Reliability modeling technology for CNC PCB performance degradation based on competing failure

Abstract

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 ana-lysis and evaluation, on the basis of review of the failure mechanism and degradation failure analysis, the typical accelerated model of CNC PCB is proposed in consideration of the multiple failure mechanism competing, which provides a new method to accurately analyze and evaluate the reliability of CNC PCB. Then in consideration of the failure mechanism and relation among multiple failure modes, a thought on building the typical accelerated model of CNC PCB is advanced. Finally, through analyzing the correlation and quantifying the proportions of all failure mechanisms based on test data, the accelerated model of CNC PCB is proposed on competing failure. It provides a new method to analyze and evaluate the reliability of CNC PCB accurately.

Keywords

• CNC
• PCB
• competing failure
• reliability modeling
• performance degradation