Method of manufacturing a thermal conductive circuit board with grounding pattern connected to a heat sink
US7059042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Jun 13, 2006 |
| Priority date | — |
| Expiry date | Jan 7, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49172
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sheet-like thermally conductive resin composition containing 70 to 95 wt. % inorganic filler and 5 to 30 wt. % thermosetting resin composition, a lead frame as a wiring pattern, and an electrically conductive heat sink with a metal pole placed therein are superposed, heated and compressed, and thus are combined to form one body. Consequently, a thermally conductive circuit board with a flat surface is obtained in which a grounding pattern is grounded to the heat sink inside the insulating layer. Thus, the grounding pattern and the heat sink can be connected electrically with each other in an arbitrary position inside the insulating layer of the thermally conductive circuit board. Accordingly, there are provided a thermally conductive circuit board with high heat dissipation, high conductivity and high ground-connection reliability, a method of manufacturing the same, and a power module allowing its size to be reduced and its density to be increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.