Patent ID: 6532431
Filing Date: 2003-03-11
Classification: G01R

Abstract:
A method of testing an integrated circuit, the method comprising the steps of:adjusting the thermal energy of the integrated circuit to a first temperature, sensing a first set of electrical characteristics of the integrated circuit at the first temperature, recording the first set of electrical characteristics in association with an identifier for the integrated circuit, adjusting the thermal energy of the integrated circuit to a second temperature, sensing a second set of electrical characteristics of the integrated circuit at the second temperature, where the electrical characteristics of the second set correspond to the electrical characteristics of the first set, recording the second set of electrical characteristics in association with the identifier for the integrated circuit, creating ratios between the corresponding recorded electrical characteristics of the first set and the recorded electrical characteristics of the second set for the integrated circuit, as determined by the identifier for the integrated circuit, applying a first categorization to the integrated circuit if the ratios are within a first limit range, and applying a second categorization to the integrated circuit if the ratios are not within the first limit range.