Composite of metal and resin and method for manufacturing same
A composite of metal and resin is provided. The composite of metal and resin includes a metal piece and a resin piece, and the surface of the metal piece includes a number of micropores. Each micropore includes a first inclining hole and a second inclining hole, and the first inclining hole and the second inclining hole are disposed inclined with the surface of the metal piece. The first inclining hole and the second inclining hole are disposed symmetrical around an axis perpendicular to the surface of the metal piece, and communicate with each other on the surface of the metal piece. The resin piece is embedded to the micropores to combine with the metal piece. The bonding strength of the composite of metal and resin is increased. A method of manufacturing the composite of metal and resin is also provided.
1. A method of manufacturing the composite of metal and resin, comprising:
providing a shaped metal piece and cleaning the metal piece with a degreasing agent solution;
forming a photoresist layer with a plurality of openings on a surface of the metal piece;
forming a plurality of first inclined holes through the surface of the metal piece, wherein the first inclined holes are arranged inclined with the surface of the metal piece;
forming a plurality of second inclined holes through the surface of the metal piece, wherein the first inclined hole and the second inclined hole are arranged symmetrically around an axis perpendicular to the surface and communicate with each other on the surface to cooperatively form a micropore, thereby the plurality of first inclined holes and the plurality of second inclined holes form a plurality of micropores;
removing the photoresist layer;
inserting and heating the metal piece in an injection mold; and
injecting molten resin piece on the metal piece, the resin piece is embedded to the plurality of micropores to combine with the metal piece as the resin piece cools.
2. The method as claimed in claim 1 , wherein the first inclined holes and the second inclined holes are formed by isotropic plasma etching.
3. The method as claimed in claim 1 , wherein diameters of the first hole and the second inclined hole are in a range of about 100 nm to about 500 nm, and breadth depth ratios of the first inclined hole and the second inclined hole are in a range of about 1:3 to about 1:5.
4. The method as claimed in claim 1 , wherein the material of the metal piece is selected from the group consisting of aluminum alloy, magnesium alloy, stainless steel alloy, copper and copper alloy.
5. The method as claimed in claim 1 , wherein the resin material is crystallized-type thermoplastic resin.