Component reliability testingComponent reliability testing evaluates the failure behavior of electronic or mechanical components under specific environments, verifying design stability and material quality while predicting service life. The tests cover environmental, stress, and lifetime evaluation, helping to reduce field failure rates and improve product quality. Major test items include environmental reliability, life and accelerated aging, and electrical and mechanical reliability testing, ensuring component stability and reliability across a wide range of application environments and strengthening product competitiveness.), is a test conducted on electronic or mechanical components under specific environmental, electrical, mechanical, and time conditions to assess their ability to operate without failure within the specified usage cycle. Its core purpose is to verify the stability of component design and evaluate the quality of materials and processes.Predict the actual service life and detect potential failure modes in advance.

Reliability testing is not a single test item, but a complete verification process that encompasses environmental, stress, and lifespan assessments.As electronic products are applied in automotive, industrial, medical, and high-reliability systems, any component failure may lead to system downtime or functional abnormalities, high repair or warranty costs, damage to brand reputation, and safety risks for users, among others.Therefore, through reliability testing, the market failure rate can be reduced before mass production or market launch, enhancing the overall quality of the product, further meeting international standards and customer requirements, and establishing confidence in long-term stable supply with customers.

Common reliability test items for components can be divided into four areas: environmental reliability testing, life and accelerated aging testing, electrical reliability testing, and mechanical reliability testing.Component reliability testing is not only a part of quality control but also the foundation of product value and competitiveness. Through comprehensive and rigorous testing verification, the risk of failure can be effectively reduced, ensuring that products demonstrate stable, reliable, and long-term performance in various application environments.

Overall structure of component reliability verification

The reliability assessment of components cannot be completed with a single test, but requires multiple evaluations.Environment, lifespan and electricalThree levels to comprehensively verify the component's tolerance and failure mechanisms under actual application conditions.

Environmental stress testing is mainly used to simulate the temperature, humidity, and mechanical stress conditions that power components may encounter during manufacturing, packaging, transportation, and actual operating environments. By accelerating the process, potential weaknesses in materials, packaging, or structures can be exposed earlier, effectively assessing the structural stability of power components in harsh automotive and industrial environments. Common test items include:

• Preconditioning (PC): Simulating reflow and moisture exposure conditions

• High Accelerated Temperature and Humidity Test (Autoclave, AC / UHAST): Assessing packaging moisture resistance and interface reliability.

• Temperature Cycling Test (TC): Verify the thermal fatigue behavior of solder joints and materials.

• Terminal Strength Test (TS): Confirm the mechanical strength of the terminal and packaging.

• Resistance to Solder Heat (RSH)

• Thermal Resistance (TR): Assessing the heat dissipation efficiency of power components.

• Solderability Test (Solderability, SD)

• Whisker Growth Evaluation (WG)

• Constant Acceleration (CA)

• Vibration Variable Frequency (VVF)

• Mechanical Shock Test (Mechanical Shock, MS)

Accelerated life testing is one of the core items for verifying the reliability of power components, applicable to IGBT and MOSFET in high-power applications such as inverters and automotive power modules.High temperature, high humidity, and bias conditionsto simulate the aging and failure behavior of components under long-term operation, MA-tek can plan suitable lifespan test conditions based on the characteristics of the components and application scenarios. Common items include:

• High Temperature High Humidity Reverse Bias Test (H3TRB): Assessing degradation caused by the interaction of moisture and electric field.

• Intermittent Operational Life Test (IOL)

• Power Temperature Cycling: Simulating actual on-off load scenarios

• High Temperature Reverse Bias Test (HTRB): Assessing the long-term voltage withstand capability of structures and junctions.

• High-Temperature Gate Bias Test (HTGB): Confirm the reliability of the gate oxide layer and dielectric.

• Power Cycling Test (Power Cycling, PCsec / PCmin): Simulates repeated power switching and thermal stress accumulation effects.

Electrical verification is used to confirm the stability of electrical parameters of power components before and after testing, and is combined with special electrical tests to assess their tolerance limits and failure modes, including: