PROBLEM TO BE SOLVED: To provide a thin film which is formed on a surface of a product such as a container and equipment for food and has a layer in which Ag having antibacterial effect is alloyed with Sn, and to provide a method of producing the same, and an article whose surface is coated with the thin film.SOLUTION: The antibacterial thin film is formed by forming an Ag-Sn multilayered thin film on the surface of the article through plating or physical vapor deposition and subjecting it to a heat-treatment in which this Ag-Sn multilayered thin film is heated and kept at 200-300°C and then cooled at a cooling rate of &le50°C/min.COPYRIGHT: (C)2008,JPO&INPIT【課題】本発明は食品用容器・器具等の製品表面に形成される抗菌性効果のあるAgをSnと合金化させた層を有する薄膜およびその製造方法ならびにこの薄膜によって表面を被覆された物品を提供する。【解決手段】物品の表面に、めっきあるいは物理蒸着によりAg-Sn積層薄膜を形成し、このAg-Sn積層薄膜を200℃以上300℃以下の温度で加熱・保持し、50℃/min以下の冷却速度で冷却する熱処理をすることにより、抗菌性薄膜を形成させる。【選択図】図1
