Thin fan and manufacturing method thereof

Abstract

A manufacturing method of a thin fan comprises the steps of: providing a plastic material containing a plurality of metal particles; molding the plastic material into a housing; removing a part of a surface of the housing to form a circuit layout area at the housing; and forming a metal layer in the circuit layout area.

What is claimed is: 
     
         1 . A manufacturing method of a thin fan, comprising the steps of:
 providing a plastic material containing a plurality of metal particles;   molding the plastic material into a housing;   removing a part of a surface of the housing to form a circuit layout area at the housing; and   forming a metal layer in the circuit layout area.   
     
     
         2 . The manufacturing method of  claim 1 , wherein the plastic material comprises polyphthalamide (PPA) and/or liquid crystalline polymer (LCP), and the metal particles comprise copper particles and/or chromium particles. 
     
     
         3 . The manufacturing method of  claim 1 , wherein the step of removing a part of a surface of the housing comprises roughening the surface so as to expose the metal particles therein. 
     
     
         4 . The manufacturing method of  claim 1 , wherein the step of removing a part of a surface of the housing comprises illuminating the surface by laser. 
     
     
         5 . The manufacturing method of  claim 1 , wherein the step of forming a metal layer in the circuit layout area comprises forming the metal layer by chemical plating. 
     
     
         6 . The manufacturing method of  claim 1 , further comprising:
 disposing at least one electronic device on the metal layer; and   assembling the housing, a stator, and an impeller.   
     
     
         7 . The manufacturing method of  claim 1 , wherein the step of disposing at least one electronic device on the metal layer comprises disposing the electronic device on the metal layer by soldering. 
     
     
         8 . A manufacturing method of a thin fan, comprising steps of:
 providing a first plastic material containing a plurality of metal particles;   molding the first plastic material into a circuit layout portion;   providing a second plastic material without metal particles;   molding the second plastic material into a housing portion connected to the circuit layout portion to form a housing;   removing a part of a surface of the circuit layout portion to form a circuit layout area; and   forming a metal layer in the circuit layout area.   
     
     
         9 . The manufacturing method of  claim 8 , wherein the step of removing a part of a surface of the circuit layout portion comprises roughening the surface so as to expose the metal particles therein. 
     
     
         10 . The manufacturing method of  claim 8 , wherein the step of forming a metal layer in the circuit layout area comprises forming the metal layer by chemical plating. 
     
     
         11 . The manufacturing method of  claim 8 , further comprising:
 disposing at least one electronic device on the metal layer.