Patent ID: 6848972

Claim:
A surface micromachining process for a resin mold including a layer of a resin as a material of the resin mold, which layer has a product's surface forming plane, and a back surface reinforcing member for reinforcing said resin layer, characterized in that said product's surface forming plane is micromachined by means of at least two masking/blasting treatments, said treatments comprising: a primary blasting step of sticking a first mask sheet having a specific window on said product's surface forming, plane and blasting blast particles to said product's surface forming plane via said first mask sheet; and a secondary blasting step of peeling said first mask sheet, sticking a second mask sheet different from said first mask sheet on said product's surface forming plane, and blasting blast particles to said product's surface forming plane via said second mask sheet, wherein said resin as a material of said resin mold is an epoxy resin composition adapted for a tool, said epoxy resin composition containing at least an epoxy resin, a powder of metal, and aramid fibers.