PURPOSE: To enhance the yield of development and to improve the performance of a stamper formed by development and that of a substrate or an optical disk by improving the wettability of the surface of a resist with a developer and enabling uniform development.

CONSTITUTION: A substrate for an optical disk and the optical disk are formed with a stamper formed with a developer contg. an anionic surfactant and spreading on a resist coated surface to be developed within 0.1sec. When the stamper has a group part 1 and a center hole 2, the substrate has a part 3 to be transferred from the group part 1 and a center hole 4. Since the wettability of the surface of the resist with the developer is improved and uniform development is enabled, the yield of development is enhanced and the performance of the stamper formed by development and that of the substrate or the optical disk are improved.