CN1901175A - Method for producing heat radiator - Google Patents
Method for producing heat radiator Download PDFInfo
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- CN1901175A CN1901175A CN 200510036138 CN200510036138A CN1901175A CN 1901175 A CN1901175 A CN 1901175A CN 200510036138 CN200510036138 CN 200510036138 CN 200510036138 A CN200510036138 A CN 200510036138A CN 1901175 A CN1901175 A CN 1901175A
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- radiator
- tube
- carbon nano
- manufacture method
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Abstract
This invention provides a method for manufacturing radiators including the following steps: providing multiple radiating fins, processing the surfaces of them to let the surfaces have charges of a first kind of electricity, processing prepared multiple carbon nm tubes to let one end of which have charges of a second kind of electricity opposite to the first, putting the electric multiple carbon nm tubes and fins in a solution to adsorb the tubes to the surfaces of the radiating fins, which applies the static adsorption character to assemble the carbon nm tubes on the surfaces of the radiating fins to be distributed more uniformly on the fins.
Description
[technical field]
The invention relates to a kind of manufacture method of radiator, particularly a kind of surface has the manufacture method of the radiator of carbon nano-tube.
[background technology]
In recent years, along with the fast development of semiconductor device integrated technique, the integrated degree of semiconductor device is more and more higher, and still, it is more and more littler that device volume becomes, and its demand to heat radiation is more and more higher, has become an important problem more and more.For satisfying this needs, various radiating modes such as fan heat radiation, water-cooled auxiliary heat dissipation and heat pipe heat radiation are extensively used, and have obtained certain radiating effect.
Most important two heat radiation approach are heat conduction and thermal convection in the radiator.Heat conduction refers to intermolecular energy exchange.The less molecule of energy contacts the back and obtains energy (by the direct contact of physical property) with the more molecule of energy.If do not have the temperature difference (as a slice independence fin) between the two, then can't realize heat conduction.Heat conduction is the main approach of fin from the thermal source draw heat.Traditional radiator can increase the higher thermal interfacial material of a conductive coefficient usually between fin and thermal source, the heat energy that thermal source is produced more effectively is transmitted on the fin.But, want to reduce temperature, thermal convection occupies very big influencing factor.Thermal convection is meant that seeing through the motion of matter realizes heat transmission, and heat energy comes from the thermal source that is surrounded by gas or liquid, and sees through molecule and move and realize thermal energy transfer.In radiator, the heat that thermal source produced finally can be delivered in the air by radiating fin, is relied on by fluid flow phenomenon is taken away.Present radiator adopts fan to dispel the heat by the mode of forced convection more.
And that the surface area of radiating effect and fin is the contact area of fin and air is relevant, and fin surface is long-pending big more, and radiating effect is just good more.General radiator is under forced convection and confined space condition restriction, desire is brought into play maximum heat-sinking capability, all improve design by every means, to increase area of dissipation, present widely used radiator mostly is the fin type design greatly, and finned radiator makes the weight of radiator and area of dissipation all reach quite desirable state.
Finned radiator in the market mainly comprises strip fin slices radiator and cylindrical fin slices radiator.Strip fin slices radiator major part is a die cast, is about to be pressed into the metal forming process that mould is cast foundry goods after the metallic high temperature fusion, and this method technology is simple, can fin be made multiple shape according to different needs.But this type of processing method is subjected to the restriction of manufacturing process, and the dense degree of its radiating fin is less, causes its area of dissipation to be subjected to certain limitation.The column type fin slices radiator has higher dense degree, thereby has relatively large area of dissipation because its radiating fin is cylindric.In addition, around the column type fin, because the resistance of fluid is less, fluid flows easily, also so easily takes away the heat on cylinder, has strengthened the effect of convection current, therefore in the radiating fin of identical table area, the column type fin all can have better heat to pass effect than long strip type fin.But cylindrical radiating fin is had relatively high expectations to manufacture craft, and it is made, and upward difficulty is bigger, thereby cost is higher.Though and its dense degree is big than the strip radiating fin, also is subjected to certain restriction, further increase can only rely on and increase entire heat dissipation fin volume.
