Insulating circuit board and power semiconductor apparatus employing the same
US6504110B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2000 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Dec 17, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49156
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In order to restrict a local concentration of an electric field in a conductor layer end portion of an insulating circuit board and increase a partial electric discharge starting voltage, thereby improving an insulating reliability of the insulating circuit board and a power semiconductor apparatus employing the same, the present invention provides a method of manufacturing a insulating circuit board comprising the step of applying a voltage between the circuit patterns of the insulating circuit board in an atmospheric or depressurized gas so as to allow the circuit board to discharge electricity, or irradiating a laser beam, thereby a projection shape of the end portion of the electrode conductor is melted and smoothened so as to restrict the concentration of the electric field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.