Compressor frequency converter is a part for air condition in electric vehicle, its assembly and testing requirements are very critical, 14 core processes are included in this line as: laser marking, O - ring assembly, glass terminal assembly, circlip assembly, inspection, terminal block assembly, HV connector assembly, LV connector assembly, HV wiring assembly, film resistor assembly, IPM assembly, coil coating assembly, film resistor assembly, IPM assembly, substrate assembly, substrate assembly, substrate soldering, visual inspection, ICT testing, inverter gasket assembly, lid assembly, leakage testing and characteristic testing.