindsey
  • Patent number: 12253560
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Grant
    Filed: September 11, 2024
    Date of Patent: March 18, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Publication number: 20250085338
    Abstract: A cartridge, including a cartridge frame, formations on the cartridge frame for mounting the cartridge frame in a fixed position to an apparatus frame, a contactor support structure, a contactor interface on the contactor support structure, a plurality of terminals, held by the contactor support structure, for contacting contacts on a device, and a plurality of conductors, held by the contactor support structure, connecting the interface to the terminals.
    Type: Application
    Filed: November 22, 2024
    Publication date: March 13, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Scott E. Lindsey, Jovan Jovanovic, David S. Hendrickson, Donald P. Richmond, II
  • Publication number: 20250085337
    Abstract: A cartridge, including a cartridge frame, formations on the cartridge frame for mounting the cartridge frame in a fixed position to an apparatus frame, a contactor support structure, a contactor interface on the contactor support structure, a plurality of terminals, held by the contactor support structure, for contacting contacts on a device, and a plurality of conductors, held by the contactor support structure, connecting the interface to the terminals.
    Type: Application
    Filed: November 22, 2024
    Publication date: March 13, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Scott E. Lindsey, Jovan Jovanovic, David S. Hendrickson, Donald P. Richmond, II, II
  • Patent number: 12228609
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Grant
    Filed: October 17, 2023
    Date of Patent: February 18, 2025
    Assignee: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Publication number: 20250044348
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Application
    Filed: October 16, 2024
    Publication date: February 6, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Publication number: 20250004042
    Abstract: A tester apparatus is described. Various components contribute to the functionality of the tester apparatus to facilitate movement of a wafer pack holding a vacuum without human oversight. These functionalities include a latch system to keep the wafer pack intact and a pressure sensing system to detect and relay a pressure in the wafer pack.
    Type: Application
    Filed: September 11, 2024
    Publication date: January 2, 2025
    Applicant: AEHR TEST SYSTEMS
    Inventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
  • Publication number: 20240426939
    Abstract: A tester apparatus is provided. Slot assemblies are removably mounted to a frame. Each slot assembly allows for individual heating and temperature control of a respective cartridge that is inserted into the slot assembly. A closed loop air path is defined by the frame and a heater and cooler are located in the closed loop air path to cool or heat the cartridge with air. Individual cartridges can be inserted or be removed while other cartridges are in various stages of being tested or in various stages of temperature ramps.
    Type: Application
    Filed: September 5, 2024
    Publication date: December 26, 2024
    Applicant: AEHR TEST SYSTEMS
    Inventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps