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Laser voltage probe (LVP): a novel optical probing technology forflip-chip packaged microprocessors

机译:激光电压探针(LVP):用于 n倒装芯片封装微处理器的新型光学探测技术

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摘要

A novel optical probing technique to measure voltage waveformsnfrom flip-chip packaged CMOS integrated circuits (IC) is described. ThisnIR laser based technique allows signal waveform acquisition and highnfrequency timing measurements directly from active P-N junctions throughnthe silicon backside substrate on ICs mounted in flip-chip stand-alonenor multi-chip module packages as well as wire-bond packages on which thenchip backside is accessible. The technique significantly improvesnsilicon debug and failure analysis (FA) throughput time (TPT) asncompared to backside electron-beam (e-beam) probing because of thenelimination of backside trenching and probe hole generation operations
机译:描述了一种新颖的光学探测技术,用于测量倒装芯片封装的CMOS集成电路(IC)的电压波形。这项基于nIR激光器的技术允许直接通过有源P-N结通过安装在倒装芯片独立或多芯片模块封装中的IC的硅背面衬底以及可访问芯片背面的引线键合封装来进行信号波形采集和高频定时测量。与背面电子束(e-beam)探测相比,该技术显着提高了硅调试和故障分析(FA)吞吐时间(TPT),这是由于消除了背面沟槽和探针孔生成操作

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