CN205800352U - The composite fin of electrographite/copper - Google Patents
The composite fin of electrographite/copper Download PDFInfo
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- CN205800352U CN205800352U CN201620186938.1U CN201620186938U CN205800352U CN 205800352 U CN205800352 U CN 205800352U CN 201620186938 U CN201620186938 U CN 201620186938U CN 205800352 U CN205800352 U CN 205800352U
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Abstract
The utility model discloses the composite fin of a kind of electrographite/copper, including: fin becomes a unit heat dissipating layer with the compound rolling of one layer of electrographite layer+copper foil layer+electrographite layer, described fin can be an independent unit heat dissipating layer, or can be that multiple unit heat dissipating layer is formed by stacking, the fin of every layer includes copper foil layer and is distributed in the electrographite layer of copper foil layer top and bottom, described electrographite layer attaches, by conducting resinl, the top and bottom being distributed in copper foil layer uniformly, is formed by stacking by conducting resinl between the plurality of unit heat dissipating layer.By the way, this utility model heat sink conducts heat is effective, it may have the strongest electro-magnetic screen function.
Description
Technical field
This utility model relates to heat radiation and the electromagnetic shielding field of heat generating component in electronic product, particularly relates to a kind of people
The composite fin of work graphite/copper.
Background technology
In prior art, along with mobile phone, tablet PC or the notebook of research and development and the demand of TV and aobvious
Display screen usage amount increases, and the demand of display screen high brightness makes light emitting diode usage amount increase, for improving various electronic products
The speed of service, in current various electronic products, CPU can give out substantial amounts of heat because of high-speed cruising, also increases the heating of equipment
Amount, battery power consumption increases simultaneously, and battery capacity also and then improves so that display apparatus generates heat more because power consumption strengthens
Many, as can not be effectively controlled heating, high temperature not only makes CPU operating go wrong or loss of function, and heat-producing device also can be made to use the longevity
Life shortens.Display apparatus function increases the most now, uses part the most diversified, and quantity is many and volume is less, display device
Free space more feel not enough, the distance of each assembly closer to, be susceptible to interference.The highest because of thickness and thermal conductivity when native graphite
Problem, and electrographite is because of the highest broken property of pliability so that it is lose the most intrinsic X, Y-axis heat conductivity.
The electrographite thickness of heat sink material is taken as the leading factor with 25 microns in the market, and 40 microns have volume production but heat conductivity
The best, 70 microns can production the highest, more heat need solve, we will heat from heat generating component " A " point biography
Distribute to other point, make the body temperature of heat generating component " A " be greatly lowered.It is thus desirable to more high thermal conductivity coefficient and more large interface
Heat conduction carrier.
Utility model content
This utility model is mainly solving the technical problems that provide the composite fin of a kind of electrographite/copper, i.e.
It is good heat conduction carrier, good heat conduction effect, it may have the strongest electro-magnetic screen function.
For solving above-mentioned technical problem, the technical scheme that this utility model uses is: provide a kind of electrographite/copper
Composite fin, become with the compound rolling of one layer of electrographite layer+copper foil layer+electrographite layer including: fin
One unit heat dissipating layer, described fin can be an independent unit heat dissipating layer, or can be that multiple unit heat dissipating layer is formed by stacking, often
The fin of layer includes copper foil layer and is distributed in the electrographite layer of copper foil layer top and bottom, and described electrographite layer passes through conducting resinl
Uniform attaching is distributed in the top and bottom of copper foil layer, is formed by stacking by conducting resinl between the plurality of unit heat dissipating layer.
In one preferred embodiment of this utility model, described electrographite is high purity graphite, its purity 99.6%～
99.9%, described electrographite layer is formed through 2500 to 2800 degree sintering by polyimide thin slice, and described electrographite layer thickness exists
It it is 5 microns～80 microns after rolling superposition.
In one preferred embodiment of this utility model, described electrographite sheet is micro-20 with the total composite thickness of copper
Rice～2100 microns；Described copper foil layer thickness is 8 microns～150 microns；Described conducting resinl thickness is 5 microns～100uM micron.
