Housing for electroni device

Abstract

A housing for a portable electronic device includes a metallic base, a chemical plating layer, a primer layer, a color coating layer, a metallic luster layer, and a transparent protection layer. The chemical plating layer, the primer layer, the color coating layer, the metallic luster layer, and the transparent protection layer are coated on the metallic base in that order. The metallic luster layer defines a pattern extending through the metallic luster layer.

What is claimed is: 
     
         1 . A housing for a portable electronic device, comprising:
 a metallic base;   a chemical plating layer, a primer layer, a color coating layer, a metallic luster layer, and a transparent protection layer coated on the metallic base in that order;   wherein the metallic luster layer defines a pattern extending through the metallic luster layer for exposing the color coating layer, the color coating layer comprises acrylic resin, polyester resin, epoxy resin, amino resin, acrylate copolymer, propylene glycol methyl ether acetate, butyl ester, and pigments dispersed therein, the metallic luster layer comprises acrylic resin, polyester resin, epoxy resin, amino resin, acrylate copolymer, propylene glycol methyl ether acetate, butyl ester, pigments and aluminum oxide powder dispersed therein, the transparent protection layer is formed on the metallic luster layer for protecting the metallic luster layer from abrasion.   
     
     
         2 . The housing of  claim 1 , wherein the primer layer comprises a first connecting layer and a second connecting layer coated thereon. 
     
     
         3 . The housing of  claim 2 , wherein the first connecting layer comprises a material selected from the group consisting of polyester resin, epoxy resin, and combination thereof; and the first connecting layer also comprises pigments dispersed therein. 
     
     
         4 . The housing of  claim 2 , wherein the second connecting layer comprises a material selected from the group consisting of acrylic resin, polyester resin, epoxy resin, amino resin, acrylate copolymer, propylene glycol methyl ether acetate, butyl ester, and any suitable combination thereof; the second connecting layer also comprises pigments dispersed therein. 
     
     
         5 . The housing of  claim 1 , wherein the pigments and the aluminum oxide powder are in a nanometer scale. 
     
     
         6 . The housing of  claim 1 , wherein the transparent protection layer comprises a material selected from the group consisting of acrylic resin, polyester resin, epoxy resin, amino resin, acrylate copolymer, propylene glycol methyl ether acetate, butyl ester, and any suitable combination thereof; the transparent protection layer also comprises silicon dioxide dispersed therein. 
     
     
         7 . The housing of  claim 1 , wherein the pattern is defined in the metallic luster layer via laser engraving. 
     
     
         8 . The housing of  claim 2 , wherein the thickness of the first connecting layer is about 25 μm to about 50 μm, the thickness of the second connecting layer is about 15 μm to about 20 μm, the thickness of the color coating layer is about 15 μm to about 80 μm, the thickness of the metallic luster layer is about 2 μm to about 7 μm, and the thickness of the transparent protection layer is about 20 μm to about 80 μm.