SOLUTION OF ALUMINUM PCB
Aluminum printed circuit boards are also known as metal base PCBs, and are comprised of metal-based laminates covered by copper foil circuit layers. They are made of alloy plates that are a combination of aluminum, magnesium and silumin (Al-Mg-Si)
Aluminum PCB is usually the ideal solution for high tolerance and high power devices.
◈ We have professional quality standard inspectors to ensure that strict quality control measures are taken in each production process.
◈ We have advanced testing technologies, such as AOI testing, electronic testing, X-ray, impedance control, SEM Electron Microscope, Metal surface configuration tester, ROHS Testing, etc.
◈ We are committed to helping you obtain the best quality products and services at competitive prices.
◈ We have a variety of PCB material options, such as FR4, high TG FR4, Rogers PCB, metal based PCB and high-frequency materials, and select the appropriate materials according to customer requirements.
◈ We have an excellent customer service department that supports individual to individual service. If you want to make any updates before the production process starts, our customer service department is very flexible and approachable.
WHAT IS AN ALUMINUM BOARD?
According to the construction and design, aluminum PCBs can be divided into different types.
Aluminum PCBs have many characteristics in same, such as that the main purpose is to provide heat dissipation solutions for the applications involving high temperature.
◈ Why is aluminum a good material for making circuit boards?
ADVANTAGES OF ALUMINUM MANUFACTURING
Aluminum is an ideal choice for heat dissipation of electronic components, which helps reduce any adverse effects that may occur on PCBs.
Aluminum PCB has a variety of good performance, which makes it one of the best PCB types.
The aluminum PCB is better than FR4 based PCB in heat dissipation, it will be ideal choices for the products concerning high pressure and temperature. In addition, the heat generated by electronic equipment usually dissipates rapidly. As a result, the electronic components will face failure and possible damage due to high temperature. But for aluminum board, the situation is completely different, because they effectively solve the heat dissipation problem.
As aluminum PCB effectively solves the heat dissipation problem, the thermal shrinkage and expansion problems of PCB components and various substances can be easily improved. In this way, the reliability, durability of electronic components and the whole machine are stable. In short, aluminum based PCB has done a good job in solving the thermal expansion and contraction problems of surface mount technology, because the heat generated by its electronic components is effectively dissipated.
Aluminum PCB has higher dimensional stability than ordinary PCB insulation components. Therefore, when it is heated from 30 ° C to 140~150 ° C, its size change remains at 2.5~3.0%.
When it comes to manufacturing, handling and everyday using, aluminum based products provide higher strength and durability than other metal materials.
BUILD LAYOUT OF ALUMINUM PCB
The structure or combination of aluminum PCB is composed of four layers, namely:
◈ Copper foil layer
This layer is generally thicker than conventional CCL and is about 1 oz – 10 oz. The thicker copper layer also means that it has greater current carrying capacity.
◈ Dielectric layer
The dielectric layer has conductive parts, and the thickness is generally 50 μ M to 200 μ M or so. The thermal resistance of this layer is relatively low, which is very suitable for its application.
◈ Aluminium base board
This aluminum base board is the third layer - made of aluminum board. Therefore, its thermal conductivity is very high.
◈ Aluminum base film layer
This layer is usually selective - compared to other layers. It helps to protect aluminum surfaces from unnecessary scratching and etching. However, it has two types; One is high temperature resistance, generally around 250 ℃. The other is below 120 degrees.
TYPES OF ALUMINUM PCBS
There are some main types of aluminum PCB, including
Today, most engineers use flexible aluminum PCBs. This is because it has one of the most advanced development achievements of insulating metal substrate. In addition, flexible aluminum PCB has first-class flexibility, electrical insulation and thermal conductivity. These PCBs have solid bending capability. However, you cannot use them for applications that always require frequent bending.
The multilayer Aluminum PCB is typical one in power supply applications with multiple layers of thermally conductive dielectrics. These materials are very useful when they are combined with one or more layer of circuitry in which thermally conductive dielectric is buried between the layers with the help of blind vias which also act as a signal or thermal vias. It's extremely helpful when provide an ideal solution for many applications concerning heat dissipation.
