Method and apparatus for maintaining electrically operating device temperatures
US5099908A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1990 |
| Grant date | Mar 31, 1992 |
| Priority date | — |
| Expiry date | Dec 20, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for maintaining an electrically operating device at a desired temperature during burn-in testing of the device includes immersing the device in a bath of an inert liquid having a boiling point less than the desired case temperature. The device generates heat during electrical operation which is transferred to the bath by nucleate boiling of the liquid. The device temperature is monitored until it stabilizes at a temperature between the boiling point of the liquid and the desired device temperature. An inert liquid having a boiling point greater than the desired device temperature is slowly added to the bath to modify the rate of nucleate boiling of the lower-boiling liquid, while the device temperature is simultaneously monitored, until the case temperature reaches the desired device temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.