To comprehensively,objectively,and accurately predict the reliability of CNC PCB under the action of the external environment stress and the internal circuit,and verify whether the reliability design of CNC system could meet the requirement and the system could reliably work,the CNC PCB is investigated.Starting from crucial and key problems of the reliability analysis and evaluation,on the basis of review of the failure mechanism and degradation failure analysis,the typical accelerated model of CNC PCB is p...