Power source unit for driving magnetron and heatsink to be mounted on printed circuit board thereof
US6740968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Apr 21, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Since the exposed collector part 32 of one semiconductor switching element 29 is attached to the heat radiating fin 42 by coating and filling a thermal conducting filler therebetween via spacers 33, 34 and 35, and the exposed collector part 37 of another semiconductor switching element 36 is directly attached to the same heat radiating fin 42 by coating the thermal conducting filler 41 thereto without any spacer, heat resulting from switching losses can be effectively transmitted to the heat radiating fin 42 and can be radiated therefrom. To effectively transmit heat, which results from switching losses, to a heat radiating fin and to radiate the same even if two semiconductor switching elements are connected in series, a collector part is exposed on the rear side thereof, and the two semiconductor switching elements are attached to a single heat radiating fin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.