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Aluminum PCB-an study of a type of PCB


Circuits are the heart of every electronic device. They play a vital role in transmitting signals between various components and devices. Circuits can be either made from plastic or copper. A PCB (printed circuit board) is the most common type of circuit used by electronic devices today. It comprises different layers, each layer having its own specific function within the circuit board.

While there are many different types of materials used in manufacturing PCB, aluminum is one such preferred material due to its lightweight nature and electrical conductivity properties which makes it an ideal choice for electronics manufacturers looking for cost-effective alternatives in their manufacturing process that also provides better performance than other materials available on the market today.This article will introduce some aspects of aluminum PCB.

What is aluminum PCB ?

What-is-aluminum-PCBAluminum PCB is a kind of circuit board made from aluminum. Aluminum PCB is used in many industries and for electrical and electronic applications.

Aluminum PCB is a good conductor of electricity, which makes it ideal for transmitting current. Because of this property, an aluminum PCB can be used in high-power circuits like those found in motors, power supplies and other devices that require large amounts of energy to operate.

Aluminium PCB has excellent electromagnetic shielding properties and can be galvanically isolated from the environment. This makes it suitable for use in sensitive equipment where electrical noise might affect performance or reliability such as industrial control systems or computers connected by networks such as Ethernet networks or wireless connections like Wi-Fi routers.

What’s the type of aluminum PCB ?

What’s the type of aluminum PCB?The type of aluminum PCB is determined by the number of layers on the board. Following are the major types of PCBs:

Flex aluminum PCB

Flex PCBs are a new type of printed circuit board that can flex and bend. These types of PCBs are used in a wide variety of applications, ranging from wearable electronics to industrial machinery.

Hybrid aluminum PCB

In the “hybrid” IMS structure, the non-thermal “subassemblies” are treated independently and then bonded to the aluminum substrate with a thermal material.The most common construction is a 2 or 4 layers subcomponent made of conventional FR-4, which is bonded to an aluminum substrate with a thermo-dielectric to help dissipate heat and improve rigidity.

Multilayer aluminum PCB

Multilayer PCB consists of multiple layers of metals and dielectrics sandwiched together with an insulating adhesive like epoxy. Though they require more complex manufacturing processes, multilayer assemblies offer superior performance and reliability over single-layer boards because they can be manufactured with better high-frequency characteristics and tighter tolerances between traces and pads on each layer.

In the high performance power market, multilayer IMSPCBs are made of multiple layers of thermally conductive dielectric. These structures have one or more layers of circuitry buried in the dielectric, with blind holes used as thermal vias or signal paths.

Through-hole aluminum PCB

In the most complex structures, a single layer of aluminum can form the “core” of a multilayer thermal structure. Prior to lamination, the aluminum is pre-plated and filled with dielectric. Thermal materials or subcomponents can be laminated to both sides of the aluminum using thermally bonded materials. Once laminated, the finished assembly resembles a traditional multilayer aluminum substrate by drilling holes. Plated through-holes are drilled through the gaps in the aluminum to maintain electrical insulation. Alternatively, a copper core may allow direct electrical connections as well as insulated through-holes.

What’s the structure of aluminum PCB?

What’s the structure of aluminum PCBAn aluminum PCB consists of three layers: the top layer is made from copper, the middle layer is made from a dielectric material, and the bottom layer is made from a substrate. Copper is used because it has high conductivity, which allows electricity to flow through it easily. The dielectric material must be placed between the top and bottom layers so that they don’t short-circuit each other.

Why is aluminum used in circuit boards?

Why is aluminum used in circuit boardsWhen it comes to circuit boards, you can’t beat aluminum. This metal has very good conductivity and is easy to machine, which means it can be formed into complex shapes. Aluminum also has a high strength-to-weight ratio, meaning that it is both light and strong. And did we mention that aluminum is one of the most recyclable metals in existence?

In addition, aluminum has the following other advantages which are the reasons why some electronics manufacturers choose aluminum as PCB material.

Heat dissipation: Aluminum is a material that can dissipate heat, and it can transfer heat from vital components, minimizing its harmful effects on circuit boards and electronic devices.
Environmental protection: Aluminum is a non-toxic(meaning no nasty chemicals leaching out), recyclable material. It helps to save energy because it is easy to assemble and does not cause scrap and waste. In short, the use of this metal is very helpful to protect the health of the earth.
Light weight: Aluminum is very light, but it has high strength and flexibility. It is very durable and has a long service life.
Higher Durability: Aluminum is a solid substrate with high strength and durability, unlike ceramic or fiberglass substrates which are fragile. It will not be damaged easily during handling and daily use, and is more durable.
Cheaper price: Aluminum is a common material and it’s inexpensive compared to other metals used in electronics manufacturing.

What’s the application of aluminum PCB ?

What’s the application of aluminum PCBAluminum PCB board is applied to many fields, such as the field of aviation, aerospace and other fields. It is also used in the field of medical equipment. In addition, it can be used in military equipment.

In fact, every electronic device with a compact design requires a PCB board that has high density and is lightweight but durable enough to be able to withstand shocks or vibrations during operation. The aluminum PCB board has all these properties.

● audio equipment: many kinds of amplifiers. Like input and output amplifiers, balanced amplifiers, and so on.
● power supplies: switching regulators, converters and regulators, etc.
● communication electronic equipment: high frequency amplifiers, filtering equipment, transmitting circuits.
● Office automation equipment: motor drives, etc.
● Automotive: electronic regulators, ignition, power controllers, etc.
● Computers: CPU boards, floppy disk drives, power supply devices, etc.
● Power modules: inverters, solid-state relays, rectifier bridges.
● LED industry: colorful energy-saving LED lamps.

How to manufacture aluminum PCB ?

How to manufacture aluminum PCBThe process of manufacturing aluminum PCB involves several steps that may be performed by a number of different machines:

Board cut. Cut the large size of the incoming material into the size required for production.
Drilling. Positioning the board for drilling to provide assistance to the subsequent production process and customer assembly.
Dry/wet film imaging. Renders the required part of the production line on the board.
Acid/Alkaline Etching. After the dry/wet film imaging, the required part of the circuit is retained and the excess part outside the circuit is removed. After the etching is completed, it needs to be de-filmed and dried.
Solder mask and silkscreen. Anti-solder: protect the line that does not need to do soldering, to prevent tin from entering the short circuit caused. Silkscreen: play a role in marking.
The board splitter (v-cut) and routing. V-cut: the single piece of line and the whole board of the board cut to leave a small part connected to facilitate the use of packaging and removal. routing: the excess part of the circuit board will be removed.
Testing. Line test: test the completed line to see if it works properly; Withstand voltage test: test whether the completed line can withstand the specified voltage environment; OSP (organic Solderability Preservatives): let the line can be better soldering.
FQC and FQA. Packaging and shipment. Using FQC to confirm the full inspection of the product, FQA for sampling verification, and then packaged in accordance with the requirements of the customer shipment.


I hope this article has given you a better understanding of what aluminum PCB is and its applications. If you are interested in using aluminum for your design, please contact IBE Electronics for more details.

IBE provides PCB and PCBA manufacturing services that help customers get the products they want, when and how they want them. Our one-stop cost-saving solutions meet tight budgets and strict lead times—no matter what you’re making or where it’s going.

Check out IBE now!



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