Skip to content

Metal core PCB – aluminum cooper iron – what makes it more significant


Any electronic system’s primary building block is a printed circuit board. PCBs are used in everything from household appliances to tiny, miniature electronic gadgets. In this age of twenty first century one cannot make an effective electronic device without using PCB. The medical equipment makes use of PCB and because of this the speed and accuracy is increasing day by day. Telecommunications industry also makes their communication devices with the help of PCB which is essential in contemporary applications。

PCB circuit board products currently on the market, from the material categories are divided into three main: ordinary substrates, metal substrates and ceramic substrates.Articles on ceramic PCB and PCB made of other materials can be found and read in our website.Next, this article goes into great detail about metal core PCB.

What is a metal core PCB?

What-is-a-metal-core-PCBAll of these definitions apply to the same kind of PCB, despite seeming different; it has the same technological characteristics and benefits. Metal core PCB is essential for modern technologies. Metal core PCB primarily provide enhanced heat dissipation.Compared with FR4 PCB, metal core PCB provides up to ten times more thermal conductivity than FR-4 PCB and up to ten times less thickness than conventional layouts. Due to the excellent thermal energy transmission, metal PCBs can employ a very thin copper layer, which reduces costs and solution thickness.

Device failure occurs as a result of heat buildup, which is a problem with the devices. Traditional fans are insufficient to keep the gadget cool. The problem can be solved by conducting cooling through a metal core PCB. Heat is transferred from the hotter to the colder area by direct contact.

What’s the type of metal core PCB ?

There are three main types of metal substrates: aluminum substrate, copper substrate, iron substrate. Iron substrate is rarely used in the market, here the focus of analysis is the aluminum substrate, copper substrate.

Aluminum substrate is a unique metal-based copper laminate, with good thermal conductivity, electrical insulation properties and mechanical processing properties. Aluminum substrate is currently the most used substrate in the metal substrate, aluminum substrate has 10 times higher thermal conductivity than the epoxy resin substrate. Aluminum substrate is divided into flexible aluminum substrate, mixed aluminum aluminum substrate, multi-layer aluminum substrate, through-hole aluminum substrate, etc.
How-many-types-metal-core-PCB-is-thereCopper substrate is the most expensive metal substrate, thermal conductivity than aluminum substrate and iron substrate are many times better, the circuit layer requires a large current-carrying capacity, which should use a thicker copper foil, the thickness is generally 35μm ~ 280μm; copper substrate is divided into gold-plated copper substrate, silver-plated copper substrate, tinned copper substrate, antioxidant copper substrate, etc..Construction of metal core PCB.

This technology, which was first developed in the early 1960s for high power applications, is still very useful today. The metal core PCB’s structure is straightforward. The top layer is a thin copper sheet, onto which, similarly to conventional printed circuit boards, traces will be carved. This layer is thicker than the typical range of 1 to 4 ounces for this layer. The innermost layer is depicted as the dielectric material, which serves to electrically isolate the metal plate from the copper film while allowing rapid heat transmission between the two layers.

The above is classified according to the material, the following will be classified according to the structure. Here are detailed explanations of the primary board kinds.
● Single Layer Metal Core PCB
This PCB board is made up of a base layer of metallic sheet and a layer of dielectric sheet with copper conductors. Dielectric is employed in this board for two major purposes. The first is to allow heat transfer between the many components that are positioned at the board, protecting the system from electric shocks.

● Metal Core PCB double sided
There are two sheets of copper metal used in this board. These two sheets are set in one location on the metallic section. To conduct assembly between the layers of the board, it required an additional posture.

● Multilayer metal core PCB
The copper substance utilized in this board is larger than two sheets. The construction of this board becomes more complicated as the amount of layers increases.

Numerous parts, signal layers, and grounds are used in multilayer PCB. In comparison to FR4, the multilayer PCBs require more expertise, labor, and technology to enclose their multiple layers. While laminating such multi-layers is a little pricy, they often perform much better than any other PCB on the market.

What is the structure of metal core PCB ?

What-is-the-structure-of-metal-core-PCBOverall, a simple PCB can be divided into a 3-layer structure: copper layer, Dielectric Layer and metal layer. The exact structure will vary depending on the substrate.

Aluminum PCB:
1.Copper circuit layer
2.Dielectric Layer(Insulated Layer)
3.Substrate(metallayer):4 types of aluminum – 1001,3001,5052,6063

Copper PCB
1.Copper substrate
2.Insulation layer
3. Copper

Iron-based PCBs
Iron is used for the base PCB based PCB material from special steel, silicon steel, etc. FR4 or CEM1 supports that can dissipate heat away from critical board components and into less critical areas such as metal cores or metal heat sink backing.

