METAL FOIL WITH CARRIER, AND MANUFACTURING METHOD FOR WIRING BOARD

摘要

A metal foil (10) with a carrier has a carrier (11), an ultrathin metal foil layer (12), and a release layer (13) located therebetween. The release layer (13) has a thickness of 1 nm to 1 μm. The carrier (11) has extension parts (111a, 111b) that extend from at least a portion of the outer edge of the ultrathin metal foil layer (12). A surface protection layer is preferably provided to a surface located on the ultrathin metal foil layer side among the extension parts (111a, 111b). The surface protection layer is preferably formed from an extending section of the release layer (13). The surface protection layer is preferably formed from a layer containing an anti-rust agent. The difference ΔGs in glossiness between the surface of the ultrathin metal foil layer (12) and the surface of the extension parts (111a, 111b) at an incident angle of 60°, as measured in accordance with JIS Z8741-1997, is preferably at least 30.