The classification of fixtures can be divided into three types: process assembly fixtures, project testing fixtures and circuit board testing fixtures. Blandt dem, process assembly jigs include assembly jigs, welding jigs, disassembly jigs, dispensing jigs, irradiation jigs, adjustment jigs and cutting jigs; Project testing fixtures include life testing fixtures, packaging testing fixtures, environmental testing fixtures, optical testing fixtures, shielding testing fixtures, sound insulation testing fixtures, etc.; Circuit board test fixtures mainly include ICT test fixtures, FCT functional fixtures, SMT furnace fixtures, BGA test fixtures, og så videre.