Prior art provides a kind of manufacture method of radiator, and this method is to use chemical vapour deposition technique control growing carbon nano pipe array on the radiating fin surface.But, use the chemical vapour deposition technique carbon nano tube array grows to need on the radiating fin surface deposition one catalyst layer earlier, the uniformity coefficient of this catalyst layer will influence the uniformity coefficient of formed carbon nano pipe array, and current radiator fins spacing is very little, be subjected to the influence of this less spacing, very big in radiating fin surface deposition one even catalyst layer difficulty, cause being difficult in and grow uniform carbon nano pipe array on the radiating fin surface, finally influence the radiating effect of radiator.
In view of this, provide a kind of radiating fin spacing that is not subjected to limit, the manufacture method that forms the radiator of even carbon nano-tube on the radiating fin surface is necessary in fact.
[summary of the invention]
Below, will illustrate that a kind of radiating fin spacing that is not subjected to limits with embodiment, form the manufacture method of the radiator of even carbon nano-tube on the radiating fin surface.
For realizing foregoing, a kind of manufacture method of radiator is provided, it can may further comprise the steps: a plurality of radiating fins are provided; Described a plurality of radiating fins surface is handled, make its surface with the first electrical electric charge; The a plurality of carbon nano-tube that prepare are handled, made on the one end band and the described first electrically opposite second electrical electric charge; Charged a plurality of carbon nano-tube and charged a plurality of radiating fins are placed a liquid together, make charged a plurality of carbon nanotube adsorption to charged a plurality of radiating fins surface.
The described radiating fin surface is handled is to adopt chemical substance treatment.
Described chemical substance contains HCO
3 -, HSO
3 -, NO
3 -Or Cl
-In one or more.
Described chemical substance contains NH
4 +
Described a plurality of carbon nano-tube are handled is that described carbon nano-tube one end is statically placed in the polyeletrolyte solution.
Be statically placed in the polyeletrolyte solution process at described a plurality of carbon nano-tube one ends, described polyeletrolyte solution is heated or carry out ultrasonic oscillation.
Described polyeletrolyte solution is poly-tetraphenyl ethylene metabisulfite solution.
Described polyeletrolyte solution is polychlorostyrene diallyl dimethyl aluminum solutions.
Charged a plurality of carbon nano-tube and charged a plurality of radiating fins are being placed a liquid process together, can further heat or carry out ultrasonic oscillation to described liquid, the described heating-up temperature that liquid is heated is 40～90 ℃.
Described liquid is one or more the mixing in water, ethanol, methyl alcohol, ether, the acetate.
The length of described carbon nano-tube is 0.2～10 micron.
The diameter of described carbon nano-tube is 0.2～200 nanometer.
The described lip-deep carbon nano-tube of a plurality of radiating fins that is adsorbed onto is parallel to each other and perpendicular to the radiating fin surface.
Prior art adopts chemical vapour deposition technique at radiating fin superficial growth carbon nano pipe array, need on the radiating fin surface deposition one catalyst layer earlier, owing to be subjected to the influence of radiating fin spacing, be difficult at radiating fin surface deposition one even catalyst layer, cause on the radiating fin surface, to grow even carbon nano pipe array, thereby cause this radiator heat-dissipation inhomogeneous.Compare with prior art, the manufacture method of the radiator that present embodiment provides adopts the Electrostatic Absorption characteristic, respectively radiating fin and carbon nano-tube are handled, make their band opposite electric polarity, by electrostatic adsorption carbon nano-tube is adsorbed onto on the radiating fin surface automatically, thereby avoid at materials such as radiating fin surface deposition catalyst, eliminate the influence of radiating fin spacing and, can give full play to vertical thermal conduction characteristic of carbon nano-tube owing to can make a plurality of carbon nano-tube perpendicular to the radiator fins surface by this method.In addition,, thereby make carbon nano-tube be evenly distributed, make the heat radiation uniformity more of radiator because the radiating fin surface charging after handling is even.
[description of drawings]
Fig. 1 is the manufacture method flow chart of the radiator that provided of the technical program embodiment.
