Power cycle testing and characteristic evaluation

We would like to present the results of strain measurements conducted by attaching strain gauges and thermometers to the surfaces of power modules, both in the mounted state on a circuit board and in the unmounted state. In the mounted module, a slight delay in temperature change was observed, and correspondingly, the change in strain also appeared to be delayed. This is believed to be due to the slower transfer of heat to the module when it is mounted. At Aites, we conduct temperature cycle tests and temperature-humidity cycle tests, during which we can simultaneously measure the strain occurring in the mounted components. Please feel free to consult with us.

Our company conducts "IOL testing of discrete semiconductors." We repeatedly turn the power ON/OFF in a room temperature environment, applying stress to the device due to temperature changes caused by the device's own heat generation during power ON. During power OFF (cooling), forced cooling is also performed using a fan. Additionally, before conducting the tests, we use representative samples to make adjustments to reach the test temperature conditions. It is possible to adjust the current/time during heating and the fan capacity/timing during cooling.

At Aites Co., Ltd., high-temperature reverse bias testing (HTRB) for evaluating the oxide film and junction of power devices can be applied up to a maximum of 2000V. By monitoring the leakage current during the test, the degradation status of the device can be grasped in real-time. Since the power supply is independent, if one device fails during the test, it will not affect the other devices. Additionally, it is possible to set a failure criterion (current value) and to cut off the power supply to the device deemed faulty at the time of failure judgment. 【Specifications and Service Details】 ■ Test Voltage: Up to a maximum of DC 2000V ■ Applied Current: Up to a maximum of 14mA ■ Number of Test Devices: Up to a maximum of 8 (independent power supply) ■ Compatible Modules: TO-247, TO-220, etc. (other packages require consultation regarding connection methods) ■ Measurement Content: Monitoring of leakage current ■ Temperature Range: Up to a maximum of 200°C (85°C/85% in high temperature and high humidity conditions)