V-t test Chemitox

・High-voltage, high-reliability products
Power devices and power modules for EVs and HEVs, industrial equipment, power supply units, and high-voltage applications.
・R&D of insulating and substrate materials
PCB manufacturers, substrate material manufacturers, encapsulant manufacturers, and electronic component manufacturers evaluating new materials for adoption or reliability qualification.

As higher voltage, higher power output, and higher-density packaging become the norm, insulating materials are held to ever-stricter reliability requirements. This service supports customers in addressing challenges related to lifetime prediction and reliability evaluation, from material selection through quality assurance.

・Comparison and selection of new materials
Long-term insulation performance of candidate insulating materials, encapsulants, and substrate materials can be comparatively evaluated to support optimal material selection.
・Lifetime prediction during product development and design
V-t (Voltage-time) testing characterizes the relationship between applied voltage and time-to-breakdown, enabling estimation of insulation lifetime under actual operating voltages. Results serve as the basis for design margin setting and reliability-driven design decisions.
・Durability evaluation under high-temperature, high-humidity conditions
Testing is conducted under accelerated aging conditions including 85°C/85%RH, enabling long-term reliability evaluation under anticipated field environments.
・Failure analysis and quality improvement
For issues related to insulation degradation or breakdown, we provide data on degradation behavior and lifetime prediction to support quality improvement and recurrence prevention.

・Lifetime estimation under realistic operating conditions
V-t characteristics are derived from the relationship between applied voltage and time-to-breakdown, enabling estimation of insulation lifetime under actual operating voltage conditions — capturing time-dependent degradation that conventional withstanding voltage tests cannot.
・High-voltage capability
Voltage application up to AC/DC 10 kV is supported, enabling evaluation of insulating materials and substrate structures for high-voltage applications.
・Detailed characterization of insulation degradation behavior
Using a migration tester, micro-current monitoring tracks not only breakdown events but also the progression of degradation over time.
・Compatibility with a wide range of sample types
Supported materials include printed circuit boards, ceramic substrates, and metal-base substrates, as well as various insulating resins and film materials.
・One-stop support from test planning to analysis
We handle everything from proposing test conditions suited to the evaluation objective and product structure, through test execution and data analysis. Customers new to V-t testing can proceed with confidence.