Method for assessing service lives of fuses by determining activation energy of melts

Abstract

The invention discloses a method for assessing service lives of fuses by determining activation energy of melts. The method comprises the steps that accelerating aging test of different accelerated stresses is conducted on a plurality of sets of fuses, metal electromigration service lives of the melts under different temperatures are obtained according to a plurality of sets of test data, the activation energy of the melts is calculated in the curve fitting method, parameters of service life assessing models of the fuses are determined, and therefore the service lives of the melts under different conditions can be calculated, and the activation energy of the melts is determined in a test method to assess the service lives of the fuses. Compared with empirical data adoption in the prior art, the method can improve accuracy of assessment of the service lives of the fuses.

Description

technical field [0001] The invention relates to a method for evaluating the life of a fuse, in particular to a method for evaluating the life of a fuse by determining the activation energy of a melt. Background technique [0002] During the use of the fuse, due to the current flowing through itself and the influence of the external environment, it will inevitably undergo aging and degradation, which will affect the service life. Studies have shown that as long as the operating environment can be guaranteed, the life of the fuse depends mainly on the state of the melt. [0003] The main aging mechanism of the fuse melt under energized conditions is metal electromigration, that is, ion migration in the metal. This migration will cause mass loss in a local area and voids, or mass accumulation and hillocks or solidification. The burrs cause metal defects, increase the resistance, cause local overheating, and the melt temperature rises. The high temperature will accelerate the p...

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Problems solved by technology

[0004] The patent documents published by the applicant are "intelligent fuse life test system", "fuse life characteristic data test and evaluation system and its evaluation method", "man-machine interactive fuse life test and evaluation system" and "fuse In the "Automatic Temperature Measurement System for Devices", several problems such as the life test system, the life evaluation method with variable acceleration factors, the automatic analysis and identification of invalid life test data, and the automatic temperature measurement were solved, but the melt activation energy has been using empirical data. , has not been determined by the test method, which will affect the accuracy of the life evaluation of the fuse

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