What are the advantages of metal core board?

What-are-the-advantages-of-metal-core-boardMany electronic products using metal core PCB, is certainly due to its some kind of performance excellent performance. The advantages of metal core PCB are listed below.

● The best benefit is their thermal conductivity. Aside from its ability to conduct electricity, aluminum also benefits from being affordable and recyclable. Compared to other printed circuit boards constructed with FR 4, metal core printed circuit boards transferring the heat Eight to nine times faster.

● The good protection provided by this board for the protection of the elements utilized at this board can be seen if we compare it to FR4 and metal boards.

● It has features that allow the physical dimensions of the board to alter in response to changes in the ambient temperature. This board has a high warm air expansion coefficient. Because it has a lower thermal expansion coefficient than FR4, the board is less likely to be damaged.

● It has the better strength and stability as it is used in the high powered LEDs. Problems about thermal dissipation have been highlighted by the recent and rapid growth of LED technology, particularly with increased power Led bulbs. The circuit may have stability and reliability issues as a result of these LEDs because they are typically positioned directly on the PCB.

Heat dissipation can impair the operation of electronics that use a lot of power if the proper technique is not used. This issue is successfully resolved in these applications by the use of metal PCB. Aluminum adds strength and resistance to the PCB without adding weight, and it also ensures a high level of longevity.

● Metal core PCB has lower weight as compared to the other types and that makes it useful in many applications.

● Metal core PCB offers longer lifespan because aluminum and copper offers greater strength and stability. .com

How to choose between metal core PCB and FR4 PCB?

How-to-choose-between-metal-core-PCB-and-FR4-PCB● Electrical conductivity: Metal core PCB has higher thermal conductivity, typically -1W/mK-7W/mK; FR4 boards have low thermal conductivity, typically -0.3W/mK-0.4W/mK.

● Thickness: Metal core PCB thickness variations are limited depending on available backplane thickness and dielectric sheet thickness; FR4 boards are available in a variety of thicknesses.

● Heat dissipation: Metal core PCB will dissipate heat quickly and eliminate heat transfer through holes; FR4 boards have a lower heat transfer rate and involve through holes for heat transfer.

● Plated through-hole: metal core PCB board PTH is not available in 1-layer PCB, the components are surface-mounted; FR4 circuit boards implement PTH.

● Processes: Metal core PCB involves the same standard processes, except that the v-cutting process includes a diamond-coated saw blade for cutting metal; FR4 boards are standard processes including drilling, milling, v-cutting, and copper sinking.

● Solder Resist: Metal core PCB is white and are only applied to the top layer; FR4 boards come in many colors, such as green, red, blue and black.

● Rigidity: Metal core PCB can withstand shock and vibration and are two to four times stiffer than FR4 or polyimide designs; FR4 boards are less rigid than metal cores.

● Economy: Metal core PCB is more expensive than FR4 circuit board board, FR4 circuit board is cheaper.

● Tags: FR4 circuit board metal core PCB

What is the application of metal core PCB ?

Iron-based copper clad laminates have excellent electrical properties, magnetic permeability, withstand voltage, and high substrate strength, as long as they are used in tape recorders, motors, drivers, etc.

The copper-based copper clad laminate has the basic performance of the aluminum-based copper clad laminate, and its heat dissipation is better. The copper base can carry high-power current and can be used to manufacture high-power circuit PCB such as automotive electronics.

Aluminum-based copper clad laminates have excellent electrical properties, heat dissipation, pressure resistance, bendability, etc. Among metal PCB substrates, aluminum-based PCB copper clad laminates have the largest market volume. Mainly used in automobiles, motorcycles, computers, home appliances, communication electronic products, electronic control, switches, etc.MC-PCB


Finally, because metal core PCB provides the best heat dissipation, they are frequently employed in much electrical equipment. The advantages result in longer device lifespans. These electrical devices are more effective and valuable when they are more durable. Copper and aluminum are the conducting materials utilized in metal core PCB, making them more beneficial. Unlike other PCB varieties, recycling metal core PCB is simple. The metal core PCB is a prominent and essential component of many applications in the present world because of their multiple benefits.

If you are looking for a PCBA companies who can provide one-stop PCB assembly service from PCB design, SMT/DIP assembly, testing, to the package, shipping, please contact us and see what we can do for you.



Product Categories

Most Popular

Contact Us

IBE News

Related Posts


INDUSTRIES WE SERVE Click on each industry to learn more about how we make custom printed circuit board solutions for each market.Our industries served include

Read More »