Overview - IEC 62047-42:2022 (piezoelectric MEMS cantilever)
IEC 62047-42:2022 specifies standardized measurement methods for the electro‑mechanical conversion characteristics of piezoelectric thin films integrated on MEMS microcantilevers (unimorph structures). The standard focuses on practical, reproducible procedures to obtain accurate transverse piezoelectric coefficients for microfabricated devices used in sensors and actuators. It applies to piezoelectric thin films deposited and patterned by MEMS processes and defines test beds, measurement principles, and reporting requirements.
Key topics and technical requirements
- Test specimen and geometry: Measurement applies to unimorph microcantilevers (piezoelectric thin film on non‑piezoelectric substrate) with top/bottom electrodes and defined electrode sizes.
- Measurement scope: Procedures for both the converse transverse piezoelectric effect (actuation: applied voltage → measured displacement) and the direct transverse piezoelectric effect (mechanical input → generated charge/voltage).
- Defined parameters and symbols: Standardizes notation and quantities such as effective transverse piezoelectric coefficients (e31,f, d31,f), capacitance (C), output charge (Qout), input voltage (Vin), dielectric loss (tan δ), resonance frequency, tip displacement (D), and mechanical properties (E, ν, ρ).
- Test bed components: Specifies functional blocks and instrumentation - displacement meter, power source / actuation, and electrical measurement instruments - and their roles in accurate characterization.
- Measurement procedures: Stepwise methods to determine converse and direct coefficients, frequency response (including resonance), calibration and selection of input displacement or voltage levels to ensure linearity and meaningful coefficients.
- Reporting: Clause and annex guidance on test reports, including specimen description, fabrication/process notes, mechanical and electrical properties, measured coefficients, resonance data and uncertainty considerations.
Applications and who uses this standard
- MEMS device designers and materials engineers characterizing piezoelectric thin films (e.g., PZT on Si/SOI).
- Test labs and QA teams establishing reproducible test methods for sensors and micro‑actuators.
- Semiconductor and microfabrication manufacturers validating actuator/sensor performance for consumer, industrial and automotive applications.
- Researchers comparing electro‑mechanical conversion performance across material stacks or processes.
Related standards and resources
- This part is one element of the IEC 62047 series (Semiconductor devices - Micro‑electromechanical devices).
- Reference resources: IEC Webstore for the full standard and IEC Electropedia for terminology.
For procurement and authoritative text, obtain IEC 62047-42:2022 from the IEC Webstore.