A three-layer integrated high-efficiency high-strength heat conduction sheet and its preparation method

Abstract

The invention provides a three-layer integrated high-efficiency and high-strength heat conduction sheet and a manufacturing method thereof. The three-layer integrated high-efficiency and high-strength heat conduction sheet of the present invention has simple and cheap raw materials, reasonable and ingenious structure, and the heat conduction filler is concentrated in the middle heat conduction layer, and the transition fusion between the heat conduction layer and the protective layer is realized, thereby possessing outstanding heat conduction performance and excellent mechanical strength. The preparation method of the three-layer integrated high-efficiency and high-strength thermal conductive sheet described in the present invention combines the composition and process skillfully, and can efficiently produce the three-layer integrated thermal sheet with high mechanical strength and high thermal conductivity under the condition of low cost control. Efficient and high-strength heat conduction sheet.

Description

technical field [0001] The invention belongs to the field of heat-conducting materials, and in particular relates to a three-layer integrated high-efficiency and high-strength heat-conducting sheet and a preparation method thereof. Background technique [0002] With the miniaturization of electronic components and the rapid development of microelectronic integrated circuits, industrial applications have put forward higher requirements for the heat dissipation and performance of electronic packaging materials. Therefore, it is of great significance to develop a thermally conductive sheet with excellent thermal conductivity and mechanical strength. Polymer materials are widely used as the base material of various heat-conducting materials due to their excellent corrosion resistance, electrical insulation, light weight, easy processing and excellent dielectric properties, and a certain proportion of them are added to the polymer materials. Thermally conductive filler to improv...

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Problems solved by technology

However, the addition of thermally conductive fillers will have a certain impact on the mechanical properties of the material, so the addition of thermally conductive fillers is limited

[0003] With the gradual deepening of the research, we found that the heat conduction efficiency of the thermally conductive filler may be higher than that of the uniformly dispersed state. When the filler is evenly dispersed, it is not conducive to the formation of a heat conduction channel by the thermally conductive filler, so the thermal resistance is relatively large

However, in actual use, the centralized arrangement of thermally conductive fillers often fails to achieve satisfactory results. The main reason is that it is difficult to achieve perfect connections between different thermally conductive layers. Conventional connection methods will greatly affect thermal conductivity and mechanical strength. , such as thermocompression connection, adhesive connection, etc., cannot take into account high thermal conductivity and high mechanical strength

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