By hot fusing the aluminum substrate to the processed non thermal material, you will obtain a hybrid aluminum PCB. Generally, you can use thermoelectric materials to fuse two or four layers of FR-4 board onto the aluminum board. Finally, the mixed PCB has a heat shield, ruggedness and heat dissipation agent.
The production process of aluminum PCB involves a thin dielectric layer as an electrical insulator. But this insulator is laminated between the metal substrate and the copper foil. Then, the copper foil is etched into a PCB pattern, and the metal base absorbs heat.
CHALLENGES AND SOLUTIONS OF ALUMINUM SUBSTRATE
◈ Copper etching
Aluminum PCBs have copper foil, usually thicker. Therefore, if the copper foil looks more than 3 oz, width compensation for etching is critical.
If the PCB does not meet the design requirements after etching for some reason, the wiring width will exceed the tolerance. Therefore, it is necessary to accurately design the wire width compensation. In addition, it is also important to control the etching process in the production process.
◈ Solder mask printing
The solder mask printing difficulty of aluminum PCB is usually due to the thick copper foil. This problem occurs because of the thickness of trace copper. Therefore, the copper thickness of the wiring will also cause image etching - which will result in a large difference between the bottom board and the wiring surface.
When this happens, solder mask printing becomes difficult. Therefore, it is very important to use secondary solder mask printing. In addition, it is also important to use high quality solder resist in this process. Or you can fill the resin before soldering the mask.
◈ Machinery manufacturing
In the process of mechanical manufacturing, you may encounter processes such as forming, V-notch, mechanical drilling, etc. These processes are usually on internal vias. As a result, it leads to a reduction in electrical strength.
Therefore, it is better to use professional milling cutter and electric milling for small batch products. In addition, it is also an ideal choice for adjusting drilling parameters to avoid burrs. In addition, it will help your machine manufacturing.
APPLICATIONS OF ALUMINUM PCBS
You can use aluminum PCB in the following aspects：
◈ Telecommunications, including high-frequency amplifiers and filtering appliances.
Power Supply, such as switching regulators and DC/AC converters
◈ Automotive, including electronic regulators, lighting and power controllers.
◈ Computers, such as CPU boards, floppy drives and power devices.
◈ Power Modules, including converters, solid-state relays, power rectifiers, and bridges.
◈ Audio Devices, such as input and output amplifiers and power amplifiers.
◈ Office Automation, such as electric motors and drives
◈ Consumer: Street lighting, Traffic control lighting, Interior building lights, Landscape lighting, and Camping gear.
◈ Medical: Operating room lighting, Surgical lighting tools, High power scanning technology, and Power converters.
WHY CHOOSE US AS YOUR ALUMINUM PCB MANUFACTURER?
Camtech PCB has been engaged in the business of producing high-quality aluminum PCB for many years. Therefore, you can rely on our experience to provide first-class custom designed aluminum PCB to meet all your requirements. We can also process your order effectively at a price unmatched in the market. Please feel free to contact us for a free online quote and we can get started.
◈ Hot questions
1. What should be considered in the production of aluminum circuit boards?
Then, you need to consider aluminum design/circuit design and aluminum board. More important is the substrate, including insulating metal substrate and aluminum alloy substrate.
Then there are layers of circuit, such as aluminum base layer, insulating layer, aluminum film layer and conductive layer. In addition, physical properties are also important factors of aluminum PCB, such as thermal performance, thermal efficiency, operating temperature, etc.
In addition, your requirements for aluminum PCB applications are also important. Whether it is large-scale application, high-frequency aluminum PCB or LED application, radiator will have an impact on aluminum PCB.
In addition, pay attention to the conductive medium of aluminum plate, the basic structure and important components of aluminum core PCB. In addition, the manufacturing cost of the printed circuit board.
◈ Our certification
Here are the certificates we have:
IATF 16949:2016 ISO 9001:2015 ISO14001:2015 ISO13485:2016 UL In addition, all our products comply with IPC and ROHS standards. More importantly, we are always committed to manufacturing high-end PCB products.