In one preferred embodiment of this utility model, the profile of described copper foil layer is web-like Copper Foil, described copper foil layer with
Electrographite layer forms by repeatedly rolling continuously.
In one preferred embodiment of this utility model, described one copper foil layer+conducting resinl or electrographite layer+conducting resinl
Being a composite bed, the most stackable compound number of plies is ten layers, and its top and bottom outermost layer of the fin after final superposition is artificial
Graphite linings.
For solving above-mentioned technical problem, the technical solution adopted in the utility model also provides for answering of a kind of electrographite/copper
The preparation method of condensation material fin, comprises the steps:
The first step, double surfaces of copper foil layer process, and carry out pretreatment, use alkaline degreaser before copper foil layer laminating conducting resinl
Oil removing and pickling processes；
Second step, stacks the polyimide thin slices of 5 microns to 80 microns and native graphite, through graphitizing furnace with 2600 to
The electrographite monolithic that 2800 degree are fired；
3rd step, rolls conducting resinl by the electrographite monolithic baked in light pressure roller mode, then with multistage roller press
It is rolled into the composite sheet material of electrographite+conducting resinl+copper+conducting resinl+electrographite；
4th step, MULTILAYER COMPOSITE machine is by the electrographite layer+conducting resinl+copper foil layer+conducting resinl of composite single layer+artificial stone
Layer of ink be complex as one layer, multilamellar can continue superposition, thickness after multiple-layer stacked and the number of plies and increase, the capacity of heat transmission and electromagnetic shielding
Ability also increases.
Furtherly, described alkaline degreaser is NaOH；Described pickling processes uses the dilute sulfuric acid of less than 0.5%；Described step
In rapid one to copper foil layer cleaning sequence it is: pickling, washing, then pickling, then washes, preferably dry；Multi-laminate in described step 4
Add mode is artificial graphite linings+conducting resinl+layers of copper+conducting resinl+electrographite layer+conducting resinl+copper foil layer+conducting resinl+artificial stone
The mode superposition of layer of ink+conducting resinl+layers of copper+conducting resinl+electrographite layer, one copper foil layer+conducting resinl or an electrographite layer+lead
Electricity glue is one layer, and most stackable compound numbers of plies are ten layers, and its top and bottom outermost layer of the fin after final superposition is artificial stone
Layer of ink.
The beneficial effects of the utility model are: this utility model, except its excellent in heat dissipation effect, more has splendid electromagnetic shielding
Function, can utilize the control that heat radiation of the present utility model can obtain to the mutual interference problem between components and parts, and this utility model removes can
Control the temperature of heat generating component, and the components and parts being easily disturbed can be made to be protected by electromagnetic shielding, 3C electronic product can be had more
Stable operation characteristic and longer life-span, its heat conductivity is up to 1000～1500 W/M K, and thermal diffusion coefficient is up to
230m/S～900 m/S, because of the addition of Copper Foil, more excellent than single graphite material for electromagnetic shielding, anti-high screen interference performance
It is 60～80 decibels (10MHz～1GHz), also because of the addition of Copper Foil, makes the pliable fracture of electrographite layer and stretching resistance the best
Improved, and copper foil base material is added structure, also improves single electrographite layer without plastic shortcoming.
Accompanying drawing explanation
Fig. 1 is the structural representation of the single heat dissipating layer of composite fin of this utility model electrographite/copper；
Fig. 2 is the structural representation of the composite fin multi-layer heat dissipation layer of this utility model electrographite/copper；
Fig. 3 be the composite fin of this utility model electrographite/copper preparation method in the flow chart of step one；
Fig. 4 be the composite fin of this utility model electrographite/copper preparation method in the processing work of step 3
Skill schematic diagram；
Fig. 5 is the heat conduction trend figure of the composite fin of this utility model electrographite/copper；
In accompanying drawing, the labelling of each parts is as follows: 1, electrographite layer；2, copper foil layer；3, conducting resinl.
