Patent ID: 8703272

Claim:
A composite of a metal and a resin, comprising: a base material comprising a magnesium alloy; a surface layer of a metal oxide on the surface of the base material having a surface configuration such that spherical formations with a diameter of 80 to 120 nm are aggregated to form periodic irregularities with a period of 0.5 to 1 μm and obtained by performing a chemical etching treatment of the base material, preparing an aqueous solution for a manganese-system conversion treatment and performing a conversion treatment by using the aqueous solution; and a resin part formed and joined to the base material by injection molding and comprising, as a main component, a thermoplastic resin composition having crystalline property, which comprises polyphenylene-sulfide with content ratio of 70 to 97 wt. % and modified polyolefin resin with content ratio of 3 to 30 wt. % and which penetrates into fine concavities with nanometer-order size of the surface layer through injection molding, to be solidified and fixed thereto.