Thermally conductive composite sheet for thermocompression bonding and manufacturing method thereof
A technology of composite sheets and manufacturing methods, applied in the direction of chemical instruments and methods, lamination, lamination devices, etc., can solve the problems of poor durability, poor productivity, and non-repeatable use, and achieve excellent durability and excellent handling Effect
Active Publication Date: 2022-04-29
SHIN ETSU CHEM IND CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, if the silicone rubber composition is laminated on only one side and heat-cured, since the thermal shrinkage rate of the glass cloth and the film is smaller than that of the silicone, there is a possibility that the silicone rubber will be strongly curled on the inside, and the handling property will be deteriorated. very poor disadvantage
In addition, when the silicone rubber composition is laminated on both sides of the glass cloth or the film and cured by heat, the curling is suppressed, but the production process is prolonged and the productivity is poor compared to lamination on only one side.
[0007] On the other hand, if a heat-resistant resin film such as polytetrafluoroethylene (PTFE) or aromatic polyimide that is resistant to deformation in the tensile direction is used alone, it will not completely absorb heat from the pressure during pressure bonding. Due to the pressure applied to the tool, parts that cannot be crimped uniformly, collide with the object to be crimped before crimping, or the position is shifted, so the crimping may be staggered from the target position
In addition, if the resin film is used alone, traces will remain on the film after crimping, and the same part cannot be used repeatedly
Although the membrane itself is not broken, it is positioned as having poor durability
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0105] 2.0 parts by mass of C-19A (platinum-based catalyst, manufactured by Shin-Etsu Chemical Co., Ltd.), C-8 (peroxide paste, Shin-Etsu Chemical Co., Ltd.) 1.0 parts by mass of Composition 1A. Moreover, the composition 1B which added 4.0 mass parts of C-19B (organohydrogensiloxane) (made by Shin-Etsu Chemical Co., Ltd.) as a vulcanizing agent to compounding material A was obtained.
[0106] Composition 1 was obtained by uniformly kneading the obtained compositions 1A and 1B using twin rolls. Composition 1 was placed on a 1,000 mm wide plasma surface-treated polyimide film (25 μm thick, tensile elastic modulus 5.8 GPa product) as a substrate, directly on the polyimide film using a calender roll forming machine. The film was adjusted and laminated so that the thickness of the entire sheet became 150 μm. The line speed was set at 2.0 m / min., and the set temperature of the vulcanization line was set at a maximum of 150° C. to obtain a composite sheet 1 .
[0107] Hereafter, t...
Embodiment 2
[0109] Polyimide film: 38μm thick, tensile elastic modulus 5.8GPa product
[0110] Overall sheet thickness: 150 μm (same as Example 1)
Embodiment 3
[0112] Polyimide film: 25μm thick, tensile elastic modulus 4.4GPa product
[0113] Overall sheet thickness: 150 μm (same as Example 1)
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Abstract
The present invention provides a thermally conductive composite sheet for thermocompression bonding and a method for producing the same. The thermally conductive silicone rubber composite sheet for thermocompression bonding can suppress curling even if a silicone rubber composition is laminated on only one side of a heat-resistant resin film. It is very small and has excellent handleability, and it is very hard to break even if the same part is repeatedly crimped, and it has durability. The thermally conductive composite sheet for thermocompression bonding is a thermally conductive composite sheet for thermocompression bonding in which a silicone rubber layer composed of a cured product of a silicone rubber composition is laminated on one side of a heat-resistant resin film, wherein the composite The thickness of the whole sheet of the sheet is 100-400 μm, the thickness ratio represented by the silicone rubber layer / heat-resistant resin film is 2-10, the thickness of the above-mentioned heat-resistant resin film is 20-50 μm, and the above-mentioned heat resistance The tensile modulus of the resin film based on the ASTM D-882 measurement method is 4 to 20 GPa.
Description
technical field [0001] The present invention relates to a thermally conductive composite sheet for thermocompression bonding, and more particularly, to an anisotropic conductive film used as a sheet for thermocompression bonding when forming a laminate or a flexible substrate, or for connecting electrodes of a liquid crystal display or the like A thermally conductive thermally conductive composite sheet for thermocompression bonding suitable for a thermocompression bonding sheet and a method for producing the same. Background technique [0002] Heat pressing with a pressure bonding machine for anisotropic conductive film used as a sheet when forming a laminated board or a flexible printed circuit board with a compression molding machine, and for connecting a flexible printed circuit board on which an electrode terminal portion of a liquid crystal display and a driving circuit are mounted A heat conductive sheet is used for the sheet at the time of connection. Recently, the ...
Claims
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IPC IPC(8): B32B25/14B32B25/08B32B27/28C08L83/07C08L83/05C08K3/36C08K3/22C08K3/04C08K3/02
CPCC08L83/04B32B25/08B32B25/14B32B27/281C08K2003/023C08K2003/2241C08K2003/222C08K2003/2227C08K2003/2296C08L2205/025C08K3/36C08K3/22C08K3/04C08K3/02B32B7/02B29C43/24B32B25/20B32B25/02B32B37/24B32B2038/0076B32B2307/306B32B2307/302B32B2307/54
Inventor 宇野贵雄米山勉
Owner SHIN ETSU CHEM IND CO LTD