Detailed description of the invention
Below in conjunction with the accompanying drawings preferred embodiment of the present utility model is described in detail, so that advantage of the present utility model
Can be easier to be readily appreciated by one skilled in the art with feature, thus protection domain of the present utility model is made apparent clearly
Define.
Referring to Fig. 1 and Fig. 2, this utility model embodiment includes: the composite fin of a kind of electrographite/copper,
Including: fin becomes a unit heat dissipating layer with the compound rolling of one layer of electrographite layer 1+ copper foil layer 2+ electrographite layer 1, institute
Stating fin can be an independent unit heat dissipating layer, or can be that multiple unit heat dissipating layer is formed by stacking, and the fin of every layer includes
Copper foil layer 2 and the electrographite layer 1 being distributed in copper foil layer 2 top and bottom, described electrographite layer 1 is pasted uniformly by conducting resinl 3
The attached top and bottom being distributed in copper foil layer 2, are formed by stacking by conducting resinl 3 between the plurality of unit heat dissipating layer.
Furtherly, described electrographite layer 1 is high purity graphite, and its purity is 99.6%～99.9%；Described artificial stone
The total composite thickness of layer of ink 1 and copper foil layer 2 is at 20 microns～2100 microns；The profile of described copper foil layer 2 is web-like Copper Foil,
Described copper foil layer 2 forms by repeatedly rolling continuously with electrographite layer 1；Described copper foil layer 2+ conducting resinl 3 or an artificial stone
Layer of ink 1+ conducting resinl 3 is a composite bed, and the most stackable compound number of plies is ten layers, its top and bottom of the fin after final superposition
Outermost layer is artificial graphite linings 1.
This utility model because of the addition of copper foil base material, the tension failure value in its fin X-Y direction (horizontal direction) is
100Kg f/m ~ 200Kg f/m, is 10 times of current condition of equivalent thickness electrographite sheet.As it is shown in figure 5, X-axis and Y direction
Good for artificial graphite linings heat conduction, Z-direction is that copper foil layer heat conduction is good.No matter heat sink compound thickness is how many, its bendable knuckle
Degree is 180 degree, and bent number of times is 100 times, and without making electrographite+copper composite sheet fracture make heat dissipation reduce, this is
Single electrographite fin cannot bear more than 90 degree bending and cannot bear repeatedly bending incomparable.
Additionally because of the addition of Copper Foil in heat sink compound, can fix with metal bolts in equipment assembles and with ground terminal phase
Connect, and because the conductive characteristic of copper constitutes earth-return circuit, and fin covers on the chip of equipment, directly covers the most disturbed
Chip, constitute optimal electromagnetic shielding effect.
Refer to Fig. 3 and Fig. 4,
The preparation method of the composite fin of a kind of electrographite/copper, comprises the steps:
The first step, double surfaces of copper foil layer 2 process, and copper foil layer 2 is fitted and carried out pretreatment before conducting resinl 3, removes by alkalescence
Oil preparation oil removing and pickling processes；
Second step, stacks the polyimide thin slices of 5 microns to 80 microns and native graphite, through graphitizing furnace with 2600 to
The electrographite monolithic that 2800 degree are fired；
3rd step, rolls conducting resinl 3 by the electrographite monolithic baked in light pressure roller mode, then with multistage roller press
It is rolled into the composite sheet material of electrographite layer 1+ conducting resinl 3+ copper foil layer 2+ conducting resinl 3+ electrographite layer 1；
4th step, MULTILAYER COMPOSITE machine is by the electrographite layer 1+ conducting resinl 3+ copper foil layer 2+ conducting resinl 3+ people of composite single layer
Work graphite linings 1 be complex as one layer, multilamellar can continue superposition, thickness after multiple-layer stacked and the number of plies and increase, the capacity of heat transmission and electricity
Shielding ability also increases.
