Composite material and method for manufacturing the same
US6994917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2004 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Jan 9, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12917
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A plate of an expanded metal and two metal plates are overlaid on one another. The expanded metal plate has a plurality of meshes. The linear expansion coefficient of the expanded metal is equal to or less than 8×10−6/° C., and the thermal conductivity of the metal plates is equal to or more than 200 W/(m·K). Then, the metal plates and the expanded metal plate are subjected to hot rolling to be rolled and joined. The rolling and joining are performed in two stages. In the first stage, the meshes of the expanded metal plate are filled with the material of the metal plates. In the second stage, the rolling and joining are performed such that the composite material has a predetermined thickness. The volumetric ratio of the expanded metal plate to the composite material is in a range between 20% and 70%, inclusive. The composite material, which has an improved thermal conductivity and strength and is suitable for heat dissipating substrate, is manufactured at a reduced cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.