Fig. 2 is the still untreated radiating fin schematic diagram that the technical program embodiment is provided.
Fig. 3 is the treated radiating fin schematic diagram that the technical program embodiment is provided.
Fig. 4 is the treated carbon nano-tube schematic diagram that the technical program embodiment is provided.
Fig. 5 is the schematic diagram that surface that the technical program embodiment is provided has the radiator of carbon nano-tube.
Fig. 6 is the preparation that provided of the technical program embodiment and the schematic flow sheet of handling carbon nano-tube.
[embodiment]
Below in conjunction with accompanying drawing the technical program is described in further detail.
See also Fig. 1, the manufacture method of the radiator that the technical program provides may further comprise the steps: a plurality of radiating fins are provided; Described a plurality of radiating fins surface is handled, make its surface with the first electrical electric charge; The a plurality of carbon nano-tube that prepare are handled, made on the one end band and the described first electrically opposite second electrical electric charge; Described a plurality of carbon nano-tube and described a plurality of radiating fin are placed a liquid together, make carbon nanotube adsorption to described a plurality of radiating fins surface.The manufacture method of the radiator that in conjunction with the embodiments the technical program is provided again elaborates below, please in conjunction with Fig. 1 and consult Fig. 2 to Fig. 6 together.
Step 100: provide a plurality of radiating fins 10, as shown in Figure 2.Wherein this radiating fin 10 can be the radiating fin of Any shape, and it both can be plate shaped radiating fin and also can be crooked shape radiating fin, or the existing flat plate section of this radiating fin also has bending section, and this radiating fin also can further comprise a base 11.
Step 200: described radiating fin 10 surfaces are handled, make its surface with the first electrical electric charge.This processing method can be chemical method or physical method, preferably, uses chemical method to handle and promptly passes through chemical substance treatment, makes radiating fin 10 surface chargings, and generally radiating fin 10 surface chargings of handling by this method all compare evenly.Can make radiating fin 10 surperficial positively charged or negative electricity by using different chemical mass treatment radiating fin 10 surfaces.Desire to make radiating fin 10 surperficial positively chargeds, then employed chemical substance should have cation, as NH
4 +Deng, desire to make the radiating fin surface electronegative, then employed chemical substance should have anion, for example HCO
3 -, HSO
3 -, NO
3 -Or Cl
-Deng in one or more.The chemical substance that present embodiment uses is hydrochloric acid, thereby makes radiating fin 10 surfaces electronegative, as shown in Figure 3.
Step 300: a plurality of carbon nano-tube that prepare are handled, made on the one end band and the described first electrically opposite second electrical electric charge.The method that prepare at present carbon nano-tube mainly contains arc discharge method, laser the disappear method of melting and chemical vapour deposition technique.Preceding two kinds of methods generally are used for pulverous carbon nano-tube of growing, and are difficult to grow the carbon nano pipe array or the controlling carbon nanotube direction of growth, and the chemical vapour deposition technique controlling carbon nanotube direction of growth at an easy rate.Therefore, in the present embodiment, preferably, use the chemical vapour deposition technique carbon nano-tube, and make the charged macromolecule wetness technique that adopts of a plurality of carbon nano-tube one ends.
In the present embodiment, step 300 further may further comprise the steps, and as shown in Figure 6, at first, uses chemical vapour deposition technique vertical-growth one carbon nano-tube 30 arrays on a silicon substrate 32.These carbon nano-tube 30 arrays can obtain single-wall carbon nanotube array, double-walled carbon nano-tube array, array of multi-walled carbon nanotubes or above-mentioned carbon nano-tube mixing array by the condition of control chemical vapour deposition reaction.And can be 0.2～10 micron by reaction time controlling carbon nanotube 30 array length, be 0.2～200 nanometer by the caliber of response parameter controlling carbon nanotube 30 arrays such as catalyst 31 thickness.Present embodiment carbon nanotubes grown 30 arrays are single-wall carbon nanotube array, and carbon nano-tube 30 length are 1 micron, and caliber is 2 nanometers.