Furtherly, described alkaline degreaser is NaOH；Described pickling processes uses the dilute sulfuric acid of less than 0.5%；Described step
In rapid one to copper foil layer cleaning sequence it is: pickling, washing, then pickling, then washes, preferably dry；Multi-laminate in described step 4
Add mode is artificial graphite linings 1+ conducting resinl 3+ copper foil layer 2+ conducting resinl 3+ electrographite layer 1+ conducting resinl 3+ copper foil layer 2+ conduction
The mode superposition of glue 3+ electrographite layer 1+ conducting resinl 3+ copper foil layer 2+ conducting resinl 3+ electrographite layer 1, a copper foil layer 2+ conduction
Glue 3 or an electrographite layer 1+ conducting resinl 3 are one layer, and most stackable compound numbers of plies are ten layers, the fin after final superposition
Its top and bottom outermost layer is artificial graphite linings 1.
This utility model heat sink compound, no matter heat sink compound thickness is how many, its bent angle is 180 degree, can
Bending number of times is 100 times, and without making electrographite+copper composite sheet fracture make heat dissipation reduce, this is single electrographite
Fin cannot bear more than 90 degree bending and cannot bear repeatedly bending incomparable.No matter additionally heat sink compound is thick
Degree is how many, and its anti-high screen interference performance is 60 ~ 80db (decibel) (10MHz ~ 1GHz).
Because of the addition of Copper Foil in composite sheet fin, the good conductive properties of its copper foil base material and heat sink compound excellent
Heat conduction and heat dissipation characteristics, cannot can construct earth lead, fin and electromagnetic shielding because of limited space in equipment assembles simultaneously
During sheet, substitute with single electrographite+copper radiating rib, and then make equipment miniaturization cost-effective and be easy to assemble.
The foregoing is only embodiment of the present utility model, not thereby limit the scope of the claims of the present utility model, every
Utilize equivalent structure or equivalence flow process conversion that this utility model description and accompanying drawing content made, or be directly or indirectly used in
Other relevant technical fields, are the most in like manner included in scope of patent protection of the present utility model.
Claims (3)
1. the composite fin of electrographite/copper, it is characterised in that including: fin with one layer of electrographite layer+
Copper foil layer+electrographite layer is combined rolling and becomes a unit heat dissipating layer, and described fin can be an independent unit heat dissipating layer, or
Being can be that multiple unit heat dissipating layer is formed by stacking, the fin of every layer includes copper foil layer and is distributed in the artificial of copper foil layer top and bottom
Graphite linings, described electrographite layer attaches, by conducting resinl, the top and bottom being distributed in copper foil layer uniformly, and the plurality of unit dissipates
It is formed by stacking by conducting resinl between thermosphere；The total composite thickness of described electrographite layer and copper foil layer at 20 microns～
2100 microns；Described copper foil layer thickness is 8 microns～150 microns；Described conducting resinl thickness is 5 microns～100 microns；Described copper
The profile of layers of foil is web-like Copper Foil, and described copper foil layer forms by repeatedly rolling continuously with electrographite layer.
The composite fin of electrographite/copper the most according to claim 1, it is characterised in that: described electrographite
Layer be high purity graphite, its purity 99.6%～99.9%, described electrographite layer by polyimide thin slice through 2500 to 2800
Degree sintering forms, and described electrographite layer thickness is 5 microns～80 microns after rolling superposition.
The composite fin of electrographite/copper the most according to claim 1, it is characterised in that: a described copper foil layer+
Conducting resinl or electrographite layer+conducting resinl are a composite bed, and the most stackable compound number of plies is ten layers, after final superposition
Its top and bottom outermost layer of fin is artificial graphite linings.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620186938.1U CN205800352U (en) | 2016-03-11 | 2016-03-11 | The composite fin of electrographite/copper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620186938.1U CN205800352U (en) | 2016-03-11 | 2016-03-11 | The composite fin of electrographite/copper |
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| CN205800352U true CN205800352U (en) | 2016-12-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112888149A (en) * | 2021-01-12 | 2021-06-01 | 深圳市鑫诺诚科技有限公司 | Conductive, shielding and heat-dissipating composite material |
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2016
- 2016-03-11 CN CN201620186938.1U patent/CN205800352U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112888149A (en) * | 2021-01-12 | 2021-06-01 | 深圳市鑫诺诚科技有限公司 | Conductive, shielding and heat-dissipating composite material |
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