Metal heat dissipating plate

Abstract

A metal heat dissipating plate is provided. The metal heat dissipating plate includes a metal substrate, metal cladding layers, and graphite layers. The metal cladding layers are disposed on two surfaces of the metal substrate, and the graphite layers are intercalated into the metal cladding layers. Thus, the graphite layers can firmly bond to the metal substrate by the surface structure of the metal substrate and the metal cladding layer. The carbon film is made from graphite and thus has good thermal conductivity to increase the heat dissipating effect of electronic products and thus increase the service life thereof

What is claimed is: 
     
         1 . A metal heat dissipating plate, comprising:
 a metal substrate having two opposite surfaces;   two metal cladding layers respectively disposed on the two surfaces of the metal substrate; and   two graphite layers respectively intercalated into the two metal cladding layers, wherein the graphite layers are made from graphite with a high purity of carbon content 99.9% refined by petroleum.   
     
     
         2 . The metal heat dissipating plate of  claim 1 , wherein the metal substrate is made from Cu, Al, stainless steel, or cold-rolled steel. 
     
     
         3 . The metal heat dissipating plate of  claim 2 , wherein the metal substrate has a thickness of 10 μm-1.6 mm. 
     
     
         4 . The metal heat dissipating plate of  claim 3 , wherein the metal cladding layer is made from a metal of Ni, Cr, Ni—Cr alloy, Ag, or Ti. 
     
     
         5 . The metal heat dissipating plate of  claim 4 , wherein the metal cladding layers and the graphite layers are formed by vacuum magnetron sputtering. 
     
     
         6 . The metal heat dissipating plate of  claim 2 , wherein the metal cladding layer is made from a metal of Ni, Cr, Ni—Cr alloy, Ag, or Ti. 
     
     
         7 . The metal heat dissipating plate of  claim 2 , wherein the metal substrate has smooth surfaces or rough surfaces according to the material of the metal substrate. 
     
     
         8 . The metal heat dissipating plate of  claim 1 , wherein the metal cladding layer is made from a metal of Ni, Cr, Ni—Cr alloy, Ag, or Ti. 
     
     
         9 . The metal heat dissipating plate of  claim 1 , wherein the metal cladding layers and the graphite layers are formed by vacuum magnetron sputtering.