Then, utilize the macromolecule wetness technique, carbon nano-tube 30 1 ends are twined go up macromolecule, the correlation technique content can be consulted document Chemical Physics Letters, 2001, Vol.342,265-271, " Reversible water-solubilization of single-walled carbonnanotube by polymer wrapping ".Its embodiment comprises: controlling carbon nanotube 30 arrays one end immerses in the polyeletrolyte solution 33, make carbon nano-tube 30 arrays, one end and 34 self assemblies of polyeletrolyte molecule, even polyeletrolyte molecule 34 is wrapped in carbon nano-tube 30 arrays one end, thereby make carbon nano-tube 30 arrays one end charged.It is 1 to 24 hour that described carbon nano-tube 30 arrays place 33 times of polyeletrolyte solution, is 12 hours in the present embodiment.If will improve self assembly speed, but heated polymerizable electrolyte solution 33 or it is imposed ultrasonic oscillation.Polyeletrolyte can be according to functional group's kind difference, and the electronegative or positive electricity of difference, electronegative polyeletrolyte can be poly-tetraphenyl ethylene sodium sulphate, and the polyeletrolyte of positively charged can be polychlorostyreneization two alkene phenyl dimethyl aluminium.The polyeletrolyte solution 33 that present embodiment uses is polychlorostyreneization two alkene phenyl dimethyl aluminum solutions, and polyeletrolyte molecule 34 is polychlorostyreneization two alkene phenyl dimethyl aluminium molecules, thereby makes carbon nano-tube one end positively charged, as shown in Figure 4.
Charged a plurality of carbon nano-tube 30 are taken out from solution, promptly finish carbon nano-tube 30 handled making its charged step.
Step 400: charged a plurality of carbon nano-tube and charged a plurality of radiating fins are placed a liquid together, make charged a plurality of carbon nanotube adsorption to charged a plurality of radiating fins surface.In this step, carbon nano-tube 30 arrays of at first self assembly being finished carefully scrape, it is separated with catalyst 31 on the silicon substrate 32, then carbon nano-tube 30 arrays are suitably ground to disperse, then and charged a plurality of radiating fins 10 be positioned over jointly in the liquid, then carbon nano-tube 30 has positive charge one end and promptly can vertically be adsorbed on the radiating fin 10 that has negative electrical charge automatically because of the characteristic of Electrostatic Absorption, obtain radiator 1, as shown in Figure 5.Described liquid can be one or more mixing of water, ethanol, methyl alcohol, ether, acetate etc., uses pure water in the present embodiment.If will improve the adsorption rate of radiating fin 10 and carbon nano-tube 30, can heat described liquid or it is carried out ultrasonic oscillation, preferably, during described heating liquid, heating-up temperature is 40 ℃～90 ℃.In the present embodiment, described liquid is heated, heating-up temperature is 60 ℃.Through above-mentioned steps, because the radiating fin surface charging is evenly basic and microcosmic particle can be by the characteristic of Electrostatic Absorption, described a plurality of carbon nano-tube 30 promptly are substantially parallel to each other and perpendicular to the surface of a plurality of radiating fins 10, and mutual spacing is basic identical.
The manufacture method of the radiator that present embodiment provides is handled radiating fin and carbon nano-tube respectively, makes their bands electrically opposite, utilizes Electrostatic Absorption that carbon nano-tube is adsorbed onto on the radiating fin surface automatically.Present embodiment has been avoided at materials such as radiating fin surface deposition catalyst, thereby be not subjected to the influence of radiating fin spacing, and because carbon nano-tube is perpendicular to the radiator fins surface, make vertical thermal conduction characteristic of carbon nano-tube get performance to the limit, in addition,, make heat radiation consistent more because thereby the radiating fin surface charging evenly makes carbon nano-tube be evenly distributed.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion, and all these changes and distortion all should belong to the protection range of claim of the present invention according to technical scheme of the present invention and technical conceive.
