Abstract: A film structure is described. The film structure includes a substrate and a metal film. The film structure is formed on the substrate by a physical vapor deposition method. A bottom diameter of particles forming the metal film is substantially between 0.05 ?m and 2 ?m, and a height of the particles of the metal film is substantially between 0.05 ?m and 3 ?m. The metal film has a brightness, a first chroma and a second chroma in a visible light region, which includes a wavelength range between 380 nm and 770 nm, the brightness is substantially between 65 and 95, the first chroma is substantially between ?2.1 and 2.1, and the second chroma is substantially between ?2.1 and 2.

Abstract: A write-once optical recording medium includes a substrate, and a recordable film formed on the substrate. The recordable film includes a recording layer containing a component selected from germanium (Ge), antimony (Sb), silicon (Si), and mixtures thereof, and a reflective layer containing a component selected from aluminum (Al), copper (Cu), silver (Ag), gold (Au), and mixtures thereof.

Abstract: A reflective alloy film having high strength, high corrosion resistance, and high reflectivity includes 0.01-2.0 at % of at least one strengthening element, 0.01-2.0 at % of at least one anti-corrosive element, 0.01-3.0 at % of at least one reflective element, and a balance amount of silver. The total atomic percentage of the strengthening element, the anti-corrosive element, and the reflective element is less than 5.0. The reflective alloy film is useful as a reflective layer or a semi-reflective layer for various electronic devices, such as flat panel displays and optical storage media.