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CN106393842B - Stretch-proof graphite dissipates pad pasting - Google Patents

Stretch-proof graphite dissipates pad pasting Download PDF

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Publication number
CN106393842B
CN106393842B CN201610119322.7A CN201610119322A CN106393842B CN 106393842 B CN106393842 B CN 106393842B CN 201610119322 A CN201610119322 A CN 201610119322A CN 106393842 B CN106393842 B CN 106393842B
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graphite
degree
parts
film
speed
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CN106393842A (en
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金闯
梁豪
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Jiangsu Stick New Materials Polytron Technologies Inc
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Jiangsu Stick New Materials Polytron Technologies Inc
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    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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Abstract

The present invention discloses a kind of stretch-proof graphite and dissipates pad pasting, is obtained by following steps：One layer graphite modified dose is coated on the upper and lower surface of Kapton and obtains treated Kapton；The graphite modified dose of component by following parts by weight forms：Pyromellitic acid anhydride, benzophenone tetracarboxylic dianhydride, diaminodiphenylmethane, dimethylformamide, N methyl pyrrolidones, ethylene glycol, dimethyl silicone polymer；After being warming up to 800 DEG C again, then with the speed of 9 ~ 11 degree/min rise to 1200 DEG C acquisition pre-burned carbonized films；Roll the carbonized film of the pre-burned of the step 4 using calender；It rises to 2400 DEG C and rises to 2900 DEG C again with the speed of 19 ~ 21 degree/min, so as to obtain the graphite film of main firing；Then the graphite film of main firing is rolled to obtain the graphite linings.The invention avoids the volume contractions in fold and graphitization sintering process, improve crystallinity and compactness.

