PURPOSE: To reduce irradiation amt., to improve roughening of a resist surface after exposure, to simplify processes, and to lower cost by forming a thin electric ally conductive film on a glass substrate, coating it with an electron beam resist, and executing exposure and development.

CONSTITUTION: A thin transparent conductive film 11 is formed on a glass substrate 10 by the vapor deposition, sputtering, or the like method, and a photoresist, such as electron beam resist 12, is formed on the film 11 in a proper film thickness by the spin coating method, and solvent is removed by baking. The glass substrate 10 is set to a substrate holder 14 and the electron beam resist 12 is irradiated with electron beams 13 in accordance with a ring band pattern. The resist 12 is developed immediately without removing the film 11 to form a ring band 12a. When the resist 12 is of a positive type, such as, PMMA, the parts irradiated with the beams 13 are dissolved off.