Heat conductive caulking pad with composite structure

Abstract

The invention relates to a thermal conducive joint filling pad, with composite structure. Wherein, its soft thermal conductive layer is formed by mixed high-conductive power particles in certain granularity size and the macromolecule conjugation agent with plastic property; said layer is preset with ventilate channel; when the heating element and the heat emitter are compressed, the air inside the ventilate channel of soft thermal conducive layer between them will be discharged, and the plastic conductor will be filled, to confirm the thermal conducive effect; one or two surfaces of thermal conductive joint filling pad are coated with parting film; when the heating element and the heat emitter are compressed, the distance is reduced until they contact the largest thermal conductive particles, to form one uniform high-density thermal conductive layer.

Description

technical field [0001] The invention relates to a heat conduction gap filling material, in particular to a heat conduction gasket of a composite structure. Background technique [0002] As the chip rate and product power continue to increase, a large amount of heat needs to be discharged through the close contact between the surface of the heating element and the cooling element. However, due to factors such as processing roughness or tolerance, the contact surface of the heating element and the heat sink is not a true plane, and there is actually a certain gap between the two surfaces. The air in the gap is a poor thermal conductor with high thermal resistance, so the gap obviously becomes a place where heat is blocked and accumulated. [0003] There are three methods to solve this problem in the prior art: 1. Use a spatula to smear the heat dissipation paste whose main component is graphite or silica gel (SILICONE); 2. Use screen printing to apply the heat dissipation pas...

AI Technical Summary

Problems solved by technology

However, in practical applications, the above three modes all have the following defects: the thickness of the caulking layer is not uniform after lamination, the film layer is uneven, and defects such as unshaped pores, air blocks or non-contact surfaces remain after lamination

Moreover, these defects are uncontrollable variable factors in mass production, and are the main cause of serious poor heat dissipation efficiency of products.

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