Electronic device housing and method for making the same

Abstract

An electronic device housing includes a substrate and a nano titanium dioxide coating formed on the substrate. The nano titanium dioxide coating has a thickness of about 10-100 nm. The nano titanium dioxide coating is formed of rutile crystals or composite crystals formed of rutile and anatase. A method for making the electronic device is also described.

What is claimed is: 
     
         1 . A method for making electronic device housing, comprising:
 providing a substrate;   vacuum sputtering a nano titanium dioxide coating on the substrate, the nano titanium dioxide coating being formed of rutile crystals or composite crystals formed of rutile and anatase, and having a thickness of about 10 nm to about 100 nm.   
     
     
         2 . The method as claimed in  claim 1 , wherein vacuum sputtering the nano titanium dioxide coating is carried out by using oxygen gas and argon gas, the oxygen gas and the argon gas having a total pressure of about 0.05 Pa to about 0.29 Pa. 
     
     
         3 . The method as claimed in  claim 2 , wherein the oxygen gas has a pressure of about 0.01 Pa to about 0.225 Pa. 
     
     
         4 . The method as claimed in  claim 1 , wherein vacuum sputtering the nano titanium dioxide coating is carried out by using a titanium target, the titanium target is set with an output power of about 3000 W to about 4000 W. 
     
     
         5 . The method as claimed in  claim 1 , wherein the nano titanium dioxide coating is vacuum sputtered at a rate of about 0.3 nm/s to about 0.5 nm/s. 
     
     
         6 . The method as claimed in  claim 1 , further comprising a step of spraying a base paint coating on the substrate before forming the nano titanium dioxide coating. 
     
     
         7 . The method as claimed in  claim 6 , wherein spraying the base paint coating is carried out by using acrylic resin paint, epoxy resin paint, polyurethane resin paint, or phenolic resin paint. 
     
     
         8 . The method as claimed in  claim 6 , wherein the base paint coating has a thickness of about 1 μm to about 30 μm.