Patent ID: 6704070
Filing Date: 2004-03-09
Classification: G02B,Y10S

Abstract:
A method for manufacturing a front-lighting light guide plate having dots on one surface thereof, comprising the steps of:(a) forming an oxide film on a crystal plane of a silicon substrate, said crystal plane being within a range of angles determined by subtracting a sectional inclination angle of 35 to 43 degrees from an angle between a surface of a dot reflection slope and a (001) crystal plane; (b) forming a resist film on said oxide film, and forming a dot pattern of said resist film; (c) etching said oxide film by using said dot pattern as a mask; (d) anisotropically etching said silicon substrate by using said oxide film as a mask to form dots which are substantially rectangular in plan view and which are substantially V-shape in section with a vertex angle of about 70.6Â°Â±2.5Â°; (e) forming a metal film on said silicon substrate; (f) stripping said metal film off so as to produce a stamper or a replica thereof; and (g) transferring said dots onto a surface of a film or a plastic sheet or plate by using said stamper or said replica.