WHERE WILL THE "HEAT" OF SMARTPHONES GO WHEN 5G ARRIVES?

In the era of 1G and 2G before the popularity of smart phones, mobile phones were less troubled by heat dissipation technology. But with the coming of the 3G intelligent machine, the hardware configuration of mobile phones is getting higher and higher. CPU has been upgrading to multi-core and high performance. The communication rate has been rising, and the continuous demand for the lightening and miniaturization of mobile phones has brought about increasing demand for heat dissipation. There are new thermal conductive materials and radiators such as thermal conductive silicone grease, heat conducting gel, thermal conductive silicone pad, thermal conductive graphite sheet, multilayer pyrolytic graphite foil and heat pipe heat dissipation. For the upcoming 5G high-speed transmission communication, heat dissipation will become the biggest obstacle for smartphones to move forward.

As the leader of producing heat dissipation and thermal conductive materials, DSN specializes in the production of pyrolytic graphite sheet and is committed to providing 5G heat dissipation thermal conductive materials and solutions.

In terms of chip power consumption, 5G is 2.5 times as much as 4G, this means that the thermal conductivity and heat dissipation of mobile phones will be a huge challenge.

High thermal conductivity graphite materials will help 5G smartphones break through the "thermal conductivity and heat dissipation" problem.

Thermal conductive material is used between heat source and radiator contact interface to improve heat conduction efficiency, so as to effectively solve the thermal conductivity and heat dissipation problem of the whole high-power electronic equipment, improve the working stability and service life of electronic products.

Graphite material with high thermal conductivity has unique grain orientation because of its carbon atom structure. It can conduct heat uniformly in both directions. It has excellent plane thermal conductivity, and its thermal conductivity is much higher than that of pure copper. The lamellar structure of graphite crystal can be well adapted to any surface, and has the advantages of low density (lightweight), high specific heat capacity (high temperature resistance), long-term reliability and so on.

In the thermal conductivity and heat dissipation materials of smart phones, pyrolytic graphite material is the preferred material for thermal conductivity and heat dissipation solutions considering comprehensive performance and cost.

As one of the preferred graphite materials supplier, DSN is actively striving to produce artificial graphite sheet, providing thermal conductivity and heat dissipation solutions for many customers.

Main characteristics of synthetic graphite sheet:

Light weight: 1.0-1.9g/cm3 (density equivalent to 1/4 to 1/10 of copper, 1/1.3 to 1/3 of aluminium);

Low thermal resistance: soft and easy to cut (can bend repeatedly);

Ultrathin: thickness (0.025-0.1mm);

Surface can be combined with other materials such as metal, plastic, self-adhesive to meet more design functions and needs.

The thermal conductivity is usually understood as the speed of heat conduction. For radiators, the faster speed the better effect, that is to say, the larger the value, the better effect.

Specific heat capacity reflects that the heat absorbed (or released) is not the same when different substances with the same mass increase (or decrease) the same temperature. The larger the specific heat capacity of substances, the more heat absorbed (or released).

The smaller the density is, the lighter the mass is at the same volume.

Thermal conductivity of various materials (a-b direction)

Diamond

Graphite sheet 25um

Graphite sheet 70um

Graphite sheet 100um

Copper

Aluminum

Magnesium oxide alloy

Stainless steel

Heat conduction sheet

Thermal conductivity W/(m.K)

From the two pictures, it can be seen that pyrolytic graphite sheet has great advantages over traditional heat dissipation materials in face-to-face thermal conductivity. Secondly, the graphite sheet test data show that it has the characteristics of low temperature, small temperature difference, fast speed, short time, rapid cooling, low specific heat capacity and so on.