Because of the complicated manufacture technique of pcb , for example , a great deal of use of ultro - microcomponent and ultro - slimwire , the quality inspection of pcb becomes very difficult and hardly automatized 隨著生產技術的提高, pcb制作工藝日趨復雜,大量超微器件和超細走線的采用,使pcb的質量檢驗成為一件非常困難的工作,難以實現(xiàn)自動化。