Patent ID: 7684960

Claim:
A method for selecting a threshold sensitivity for detecting anomalous behavior of a semi conductor diode Junction, the threshold sensitivity being used in a semiconductor diode Junction device testing system, the method comprising the steps of: a. selecting a threshold sensitivity value such that substantially no anomalous behavior is detected; b. reducing the threshold sensitivity by a predetermined amount; c. for one time interval from a plurality of time intervals, detecting, utilizing an optical power detector, optical power emitted from the semiconductor diode junction; d. for said one time interval from said plurality of time intervals, determining, from detection of semiconductor diode Junction parameters and utilizing the threshold sensitivity, whether anomalous behavior of the semiconductor junction diode has occurred; e. for said one time interval, determining, according to predetermined criteria, whether the determination of whether anomalous behavior has occurred is a true positive (TP), a false-negative (FN), a false-positive (FP) or a true negative (TN); f. repeating steps c) through e) for each time interval in said plurality of time intervals; g. determining, according to other predetermined criteria, a true positive fraction (TPF) and a false-positive fraction (FPF), a TPF, FPF pair corresponding to the threshold sensitivity; h. repeating steps b) through g), obtaining the TPF, FPF pair corresponding to each threshold sensitivity; and i. selecting from the TPF, FPF pairs, according to a selection criterion, a desired threshold sensitivity for detection of anomalous behavior; whereby the threshold sensitivity is utilized in a threshold detector to detect anomalous behavior of the semiconductor diode Junction device.