Aehr Test Systems has filed a patent for a tester apparatus that includes various components such as an insertion and removal apparatus, thermal posts, independent gimbaling, a photo detector, thermal control methods, detect circuitry in a socket lid, through posts with stand-offs, and voltage retargeting. The patent claims have been canceled. GlobalData’s report on Aehr Test Systems gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Aehr Test Systems, 3D memory devices was a key innovation area identified from patents. Aehr Test Systems's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.

Tester apparatus with various components for functionality

Source: United States Patent and Trademark Office(USPTO). Credit: Aehr Test Systems

A recently filed patent (Publication Number: US20230204651A1) describes a cartridge for electronic devices that allows for testing and measurement of light emission. The cartridge includes an electronic device holder with a formation to securely hold the electronic device, which has an input contact and a light emitter. The input contact on the holder connects to the input contact on the device, providing electric power that causes the light emitter to transmit light. The cartridge also features a light detector mounted on the holder, which detects the light and generates an output electric power based on its magnitude. An output contact is connected to the light detector to measure the output electric power.

In one embodiment, the electronic device holder defines a cavity that directs and transmits the light emitted by the device to the light detector. The cavity surfaces may also have a light absorbing coating. The cartridge further includes a socket and a lid that together form the electronic device holder. A pusher plate, mounted for movement relative to the lid, allows the electronic device to move the pusher plate, enabling the transmission of light from the emitter to the detector through an opening in the pusher plate. A spring, connected between the lid and the pusher plate, allows for linear movement and deformation of the spring when the pusher plate is moved by the electronic device.

Additionally, the cartridge may include a temperature modification device on one side of the device holder, which can change the temperature of the electronic device and create a temperature differential. A heat sink on the opposing side of the holder absorbs the light emitted by the device, generating heat. A heat dissipation device is thermally connected to the heat sink to remove the generated heat.

The patent also describes a method of testing electronic devices using the cartridge. The method involves inserting an electronic device into the holder, connecting the input contacts, providing electric power to the device to emit light, detecting and transforming the detected light into output electric power, measuring the output power through an output contact, and finally removing the electronic device from the holder.

Overall, this patent presents a cartridge design that allows for the testing and measurement of light emission from electronic devices, providing a convenient and efficient solution for evaluating the performance of such devices.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.