Description

Stretch-proof graphite dissipates pad pasting
Technical field
The present invention relates to a kind of stretch-proof graphite to dissipate pad pasting, belongs to heat dissipation Filming Technology field.
Background technology
As modern microelectronic technology high-speed develops, electronic equipment（Such as laptop, mobile phone, tablet computer）Increasingly Become ultra-thin, light, this structure causes electronic equipment internal power density to significantly improve, and generated heat is not easy in operation It discharges, be easy to accumulate rapidly and form high temperature.On the other hand, high temperature can reduce the performance of electronic equipment, reliability and using the longevity Life.Therefore, Current electronic industry proposes increasingly higher demands for the heat sink material as heat control system core component, urgently A kind of high-efficiency heat conduction, light material is needed to transfer heat away from rapidly, ensures electronic equipment normal operation.
Kapton is mostly used for flexible PCB in the prior art, is obtained although having using polyimide film sintered Graphite heat radiation fin, so as to be covered on heat source, but be constrained to Kapton product quality and performances the good and the bad not Together, the performance of the two-sided pad pasting heat dissipation performance of heat dissipation has been influenced, there are following technical problems：It radiates uneven, adhesive tape easily occurs Hot-spot, the heat dissipation performance that improves product is unstable, reliability performance is poor, is unfavorable for product quality management control, influences product Competitiveness.
Invention content
It is an object of the present invention to provide a kind of stretch-proof graphite to dissipate pad pasting, which dissipates pad pasting in vertical direction and water Square to heat conductivility is improved, adhesive tape hot-spot is avoided, while realizing the uniformity of adhesive tape heat conductivility, is improved Heat dissipation performance stability, the reliability of product greatly reduces the cost of product.
In order to achieve the above objectives, the technical solution adopted by the present invention is：A kind of stretch-proof graphite dissipates pad pasting, and the graphite dissipates Attachment film in heat generating components surface, the graphite dissipate pad pasting include graphite linings, positioned at graphite layer surface heat conduction adhesive layer and Separated type material layer, this separated type material layer fit in the heat conduction adhesive layer surface opposite with graphite linings；It is characterized in that：The graphite Layer is obtained by following process, this process includes the following steps：
Step 1: Kapton is risen to 250 DEG C from room temperature, then with 2.5 ~ 3.5 degree/min, after rising to 400 DEG C Near room temperature；
Step 2: one layer of graphite modified dose of acquisition is coated on the upper and lower surface of the Kapton Jing Guo step 1 Treated Kapton, described graphite modified dose of viscosity is 30000 ~ 48000CP；
The graphite modified dose of component by following parts by weight forms：
28.5 parts of pyromellitic acid anhydride,
12.5 parts of benzophenone tetracarboxylic dianhydride,
26 parts of diaminodiphenylmethane,
22 parts of dimethylformamide,
8.5 parts of N-Methyl pyrrolidone,
1.5 parts of ethylene glycol,
2 parts of dimethyl silicone polymer；
Step 3: rising to 800 DEG C with the speed of 4 ~ 6 degree/min, kept for 0.9 ~ 1.1 hour；Again with the speed of 9 ~ 11 degree/min Degree rises to 1200 DEG C, 0.9 ~ 1.1 hour postcooling is preserved, so as to obtain the carbonized film of pre-burned；
Step 4: roll the carbonized film of the pre-burned of the step 4 using calender；
Step 5: rising to 2400 DEG C with the speed of 19 ~ 21 degree/min, kept for 0.9 ~ 1.1 hour, then with 19 ~ 21 degree/min Speed rise to 2900 DEG C, 1.8 ~ 2.2 hours postcoolings are kept, so as to obtain the graphite film of main firing；
Step 6: then the graphite film of the main firing obtained by step 5 is rolled to obtain the graphite linings.
Further improved scheme is as follows in above-mentioned technical proposal：
In said program, Kapton is risen to 250 DEG C with 4 ~ 6 degree/min speed from room temperature in the step 1, It is kept for 0.9 ~ 1.1 hour, then with 2.5 ~ 3.5 degree/min, rises to 400 DEG C, near room temperature after being kept for 1 hour.
Since above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art：
1st, stretch-proof graphite of the present invention dissipates pad pasting, in structure graphite linings by upper and lower surface be coated with one layer it is graphite modified The Kapton of agent is prepared, and improves in heat conductivility both vertically and horizontally, avoids adhesive tape part mistake Heat realizes the uniformity of adhesive tape heat conductivility；Secondly, be located at Kapton surface graphite modified dose is contained by specific Benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride, diaminodiphenylmethane, dimethylformamide, the N- crassitudes of amount Ketone, ethylene glycol, dimethyl silicone polymer composition, coated on the pin hole on Kapton, being filled in heating process, are improved Crystallinity simultaneously, also overcome be heat-shrinked it is excessive caused by it is uneven, improve graphite linings biaxial tension performance.
2nd, stretch-proof graphite of the present invention dissipates pad pasting, is located at graphite modified dose of Kapton surface by certain content Benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride, diaminodiphenylmethane, dimethylformamide, N-Methyl pyrrolidone, Ethylene glycol, dimethyl silicone polymer composition reduce azeotropic point and smooth using dimethylformamide, N-Methyl pyrrolidone Boiling point area, improve final products film forming flatness and flexibility；Secondly, Kapton surface has graphite modified Agent improves graphite linings and heat conduction adhesive layer heat conductivility in two-sided pad pasting, and rolls the carbon of the pre-burned using calender Change film, avoid fold and the volume contraction being graphitized in sintering process, improve compactness and crystallinity, further improve In heat conductivility both vertically and horizontally.
3rd, stretch-proof graphite of the present invention dissipates pad pasting, after Kapton first is risen to 400 DEG C of imidizations, then pre-burned Increase calendaring processes between carbonized film and graphitization and roll again after re-forming heat conduction graphite patch, avoid fold and The volume contraction being graphitized in sintering process, improves compactness and crystallinity, further improves in vertical direction and level The heat conductivility in direction.
Specific embodiment
With reference to embodiment, the invention will be further described：
Embodiment：A kind of stretch-proof graphite dissipates pad pasting, and the graphite dissipates attachment film in heat generating components surface, the graphite It dissipates pad pasting and includes graphite linings, positioned at the heat conduction adhesive layer of graphite layer surface and separated type material layer, this separated type material layer, which fits in, leads The hot glue adhesion coating surface opposite with graphite linings；The graphite linings are obtained by following process, this process includes following Step：
Step 1: Kapton is risen to 250 DEG C from room temperature with 4 ~ 6 degree/min speed, kept for 0.9 ~ 1.1 hour, Then with 2.5 ~ 3.5 degree/min, 400 DEG C are risen to, near room temperature after being kept for 1 hour；
Step 2: one layer of graphite modified dose of acquisition is coated on the upper and lower surface of the Kapton Jing Guo step 1 Treated Kapton, the graphite modified dose of component by following parts by weight form：
28.5 parts of pyromellitic acid anhydride,
12.5 parts of benzophenone tetracarboxylic dianhydride,
26 parts of diaminodiphenylmethane,
22 parts of dimethylformamide,
8.5 parts of N-Methyl pyrrolidone,
1.5 parts of ethylene glycol,
2 parts of dimethyl silicone polymer；
Note：Graphite modified dose of viscosity of embodiment 1 is 32000CP, and graphite modified dose of viscosity of embodiment 2 is 35000CP, graphite modified dose of viscosity of embodiment 3 is 38000CP, and graphite modified dose of viscosity of embodiment 4 is 42000CP, graphite modified dose of viscosity of embodiment 5 is 45000CP.
Step 3: rising to 800 DEG C with the speed of 4 ~ 6 degree/min, kept for 0.9 ~ 1.1 hour；Again with the speed of 9 ~ 11 degree/min Degree rises to 1200 DEG C, 0.9 ~ 1.1 hour postcooling is preserved, so as to obtain the carbonized film of pre-burned；
Step 4: roll the carbonized film of the pre-burned of the step 4 using calender；
Step 5: rising to 2400 DEG C with the speed of 19 ~ 21 degree/min, kept for 0.9 ~ 1.1 hour, then with 19 ~ 21 degree/min Speed rise to 2900 DEG C, 1.8 ~ 2.2 hours postcoolings are kept, so as to obtain the graphite film of main firing；
Step 6: then the graphite film of the main firing obtained by step 5 is rolled to obtain the graphite linings 6.
When dissipating pad pasting using above-mentioned stretch-proof graphite, graphite linings are coated with one layer of graphite by upper and lower surface and change in structure Property agent Kapton be prepared, improve in heat conductivility both vertically and horizontally, avoid adhesive tape local Overheat realizes the uniformity of adhesive tape heat conductivility；Secondly, it is located at graphite modified dose of Kapton surface by specific Benzophenone tetracarboxylic dianhydride, pyromellitic acid anhydride, diaminodiphenylmethane, dimethylformamide, the N- methylpyrroles of content Alkanone, ethylene glycol, dimethyl silicone polymer composition, coated on the pin hole on Kapton, being filled in heating process, carry High crystallinity simultaneously, also overcome be heat-shrinked it is excessive caused by it is uneven, improve graphite linings biaxial tension performance, also reduce Azeotropic point and smooth boiling point area improve the flatness and flexibility of final products film forming；Again, Kapton Surface has graphite modified dose, improves graphite linings and heat conduction adhesive layer heat conductivility in two-sided pad pasting, and first by polyimides Increase calendaring processes after film rises to 400 DEG C of imidizations, then between the carbonized film and graphitization of pre-burned and re-form heat conduction Roll again after graphite patch, avoid fold and the volume contraction being graphitized in sintering process, improve compactness and crystallization Degree, further improves in heat conductivility both vertically and horizontally.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention The equivalent change or modification that Spirit Essence is made, should be covered by the protection scope of the present invention.

