| 摘要 |
Provided is an utrathin copper foil which has improved thickness accuracy of an ultrathin copper layer on a supporting copper foil. An ultrathin copper foil which is provided with a supporting copper foil, a releasing layer that is laminated on the supporting copper foil, and an ultrathin copper layer that is laminated on the releasing layer. The thickness occuracy of the ultrathin copper layer as determined by a weight thickness method is 3.0% or less. |
