Heat-dissipation structure and electronic device using the same

Abstract

A heat-dissipation structure includes a first carbon nanotube layer and a thermal interface material layer. The first carbon nanotube layer and the thermal interface material layer are stacked on each other. The first carbon nanotube layer includes at least one first carbon nanotube paper, and the density of the first carbon nanotube paper ranges from about 0.3 g/cm 3 to about 1.4 g/cm 3 . An electronic device applying the heat-dissipation structure is also disclosed.

What is claimed is: 
     
         1 . A heat-dissipation structure comprising:
 a carbon nanotube layer comprising a carbon nanotube paper comprising a plurality of carbon nanotubes, the plurality of carbon nanotubes are parallel to each other, and a density of the carbon nanotube paper ranges from about 0.3 g/cm 3  to about 1.4 g/cm 3 .   
     
     
         2 . The heat-dissipation structure as claimed in  claim 1 , wherein the carbon nanotube paper is attached to a heat source. 
     
     
         3 . The heat-dissipation structure as claimed in  claim 1 , further comprising a metal mesh layer, and the metal mesh layer and the carbon nanotube layer are stacked together. 
     
     
         4 . The heat-dissipation structure as claimed in  claim 1 , wherein the plurality of carbon nanotubes are joined end to end by van der Waals attractive force. 
     
     
         5 . The heat-dissipation structure as claimed in  claim 1 , wherein an extending direction of the plurality of carbon nanotubes is parallel to a top surface of the carbon nanotube layer. 
     
     
         6 . The heat-dissipation structure as claimed in  claim 1 , wherein the carbon nanotube layer comprises a plurality of carbon nanotube papers stacked to each other. 
     
     
         7 . The heat-dissipation structure as claimed in  claim 1 , wherein the density of the carbon nanotube paper ranges from 1.2 g/cm 3  to about 1.3 g/cm 3 . 
     
     
         8 . The heat-dissipation structure as claimed in  claim 1 , wherein a thickness of the carbon nanotube paper ranges from about 30 microns to about 120 microns. 
     
     
         9 . The heat-dissipation structure as claimed in  claim 1 , wherein a Young's modulus of the carbon nanotube paper ranges from about 200 MPa to about 2400 MPa. 
     
     
         10 . The heat-dissipation structure as claimed in  claim 1 , wherein a Young's modulus of the carbon nanotube paper ranges from about 800 MPa to about 2400 MPa. 
     
     
         11 . The heat-dissipation structure as claimed in  claim 1 , further comprising a thermal interface material layer located on the carbon nanotube layer. 
     
     
         12 . The heat-dissipation structure as claimed in  claim 11 , wherein the thermal interface material layer comprises a material selected from the group consisting of thermal silicon grease layer, thermal silicone layer, thermal glue layer, thermal conductive tape and carbon nanotube array. 
     
     
         13 . The heat-dissipation structure as claimed in  claim 11 , wherein the thermal interface material layer is a composite layer comprising thermal silicon grease and a carbon nanotube array comprising a plurality of gaps, and the thermal silicon grease is located in the plurality of gaps. 
     
     
         14 . A heat-dissipation structure comprising:
 a metal core; and   a plurality of carbon nanotube papers located on the metal core, wherein each of the plurality of carbon nanotube papers comprises a plurality of carbon nanotubes extending along an axial direction of the metal core, and a density of each of the plurality of carbon nanotube papers ranges from about 0.3 g/cm 3  to about 1.4 g/cm 3 .   
     
     
         15 . The heat-dissipation structure as claimed in  claim 14 , wherein the heat-dissipation structure is a coaxial cable having a first end connected to a fan and a second end connected to a heat source. 
     
     
         16 . The heat-dissipation structure as claimed in  claim 14 , wherein the plurality of carbon nanotubes are joined end to end by van der Waals attractive force. 
     
     
         17 . The heat-dissipation structure as claimed in  claim 14 , wherein the plurality of carbon nanotubes are parallel to each other. 
     
     
         18 . The heat-dissipation structure as claimed in  claim 17 , wherein the density of each of the plurality of carbon nanotube papers ranges from 1.2 g/cm 3  to about 1.3 g/cm 3 . 
     
     
         19 . The heat-dissipation structure as claimed in  claim 14 , wherein the plurality of carbon nanotube papers are stacked to each other. 
     
     
         20 . The heat-dissipation structure as claimed in  claim 14 , wherein a Young's modulus of each of the plurality of carbon nanotube papers ranges from about 200 MPa to about 2400 MPa.