Monitoring device and monitoring method
US8321157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2010 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Jan 12, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/2849
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dummy junction which will break earlier than a target junction is arranged on a board. A history of load applied to the dummy junction until the dummy junction actually breaks is recorded, and an estimated lifetime of the target junction is calibrated when a lifetime of the dummy junction estimated by the history of the load is largely different from an actual lifetime of the dummy junction. The calibration is performed by subtracting a value of an unmeasurable load from the estimated lifetime of the target junction based on load ever applied to the target junction, and the unmeasurable load is calculated based on the difference of the actual lifetime and estimated lifetime of the dummy junction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.