Get in touch with test ,Open/short test,Resistance capacitance test test,diode, triode,mosfet test,No power on hybrid test,Boundary scan chain test,Power on combined method test. This paper offers the attributes of PCBs with thick conductor layers. The fields of software, design and style concepts and processing restrictions with the PCBs are mentioned. https://16-layer5-orderhdihigh-fr61715.ageeksblog.com/30207300/copper-based-pcb-for-led-an-overview