摘要:
A netlike metallic foil 11null and a transparent substrate film 14 are laminated with an adhesive layer 13. The adhesive-layer 13-side surface of the metallic foil 11null may be formed with a darkening layer 12. The roughness of the adhesive-layer 13-side surface (lower surface) of the metallic foil 11null is preferably such that the maximum height Rmax be more than 0 and less than 4 nullm, more preferably more than 0 and 2 nullm or less. As long as the maximum height Rmax of this surface of the metallic foil 11null falls in the above-described range, the adhesive layer never contains air bubbles in such sizes that reflectance is adversely affected. Further, the roughness of the surface (upper surface) of the metallic foil 11null, opposite to the adhesive-layer 13-side surface, is preferably such that the arithmetic mean roughness Ra is in the range between 0.02 nullm and 1 nullm. As long as the arithmetic mean roughness Ra of this surface of the metallic foil 11null is in the above range, it is possible to efficiently conduct vacuuming to bring, into close contact, a photosensitive resin layer and a photomask in sheet form placed on the photosensitive resin layer, before effecting the pattern-wise exposure of the photosensitive resin layer.
摘要:
A process of forming a high-definition pattern by etching is provided. A photosensitive resin layer is formed on a metal substrate material having a center line-average surface roughness Ra of up to 0.10 nullm and a maximum surface roughness Rmax of up to 1.0 nullm to form a resist pattern. Then, the photosensitive resin layer provided on the metal substrate material is exposed to light to form a resist pattern. Finally, etching is carried out to form a pattern on the metal substrate material.