Rolled copper foil and manufacturing method thereof
US7789977B2 · kind B2 · utility
1Cited by
3References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 7, 2007 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Nov 21, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12431
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rolled copper foil applied with a recrystallization annealing after a final cold rolling step and having a crystal grain alignment satisfying a ratio of [a]/[b]≧3, where [a] and [b] are normalized average intensities of a {111}Cu plane diffraction of a copper crystal by β-scanning at α=35° and 74°, respectively, in an X-ray diffraction pole figure measurement to a rolled surface is manufactured by controlling a total working ratio in the final cold rolling step before the recrystallization annealing to be 94% or more; and controlling a working ratio per one pass in the final cold rolling step to be 15 to 50%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.