How Thermally Conductive Graphite Sheets Are Die-cut

    Hot graphite flake classification:

Graphite flakes are divided into natural graphite flakes and artificial graphite flakes!

Natural graphite film has high thermal conductivity, convenient construction, good flexibility, no gas-liquid permeability, graphite sheet does not age and embrittlement, suitable for most chemical media, general thermal conductivity 700 to 1200W/m.k. The disadvantage of natural graphite flakes is that it cannot be too thin. Typically, the thickness of the finished board is as thin as 0.1 mm. Therefore, the market share of natural graphite is getting lower and lower, and at the same time, due to the structural factors of natural graphite, the cooling effect of natural graphite. Relatively weak.

Artificial graphite can be made very thin, the heat dissipation effect is very good, the thermal conductivity is in the range of 1000 to 1500W / m.k, which is mainly reflected in the rapid heat dissipation, but the price of artificial graphite is very high. In the pursuit of quality in the mobile phone market, artificial graphite sheets have also become popular.

Scope of application of hot graphite flake die-cutting process:

Thermally conductive graphite materials bring new technological solutions to the growing industrial heat dissipation needs through a range of different thermal management applications. Thermally conductive graphite material products provide innovative new technologies for thermal management in the electronics industry. Hot graphite provides better thermal conductivity while reducing the weight of the device. Thermally conductive graphite thermal solutions are a new application for thermal design.

Hot graphite surfaces can be combined with metals, plastics, stickers and other materials to meet more design features and needs.

Low thermal resistance: 40% lower thermal resistance than aluminum and 20% lower than copper

Light weight: 25% lighter than aluminum, 75% lighter than copper;

High thermal conductivity: Graphite heat sinks can be smoothly attached to any flat and curved surface, and can be cut in any way according to customer needs.

Die-cutting and forming of hot graphite flakes:

In order to better adapt to the undulating surfaces of electronic devices and circuit modules, it is necessary to carry out certain treatments on hot graphite sheets. The main treatment methods are:

1. Adhesive die-cutting processing: in order to better bond IC and circuit board, adhesive treatment is carried out on the surface of the thermally conductive graphite sheet;

2. Back film die-cutting: In some circuit designs that require insulation or thermal insulation, in order to achieve better functional optimization, the back film treatment is performed on the surface of the graphite sheet.

We can choose the appropriate die-cutting method according to the actual needs of the product.

Application of hot graphite flakes in smartphones:

The CPU speed used by smartphones is constantly increasing, the memory capacity is expanding, and the operating system performance is also improving. The ultra-thin body gradually increases the heat dissipation requirements. At present, smartphones sold in the domestic market increasingly use graphite sheets as thermal conductive materials, such as Apple, Samsung, HTC, Xiaomi, etc