If you often pay attention to the scavenging evaluation of the laptop, it is not difficult to find that the surface of the internal hardware is covered with a layer, some is a black sticker, and some is a metal piece. So, what are the use? Is it necessary to reveal them?

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

Awfully metal sheet

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

In addition to covering a metal thermally conductive plate or Vc heating plate between the chip and the heat pipe, the power supply module, the film, the hard disk, the wireless network card, and the survival surface can also be seen occasionally. They generally have two effects, one of which is electromagnetic shielding, and its second is auxiliary heat dissipation.

In theory, any electronic device will generate a certain electromagnetic interference on the peripheral device during power-on, and the external electric field, magnetic field or electromagnetic field will also cause interference to internal electronic devices. In order to avoid the above problems, many notebook vendors will put memory, memory, or power supply modules in a closed or approximately closed metal shell or metal mesh cover. In general, there is a certain distance between the shield and the internal chip or circuit, There is no direct contact. It is the legendary “electromagnetic shield” that can also play an anti-static effect when disassembly and maintenance.

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

In order to make the electronic device in the shield “breathable”, many shield surfaces are also covered with holes, which can play a role in air circulation. Please be assured that these small holes do not affect the performance of electromagnetic shields while ventilation.

The heat sink looks similar to the shield, but it does not need to be packaged in the electronic device, just override it. The heat sink is generally located on the SSD, the wireless network card or the South Bridge chip, and its back is usually attached to heat-conductive silicone, and “intimate contact” is “intimate contact” on the surface of the heating chip. Of course, if there is a thermally conductive silicone sheet inside, the shield can also serve the efficacy of the auxiliary heat dissipation. Since silica gel does not conduct electricity, it does not affect its anti-static ability.

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

Mysterious black film

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

In addition to your eye-catching metal sheet, the inside of the notebook can sometimes see a large black sticker or film, and their effect is similar to the metal sheet mentioned above.

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

Among them, if the black film material is hard, the surface is also obvious reflective, which is an electromagnetic shield film to prevent electromagnetic waves from electronic devices on the motherboard to interfere with each other, while also anti-static.

If the material of the sticker is very soft, the surface feels relatively rough, and there is still some sticky hand in the inner layer. It is likely to be the insulated heat-dissipation sticker of the inner graphite element, and the heat-dissipation area of ​​graphite is increased, and there is also electrical conductivity It can play a certain ability to prevent electromagnetic interference and static electricity.

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

This large-area insulating heat purity sticker is generally attached to the surface of the power supply module and other circuits, occasionally can be seen at the gap between the heat dissipation fan and the heat dissipation fins, which can be used to heat and prevent the airway. “Leak” role.

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

Aluminum foil, copper foil is also a frequent visitor within the notebook for assisting heat dissipation. The former is silver white, and the latter is very good for golden yellow. Inconscent between the fan and fins is insulating heat stickers, some products are only ordinary insulating tapes, while the insulating tape is also commonly connected to the connection of the slot, preventing the interface from loose.

散热还是屏蔽优化?笔记本内部那些黑色膜是干啥用的?

In short, the notebook is a very precise electronic device, each of them, every flying line, every sticker and every metal piece have existence and value, and ordinary users don’t want to handle them, generally don’t need you to buy heat dissipation. Slices or insulated heat-fixing stickers are modified.