SURFACE-TREATED METALLIC FOIL AND METAL CLAD LAMINATE

To provide a surface-treated metallic foil which is excellent in adhesion between a fluorine-based resin (especially, polytetrafluoroethylene (PTFE) resin) and the surface-treated metallic foil, and heat resistance.SOLUTION: A surface-treated metallic foil has a metallic foil and a surface treatment layer provided on at least one surface of the metallic foil, wherein the surface treatment layer has a Zn content of 0 mg/m2 or more and 10.0 mg/m2 or less and a Cr content of 1.0 mg/m2 or more and 7.0 mg/m2 or less, on the surface opposite to the metallic foil of the surface treatment layer, an N/Si ratio that is an atom ratio of N to Si measured by X-ray photoelectron spectroscopy (XPS) is 0.80 or more and 5.0 or less, and on the surface opposite to the metallic foil of the surface treatment layer, ten point average roughness Rz measured according to JIS B 0601-1982 is 0.50 μm or more and 8.00 μm or less.SELECTED DRAWING: None 【課題】フッ素系樹脂（特にポリテトラフルオロエチレン（ＰＴＦＥ）樹脂）との密着性、及び耐熱性に優れた表面処理金属箔を提供する。【解決手段】金属箔と、金属箔の少なくとも一方の表面に設けられる表面処理層とを備えた表面処理金属箔であって、表面処理層は、Ｚｎ含有量が０ｍｇ／ｍ２以上１０．０ｍｇ／ｍ２以下、Ｃｒ含有量が１．０ｍｇ／ｍ２以上７．０ｍｇ／ｍ２以下であり、表面処理層の金属箔と反対側の表面における、Ｘ線光電子分光法（ＸＰＳ）により測定される、Ｓｉに対するＮの原子比率であるＮ／Ｓｉ比が０．８０以上５．０以下であり、かつ、表面処理層の金属箔と反対側の表面における、ＪＩＳ Ｂ ０６０１－１９８２に準拠して測定される十点平均粗さＲｚが０．５０μｍ以上８．００μｍ以下である、表面処理金属箔。【選択図】なし