Patents Assigned to Aehr Test Systems
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Patent number: 12584958Abstract: 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: GrantFiled: December 27, 2023Date of Patent: March 24, 2026Assignee: AEHR TEST SYSTEMSInventors: Donald P. Richmond, II, Jovan Jovanovic, Scott E. Lindsey
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Publication number: 20250251438Abstract: 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: ApplicationFiled: February 6, 2025Publication date: August 7, 2025Applicant: AEHR TEST SYSTEMSInventors: Alistair N. SPORCK, Richard H. BREINLINGER, Timothy R. TONN, Alberto CALDERON, Donald P. Richmond, II
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Publication number: 20250224423Abstract: 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: ApplicationFiled: March 26, 2025Publication date: July 10, 2025Applicant: AEHR TEST SYSTEMSInventors: Scott E. Lindsey, Junjye Yeh, Jovan Jovanovic, Seang P. Malathong
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Publication number: 20250208202Abstract: 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: ApplicationFiled: March 7, 2025Publication date: June 26, 2025Applicant: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Patent number: 12326472Abstract: 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: GrantFiled: July 18, 2022Date of Patent: June 10, 2025Assignee: AEHR TEST SYSTEMSInventors: Scott E. Lindsey, Jovan Jovanovic, David S. Hendrickson, Donald P. Richmond, II
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Patent number: 12298328Abstract: 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: GrantFiled: March 12, 2024Date of Patent: May 13, 2025Assignee: AEHR TEST SYSTEMSInventors: Scott E. Lindsey, Junjye Yeh, Jovan Jovanovic, Seang P. Malathong
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Patent number: 12292484Abstract: 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: GrantFiled: September 5, 2024Date of Patent: May 6, 2025Assignee: AEHR TEST SYSTEMSInventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps
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Publication number: 20250138086Abstract: 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: ApplicationFiled: December 30, 2024Publication date: May 1, 2025Applicant: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Patent number: 12282062Abstract: 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: GrantFiled: October 16, 2024Date of Patent: April 22, 2025Assignee: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Patent number: 12265136Abstract: 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: GrantFiled: September 5, 2024Date of Patent: April 1, 2025Assignee: AEHR TEST SYSTEMSInventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps
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Publication number: 20250093398Abstract: 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: ApplicationFiled: November 14, 2024Publication date: March 20, 2025Applicant: AEHR TEST SYSTEMSInventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps, Scott E. Lindsey
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Publication number: 20250093400Abstract: 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: ApplicationFiled: November 26, 2024Publication date: March 20, 2025Applicant: AEHR TEST SYSTEMSInventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps, Scott E. Lindsey
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Publication number: 20250093399Abstract: 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: ApplicationFiled: November 26, 2024Publication date: March 20, 2025Applicant: AEHR TEST SYSTEMSInventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps, Scott E. Lindsey
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Patent number: 12253560Abstract: 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: GrantFiled: September 11, 2024Date of Patent: March 18, 2025Assignee: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Publication number: 20250085338Abstract: 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: ApplicationFiled: November 22, 2024Publication date: March 13, 2025Applicant: AEHR TEST SYSTEMSInventors: Scott E. Lindsey, Jovan Jovanovic, David S. Hendrickson, Donald P. Richmond, II
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Publication number: 20250085337Abstract: 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: ApplicationFiled: November 22, 2024Publication date: March 13, 2025Applicant: AEHR TEST SYSTEMSInventors: Scott E. Lindsey, Jovan Jovanovic, David S. Hendrickson, Donald P. Richmond, II, II
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Patent number: 12228609Abstract: 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: GrantFiled: October 17, 2023Date of Patent: February 18, 2025Assignee: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Publication number: 20250044348Abstract: 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: ApplicationFiled: October 16, 2024Publication date: February 6, 2025Applicant: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Publication number: 20250004042Abstract: 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: ApplicationFiled: September 11, 2024Publication date: January 2, 2025Applicant: AEHR TEST SYSTEMSInventors: Gaylord Lewis Erickson, II, Jovan Jovanovic
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Publication number: 20240426939Abstract: 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: ApplicationFiled: September 5, 2024Publication date: December 26, 2024Applicant: AEHR TEST SYSTEMSInventors: Jovan Jovanovic, Kenneth W. Deboe, Steven C. Steps