Method for estimating degradation of a wire-bonded power semi-conductor module
US11474146B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2019 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Jun 28, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating degradation of a wire-bonded power semi-conductor module is provided. The method includes obtaining an indicator of degradation (Degrest_t-1); estimating an estimated indicator of degradation (Degrest_t) by a temporal degradation model; obtaining a set of on-line measure (Xon_meas_t); then, (1) converting the on-line measure (Xon_meas_t) into a deducted indicator of degradation (Degrmeas_t) by an electrical equivalence model, and (2) computing a deviation between estimated and deducted indicator of degradation (Degrest_t; Degrmeas_t); and/or (1) converting the estimated indicator of degradation (Degrest_t) into a set of on-line estimation (Xon_est_t), and (2) computing a deviation between set of on-line measure and estimation (Xon_meas_t; Xon_est_t); and correcting the estimated indicator of degradation (Degrest_t) into a corrected estimated indicator of degradation (Degrcorr_t) as a function of the computed deviation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.