| 摘要 |
An ultrathin copper foil with a carrier not causing blistering at a release layer interface, having a low carrier peeling force, friendly to the environment, and enabling easy peeling of a carrier foil and an ultrathin copper foil even under a high temperature environment and a printed circuit board enabling a stable production quality of a base of a printed circuit board for fine pattern applications using the ultrathin copper foil with the carrier, that is, an ultrathin copper foil with a carrier comprising a carrier foil, a release layer, and an ultrathin copper foil, wherein the release layer is formed by a metal A for retaining a release property and a metal B for facilitating plating of the ultrathin copper foil, a content a of the metal A and a content b of the metal B forming the release layer satisfying an equation: 10≰a/(a+b)*100≰70 and a printed circuit board prepared by using such an ultrathin copper foil with a carrier.
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