Evaluation of Charge Characteristics on Dielectric Surfaces
Friction or rubbing on objects can easily induce surface charge. This accumulated charge may trigger sparks as effective ignition sources in explosive environments. It is important to investigate the charging characteristics to identify possible ignition source for explosion prevention. The NMC performs such investigations for various applications of dielectric materials, including those for use on marine off-shore platforms environment.
Evaluation of Dielectric Characteristics of Encapsulation Material
New power electronics devices can potentially operate with minimal cooling requirements at high temperatures. To develop this technology for more electrical aircraft, the limiting factors lie in the packaging and interconnections of the dice in power module. The NMC supports R&D work in high temperature and high voltage encapsulation design and tests for such devices. We also evaluate the encapsulation’s performance and life span under harsh conditions.
Electrical Impedance Characterisation of Devices
DC parametric and impedance spectrum measurement systems for electrical characterisation of MEMS and semiconductor devices. The characterisation capabilities system includes DC electrical parameters measurement system for voltage-current, power and pulse measurement at low level signal, Low frequency impedance (L, C, R) measurement system for precision measurement impedance measurement up to 1 MHz, and high frequency impedance and frequency response analyser system for measurement up to 100 MHz. Measurement capabilities are also available for small signals and impedance spectroscopy characterisations of devices and materials.
Characterisation of Measuring Network such as body impedance network, perception and reaction network, let-go network as specified in IEC 60990 for measurement of touch current and protective current for safety evaluation of apparatus are done using equivalent circuit network. Leakage current and patient auxiliary currents network as specified by IEC60601 for medical electrical equipment, and resistivity measurement system is using equivalent circuit network to calibrate the 4-point surface.