Patent ID: 7094520

Claim:
A process for producing an optical-panel molding die for integrally forming an optical pattern on at least one side of surfaces of an optical panel, the process comprising forming a layer of a photosensitive heat-resistant resin on a surface of a metal substrate, exposing the layer of the photosensitive heat-resistant resin to light through a mask having a pattern corresponding to the optical pattern of the optical panel, and developing the exposed layer to form a molding pattern corresponding to the pattern of the mask on the layer of the photosensitive heat-resistant resin, wherein the photosensitive heat-resistant resin is left all over the one side of surfaces of the metal substrate after developing, wherein said developing is terminated before complete dissolution of portions to be developed of the photosensitive heat-resistant resin, whereby the photosensitive heat-resistant resin is left also on areas of the metal substrate which correspond to the developed portions of the resin.