Electronic apparatus, a method for estimating a break, and a method for estimating a fatigue life
US9091610B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2012 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Jan 31, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/16152
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to one embodiment, a first joint unit and a second joint unit are disposed with space on a heat radiation substrate. A joint area of the second joint unit is larger than that of the first joint unit. An insulated substrate is disposed on the first joint unit and the second joint unit. A corner region of the insulated substrate contacts the first joint unit. A first sensor to measure an acceleration of vibration applied to the insulated substrate is disposed thereon. The first sensor is more adjacent to the first joint unit than the second joint unit. A response spectrum of the acceleration is calculated. An extension status of joint failure of the first joint unit is decided by comparing a frequency of a maximum peak of the response spectrum with a reference frequency. A break of the second joint unit is estimated based on the extension status
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.