Rolled copper foil
US8221897B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Jan 29, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12431
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rolled copper foil according to the present invention includes a crystal grain alignment wherein: when normalized intensity of {200}Cu plane diffraction of a copper crystal in results obtained by an X-ray diffraction pole figure measurement with respect to a rolled surface is plotted against at different values of angle α, the normalized intensity being obtained during a β scanning in the pole figure measurement, a ratio of a maximum value A of the normalized intensity with angle α in a range of 40° to 60° to a maximum value B of the normalized intensity with angle α in a range of 80° to 90° is equal to or greater than 4; and when the normalized intensity increases with increasing angle α in a range of 25° to 45°, there is essentially no area in which the normalized intensity increases stepwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.