Metal and resin composite and method for manufacturing same

A metal and resin composite, comprising:

• a copper or copper alloy substrate which is worked into a specific shape by mechanical working and is then chemically etched to dissolve a surface thereof and of which the surface is covered with a thin layer of a copper oxide formed by an oxidant under strongly basic conditions, and
• a resin composition whose main component is a polybutylene terephthalate resin;
• wherein a resin component of said resin composition is a resin composition in which the polybutylene terephthalate resin is a main component and a polyethylene terephthalate resin and/or polyolefin resin is an auxiliary component;
• wherein said resin composition contains the polybutylene terephthalate resin in a ratio of 70 to 97 wt % and the polyethylene terephthalate resin and/or polyolefin resin in a ratio of 3 to 30 wt %;
• wherein said surface of said copper or copper alloy substrate has one of the following configurations (a) to (d):
• (a) ultrafine concave and convex faces with spacing of 10 nm to 500 nm and covered with concave or convex components having diameter of 10 to 150 nm and depth or height of 10 to 500 nm,
• (b) ultrafine concave and convex faces with spacing of 30 nm to 300 nm and covered with hole openings or concave components having diameter or major axis/minor axis average of 10 to 150 nm and depth or height of 10 to 500 nm,
• (c) ultrafine concave and convex faces with spacing of at least 10 nm, in which protrusions having diameter or major axis/minor axis average of 10 to 200 nm are mixed and present over the entire surface, and
• (d) a shape in which substantially the entire surface thereof is covered with ultrafine concave and convex faces having spacing of at least 10 nm and having shape in which amorphous polygons or granules with diameter of 10 to 150 nm are continuously and partially melted together and stacked over one another;
• and
• wherein said surface is also constituted by rough faces in which large concave-convex period of the concave and convex faces is 0.5 to 10 μm as peak-valley average spacing (RSm) and a concave-convex height difference of the rough faces is 0.2 to 5 μm as maximum roughness height (Rz).