Aluminum Drilling Entry Sheet for PCB

1. Aluminum Drilling Entry Sheet for PCB Abstract: Aluminum drilling entry sheet is of excellent heat dissipation,thermal expansion and dimensional stability,which is widely used for making printed circuit board. Compared with copper substrate, what are its advantages? Welcome to read this page. Copper Substrate V Aluminum Drilling Entry Sheet Both the aluminum substrate and the copper substrate are of excellent heat dissipation performance when used for making PCB entry sheets. But due to the difference in the nature of the two metals, the performance of the aluminum substrate and the copper substrate is different under the same conditions, and the thermal conductivity of the copper substrate is higher than aluminum drilling entry

2. sheet. Thermal conductivity difference between copper substrate and aluminum substrate: Copper substrate: about 400 W / M.K Aluminum entry board: 200 W / M.K The difference of copper substrate and aluminum entry sheet in processability: 1. The metal base can get a fine pattern by etching the circuit. Copper substrate can be processed into a convex shape, and the components can be directly pasted on the convex surface, realizing heat dissipation effect. 2. Due to the PCB processing technology itself, metallization cannot be directly realized on the aluminum base surface (such as a single aluminum substrate), and the copper base can be processed into metallized holes, so that the corresponding single panel or multi-layer copper substrate has excellent grounding performance. Since copper itself can be welded, so that the final installation of the designed structural parts can be welded,which has better heat dissipation. 3. Due to the difference in the elastic modulus of copper and aluminum (the elastic modulus of copper is about 121000MPa, the elastic modulus of aluminum is 72000MPa), the corresponding warpage and expansion and contraction of the copper substrate will be smaller than that of the aluminum substrate, and the overall performance is more stable. With the increasing density of PCB electronic components and the density of integrated circuits, the speed of signal transmission is accelerating. The corresponding power consumption also increases accordingly. In the future era led by 5G networks, radio frequency signals require excellent grounding performance, and heat dissipation requirements will also be greatly improved. The performance of ordinary rigid PCB boards will not meet their requirements. The demand for aluminum drilling entry board and copper substrates will be larger. Although copper substrate has better performance, aluminum PCB sheet is more easily accepted by the public and has broader application prospect in terms of processing cost.

3. Why Aluminium PCB Sheet Is So Popular Aluminum PCB sheet is made up of metal substrate, insulating dielectric layer and circuit copper layer. The metal substrate is usually aluminum or aluminum alloy sheet; the insulating medium layer is usually modified epoxy resin, polyphenylene oxide (PPO), polyphthalimide (PI), etc.; and the circuit layer of the aluminum substrate is a copper layer. Aluminum drilling sheet is widely used as the base plate of PCB board. Compared with other conventional circuit boards, aluminum drilling entry sheet features great heat dissipation, electromagnetic shielding, thermal expansion, and dimensional stability. Heat Dissipation Conventional PCB circuit board substrates such as FR4, CEN3, etc. are thermally poor conductors, and the heat cannot be dissipated. If the internal heating of various electronic devices cannot be ruled out, it will result in high-speed failure of electronic components. Aluminum PCB sheet can effectively solve this problem. Therefore, the fans in the equipment are removed and the size of the equipment will be greatly reduced. Thermal Expansion Thermal expansion and contraction are the common nature of materials, and different materials have different coefficients of thermal expansion (CTE). Since PCB is a composite board, it faces to the crack caused by the different CTE if the heat can not be eliminated in time. Aluminum drilling entry sheet can effectively solve the problem of heat dissipation, thereby alleviating the problem of thermal expansion and contraction of different substances on the circuit board, and improving the durability and reliability of the entire machine and electronic equipment. Dimensional Stability The size of aluminum PCB entry sheets changes with temperature is much more stable than that of insulating material. When the aluminum sheet is heated from 30℃ to 140-150℃, the dimensional change is 2.5% to 3.0%. In addition, with less area used, aluminum PCB sheets also will save you a lot of production cost and labor. Haomei Aluminum has rich specifications of aluminum sheet for PCB drilling, contact us for today price.

4. The Uses of Aluminium Entry Board for PCB PCB sheet refers to printed circuit board. Aluminum PCB sheet is one of the PCB sheets. It is a aluminum base plate coated with copper layer. Generally, the aluminum PCB sheet is of a three-layer structure, which is a circuit layer (copper foil), an insulating layer, and a metal base layer. In addition to those superior properties such as heat dissipation, dimension stability and thermal expansion, aluminum drilling entry sheet is of excellent mechanical processing performance, which can replace fragile ceramic circuit board. The aluminum entry board can reduce the installation of radiators,thus reducing the size of the product and saving hardware and assembly cost. At the same time, it helps to improve the heat resistance and physical properties of PCB board and reduce production cost and labor. It is because of the excellent properties of Alu sheet for PCB that the aluminum sheet is widely used in the electronics field:  Power amplifier audio equipment  Switching regulator power supply equipment  High-frequency report circuit communication electronic equipment  Motor driver automation equipment  Automotive power supply control device  Solid relay power module

5.  Single led aluminum PCB sheet. Because of simple processing, low production cost and good heat dissipation,it is widely used in LED lighting electronic products. Haomei has comprehensive range of Alu sheet for PCB, welcome to contact us for more information.