EM Visualization of Printed Circuit Board Assemblies. A Phase 1 SBIR on behalf ofUSAF; SA-ALC/LDAE

摘要

Presently, the ability to rapidly collect reliable information about the detailedcondition of a functionally suspect printed circuit board assembly (PCBA) is marginal. This data is necessary, to assure rapid and reliable PCBA repair, thereby maximizing uptime, minimizing spares stocks, etc. The need is real for both commercial and US government applications and becomes critical as electronic products become more complex (eg: one cannot treat expensive boards as expendable). Provide initial work demonstrating proof of principle' that an EM visualization system can be developed, with the capability to assess the functionality of PCBAs. In a production evaluation the system must be capable of rapid, reliable operation by technician level personnel. A personal computer controlled device, the EMSCAN, was identified, with the capability of collecting both spectral and spatial scans of PCBAs and displaying the scans. To date the unit has primarily been used as a design aid for engineers. Data acquisition (particularly the spectral data) is slow, tedious and error prone. Data analysis required extended practice, an intimate knowledge of the PCBA's operating characteristics and considerable intelligence on the part of the user. It was anticipated that the discrimination inherent in having available both spectral and spatial data, enhanced by color visualization, could provide a uniquely definitive basis for data processing. (KAR) P. 4.