A New Circuit Model Detection Method via Electromagnetic Scanning
Due to the high frequency, high density and high reliability requirements, as well as the difficulty of assembly, the lower qualified yield and the higher returning rate of the high density circuit module etc, a new testing method of high-density circuit module detection by electromagnetic scanning was present in order to realize comprehensive and efficient high-density PCB detection. Firstly, the standard board and tested board were scanned to get their electromagnetic information which was further used to compare and get their differences. Then the suspected faulty areas can be found according to the difference of the electromagnetic information. Finally, the suspected faulty components would be positioned referring to the high-density PCB design files. The simulation results show that the method based on electromagnetic information is feasible in high-density circuit module detection and has a higher detection rate.
W. D. Xu et al., "A New Circuit Model Detection Method via Electromagnetic Scanning", Advanced Materials Research, Vols. 588-589, pp. 374-378, 2012