Patent ID: 7504276

Claim:
A method for manufacturing a micro device having a micro system structure, the method comprising the steps of: forming the micro system structure on a support substrate; and forming a first protection film on the micro system structure, wherein the first protection film is formed by a PVD method, a CVD method, an ion plating method, an evaporation method, an ALD method, a spin coating method, or a printing method so that the first protection film protects the micro system structure from collision of a particle, the particle has a dimension of d in meter, a density of ρ in kg/m 3 and a collision velocity of ν in m/s, first protection film has a thickness of h in meter, the first protection film is made of material having a yielding strain of ε B and a nano indentation hardness of Ha in kgf/m 2 , the nano indentation hardness is obtained by using a Berkovich tip with applying load of 0.5 gf, the nano indentation hardness of the first protection film satisfies a following relationship: Ha > c ′ · d 3 · ρ · v 2 h 3 · ɛ B , the c′ in the relationship represents a constant in a range of 5.5×10 −6 ≦c′≦7.6×10 −6 , the first protection film is made of at least one of SiN, TiN, DLC, CBN, TiC, SiC, CrN, TiCN, SiON and TiAlN, and the micro system structure includes a diaphragm structure.