Claims (2)

1. a kind of stretch-proof graphite dissipates pad pasting, the graphite dissipates attachment film in heat generating components surface, and the graphite dissipates pad pasting packet Include graphite linings, positioned at the heat conduction adhesive layer of graphite layer surface and separated type material layer, this separated type material layer fits in heat conduction adhesive layer The surface opposite with graphite linings；It is characterized in that：The graphite linings are obtained by following process, this process include with Lower step：
Step 1: Kapton is risen to 250 DEG C from room temperature, then with 2.5 ~ 3.5 degree/min, it is down to after rising to 400 DEG C Room temperature；
It is handled Step 2: being coated with one layer graphite modified dose on the upper and lower surface of the Kapton Jing Guo step 1 Kapton afterwards, described graphite modified dose of viscosity is 30000 ~ 48000cP；
The graphite modified dose of component by following parts by weight forms：
28.5 parts of pyromellitic acid anhydride,
12.5 parts of benzophenone tetracarboxylic dianhydride,
26 parts of diaminodiphenylmethane,
22 parts of dimethylformamide,
8.5 parts of N-Methyl pyrrolidone,
1.5 parts of ethylene glycol,
2 parts of dimethyl silicone polymer；
Step 3: rising to 800 DEG C with the speed of 4 ~ 6 degree/min, kept for 0.9 ~ 1.1 hour；Again with the speed liter of 9 ~ 11 degree/min To 1200 DEG C, 0.9 ~ 1.1 hour postcooling is kept, so as to obtain the carbonized film of pre-burned；
Step 4: roll the carbonized film of the pre-burned of the step 3 using calender；
Step 5: rising to 2400 DEG C with the speed of 19 ~ 21 degree/min, kept for 0.9 ~ 1.1 hour, then the speed with 19 ~ 21 degree/min Degree rises to 2900 DEG C, 1.8 ~ 2.2 hours postcoolings is kept, so as to obtain the graphite film of main firing；
Step 6: then the graphite film of the main firing obtained by step 5 is rolled to obtain the graphite linings.
2. stretch-proof graphite according to claim 1 dissipates pad pasting, it is characterised in that：It is in the step 1 that polyimides is thin Film rises to 250 DEG C with 4 ~ 6 degree/min speed from room temperature, is kept for 0.9 ~ 1.1 hour, then with 2.5 ~ 3.5 degree/min, rises to 400 DEG C, it is down to room temperature after being kept for 1 hour.
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CN201610116970.7A Pending CN106118519A (en) 2014-01-26 2014-01-26 The pressure-sensitive pad pasting of microelectronic component
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CN201410036328.9A Active CN103756588B (en) 2014-01-26 2014-01-26 For the Pressuresensitive Tape of microelectronic device
CN201610116967.5A Active CN106118517B (en) 2014-01-26 2014-01-26 The thermally conductive pad pasting of high compactness
CN201610119322.7A Active CN106393842B (en) 2014-01-26 2014-01-26 Stretch-proof graphite dissipates pad pasting
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CN201610116970.7A Pending CN106118519A (en) 2014-01-26 2014-01-26 The pressure-sensitive pad pasting of microelectronic component
CN201610116966.0A Pending CN106433500A (en) 2014-01-26 2014-01-26 Pressure-sensitive adhesive tape for electronic products
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CN107266076A (en) * 2017-07-12 2017-10-20 合肥东恒锐电子科技有限公司 A kind of manufacturing process of the heat conduction pad pasting of mobile phone

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