Fault isolation by conquering obstruction effect of resistor in complex cases analysis

Resistor plays a key role in circuit designer´s view as it was indispensable for the whole circuit function. But for integrated circuit failure analysis, the effect of resistor contained both guidance and as well as blocks to find the root cause. The obstruction effect of resistor was seldom studied in failure analysis. This paper presented how resistor to be block for failure analysis. And how to conquer the obstruction effect was also studied which will be helpful in analyzing complicated failure cases.