Composite structure male mold for manufacturing plastic micro-fluidic chip, forming method and application of composite structure male mold

The invention discloses a composite structure male mold for manufacturing a plastic micro-fluidic chip, a forming method and application of the composite structure male mold. The composite structure male mold comprises a metal substrate, an intermediate coating adhered to the metal substrate, and a plurality of micro-structure protrusions positioned on the surface of the intermediate coating, wherein the intermediate coating and the micro-structure protrusions are formed by mixing high-temperature-resistant structural adhesive and ceramic nano-particles; and the thickness of the middle coating is less than 100 microns. According to the composite structure male mold, the low-cost rapid preparation of the precise microstructure plastic chip below 10 microns can be realized, the preparation of a curved surface microstructure can be realized, and the method can be applied to the preparation of micro-fluidic chips, optical super-structure surfaces, super-hydrophobic and drag-reducing functional surfaces and the li