Patent ID: 7033851

Claim:
A method for manufacturing a scattering reflective board, comprising steps of; painting a layer of photosensitive material on a substrate: using an optical mask for exposure and development, the pattern of the optical mask being composed of multiple strips arranged at intervals and multiple irregularly arranged circles which are overlapped with each other, the optical mask having multiple strip-shaped shielding sections arranged at intervals, multiple irregularly arranged circular holes being distributed in the respective strip-shaped shielding sections, multiple irregularly arranged circular shielding sections being distributed in spacing sections between the adjacent strip-shaped shielding sections, multiple irregularly arranged arch notches and arch shielding sections being distributed on edges of the strip-shaped shielding sections, whereby the light can pass through the circular holes, arch notches and the spacing sections of the optical mask and be projected to the photosensitive material layer, after developed, multiple scattering bumps being formed on the photosensitive material layer; heating the bumps formed on the photosensitive material layer to dull and solidify the surfaces of the bumps; and sequentially laying a reflective film and a protective film on the surfaces of the substrate and the scattering bumps to form the reflective board.