Claims (14)
1. the manufacture method of a radiator, it may further comprise the steps: a plurality of radiating fins are provided; Described a plurality of radiating fins surface is handled, make its surface with the first electrical electric charge; The a plurality of carbon nano-tube that prepare are handled, made on the one end band and the described first electrically opposite second electrical electric charge; Charged a plurality of carbon nano-tube and charged a plurality of radiating fins are placed a liquid together, make charged a plurality of carbon nanotube adsorption to charged a plurality of radiating fins surface.
2. the manufacture method of radiator as claimed in claim 1 is characterized in that: the described radiating fin surface is handled is to adopt chemical substance treatment.
3. the manufacture method of radiator as claimed in claim 2, it is characterized in that: described chemical substance contains HCO
3 -, HSO
3 -, NO
3 -Or Cl
-In one or more.
4. the manufacture method of radiator as claimed in claim 2, it is characterized in that: described chemical substance contains NH
4 +
5. the manufacture method of radiator as claimed in claim 1, it is characterized in that: the described carbon nano-tube for preparing is handled is that described carbon nano-tube one end is statically placed in the polyeletrolyte solution.
6. the manufacture method of radiator as claimed in claim 5 is characterized in that: be statically placed in the polyeletrolyte solution process at described carbon nano-tube one end described polyeletrolyte solution is heated or carry out ultrasonic oscillation.
7. the manufacture method of radiator as claimed in claim 5 is characterized in that: described polyeletrolyte solution is poly-tetraphenyl ethylene metabisulfite solution.
8. the manufacture method of radiator as claimed in claim 5, it is characterized in that: described polyeletrolyte solution is polychlorostyrene diallyl dimethyl aluminum solutions.
9. the manufacture method of radiator as claimed in claim 1 is characterized in that: described charged a plurality of carbon nano-tube and charged a plurality of radiating fins are placed a liquid process together, described liquid is heated or carry out ultrasonic oscillation.
10. the manufacture method of radiator as claimed in claim 9, it is characterized in that: the described heating-up temperature that liquid is heated is 40～90 ℃.
11. the manufacture method of radiator as claimed in claim 1 is characterized in that: described liquid is one or more the mixing in water, ethanol, methyl alcohol, ether, the acetate.
12. the manufacture method of radiator as claimed in claim 1 is characterized in that: the length of described carbon nano-tube is 0.2～10 micron.
13. the manufacture method of radiator as claimed in claim 1 is characterized in that: the diameter of described carbon nano-tube is 0.2～200 nanometer.
14. the manufacture method of radiator as claimed in claim 1 is characterized in that: the described lip-deep carbon nano-tube of a plurality of radiating fins that is adsorbed onto is parallel to each other and perpendicular to the radiating fin surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100361388A CN100555611C (en) | 2005-07-22 | 2005-07-22 | The manufacture method of radiator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100361388A CN100555611C (en) | 2005-07-22 | 2005-07-22 | The manufacture method of radiator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1901175A true CN1901175A (en) | 2007-01-24 |
| CN100555611C CN100555611C (en) | 2009-10-28 |
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| CNB2005100361388A Expired - Fee Related CN100555611C (en) | 2005-07-22 | 2005-07-22 | The manufacture method of radiator |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7252749B2 (en) * | 2001-11-30 | 2007-08-07 | The University Of North Carolina At Chapel Hill | Deposition method for nanostructure materials |
| US6921462B2 (en) * | 2001-12-17 | 2005-07-26 | Intel Corporation | Method and apparatus for producing aligned carbon nanotube thermal interface structure |
| WO2003103854A1 (en) * | 2002-06-07 | 2003-12-18 | The Board Of Regents For Oklahoma State University | Preparation of the layer-by-layer assembled materials from dispersions of highly anisotropic colloids |
| US7182996B2 (en) * | 2002-11-22 | 2007-02-27 | Florida State University Research Foundation, Inc. | Deposting nanowires on a substrate |
| CN1189391C (en) * | 2003-07-31 | 2005-02-16 | 清华大学 | Manufacturing method of carbon nano tube paper |
| CN2672867Y (en) * | 2003-11-28 | 2005-01-19 | 鸿富锦精密工业（深圳）有限公司 | Heat radiator |
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