US patent US12716144
Ultrathin copper foil, a method for manufacturing the same, and an article made therefrom
Abstract
The present invention discloses an ultrathin copper foil without a carrier, that has an area weight of about 45 g/m 2 or less; a nominal thickness of about 5.0 μm or less; a tensile strength of about 40 Kgf/mm 2 or more; and a loop stiffness of 2 mN or more. Also disclosed are methods for manufacturing the present ultrathin copper foils, surface-treated ultrathin copper foils and articles made therefrom.