NOVELTY - The film (20) has an intermediate layer made of insulating material i.e. silicon nitride, and comprising silicon-containing particles on a top surface. An outermost layer is made of the insulating material as that of the intermediate layer, where density is higher than that of the intermediate layer. A bottom surface is in contact with a top surface of the intermediate layer and a top surface with asperities (21). Silicon-containing particles in the intermediate layer are placed on a boundary surface between the layers.    USE - Optically-functional film e.g. optical confinement film in a solar cell and anti-reflection film of an LCD, for a display (claimed) of an electronic device. Uses include but are not limited to a TV, a digital camera, a notebook personal computer and a portable terminal device such as cellular phone and video camera.    ADVANTAGE - The asperities are arranged on the top surface of the outermost layer and allowed to have an optical function such as scattering and not necessary to separately bond a binder to which scatterer is added, and moisture diffusion from the binder is eliminated, so that peeling due to adhesion failure or deterioration due to moisture diffusion is prevented. The display is configured with the film, so that decline in luminance or color change depending on a viewing angle is prevented and a higher-quality display is achieved. The outermost layer is formed with the silicon-containing particle as nuclei to form asperities on the top surface, so that the film is allowed to be manufactured in an easy manner.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a method for manufacturing an optically-functional film    (2) a display comprising a display panel    (3) a method for manufacturing a display.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of a display.    Display panel (10)    Substrate (11)    Optically-functional film (20)    Asperities (21)    Sealing panel (30)