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Metal Core PCB

MCPCB refers to Metal Core PCB (MCPCB), which is a printed circuit board that is attached to another metal with better thermal conductivity, which can improve the heat dissipation at the circuit board level. Aluminum based PCB is one of the most common types, which can provide efficient heat dissipation and cooling of electronic components, thereby improving the overall performance of the product.
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What is Metal Core PCB?


Metal Core PCB (MCPCB) is a special type of printed circuit board, whose substrate is mainly made of metals such as aluminum and copper. The core feature of metal core PCB is the synergistic effect between its metal substrate and dielectric layer, which makes it excellent in thermal management and mechanical strength, especially suitable for applications under high power and high temperature conditions.


Main characteristics of metal core PCB


1) High thermal conductivity


The thermal conductivity of metal core PCB is 6 to 9 times higher than that of traditional FR-4 PCB, which can quickly disperse and manage heat, making it suitable for high-power devices such as LED lighting, automobiles, and medical equipment.


2) Excellent heat dissipation


High temperatures can cause serious damage to electronic devices. Therefore, using materials that are conducive to heat dissipation is the correct choice.


3) High strength and durability


The presence of metal layers enables metal core PCBs to withstand higher pressure and vibration, making them suitable for applications that require high mechanical strength.


4) Dimensional stability and durability


The size of metal substrates is more stable than insulation materials, which can alleviate the thermal expansion and contraction problems between components and improve the durability and reliability of equipment.


AI PCB-2

Process flow of metal core PCB


1. PCB layout: Firstly, organize and inspect the PCB layout. After receiving the CAD files from the PCB design company, the PCB manufacturer's engineers will check whether the PCB layout design meets the factory's manufacturing process requirements, ensure that there are no design defects or other issues, and convert it into a unified format, such as Extended Gerber RS-274X or Gerber X2.


2. Core board production: Clean the copper-clad board, remove dust and stains on the surface to prevent short circuits or open circuits in the later stage of the circuit board. A multi-layer PCB (such as an 8-layer PCB) is made by bonding multiple copper-clad laminates (core boards) and copper films through a semi cured sheet. The production sequence starts from the middle core board, gradually stacking and fixing them.


3. Inner PCB circuit transfer: Cover a layer of photosensitive film on the cleaned surface of the copper-clad laminate. Through the exposure and development process, the required copper foil circuit is fixed under the photosensitive film, and then the unwanted copper foil is etched away to expose the required PCB circuit copper foil.


4. Drilling: According to the design requirements, use a high-precision drilling machine to drill precise through holes on the circuit board, which will be used for electrical connections between different layers. Appropriate drill bit diameter and precise drilling parameters must be used during the drilling process to ensure smooth and burr free borehole walls.


5. Copper plating on hole wall: After drilling, the hole wall is loosened and chemically treated to increase its roughness. Then, copper ions in the electrolyte are uniformly deposited on the hole wall through electrochemical methods to form a thin and uniform copper foil layer, ensuring the conductivity of the hole.


metal core PCB


6. Layering: Press the copper foil, semi cured sheet, and brown treated inner layer circuit board into a multi-layer board. This step is to ensure good electrical connections and mechanical strength between each layer.


7. Outer layer dry film and circuit exposure: Using LDI (Laser Direct Imaging) technology to project the circuit diagram onto the copper coating of the PCB, leaving the desired circuit shape through exposure and development processes.


8. Electroplating: Further increase the thickness of the copper layer on the developed lines and hole walls to ensure their conductivity and mechanical strength. During the electroplating process, surface pretreatment is required, such as degreasing and acid washing.


9. Outer layer circuit: The required circuit is exposed on the dry film through graphic transfer technology and plated to achieve the customer's desired circuit shape.


10. Post process: including screen printing (protective layer of outer circuit), testing, and quality audit to ensure that the final PCB meets design requirements and performance standards.




Aluminum can effectively transfer heat from heating or critical components, minimizing any potential harmful effects on the circuit board. Durability: Aluminum can provide strength, toughness, and durability that glass fiber substrates cannot provide. Aluminum is a relatively hard material that can reduce the risk of accidental damage during production, processing, and daily use. Lightweight: Aluminum enhances the strength and elasticity of the product without adding extra weight.


Construction of metal core PCB


The common aluminum substrate structure is as follows: the surface layer is the wiring layer, the middle layer is the insulation and thermal conductivity layer, which has good thermal conductivity, and the bottom layer is the aluminum base layer.


Circuit layer:

This is the copper foil layer of printed circuits, with a thickness ranging from 1.0 ounce to 8 ounces.


Dielectric layer:

An insulating layer used to isolate circuit layers and metal layers.


Metal layer:

Usually made of metals such as aluminum, copper, or iron, it endows the PCB with high strength and good thermal conductivity.


Metal Core PCB



Application of metal core PCB


Due to its excellent performance, metal core PCBs are widely used in the following fields:


  • LED lighting: used to reduce operating temperature, decrease circuit board size, increase power density, and extend chip life.


  • Automobiles: Used for high-performance electronic control systems and sensors.


  • Medical equipment: Medical electronic devices that require high stability and reliability.


  • Communication equipment: high-frequency circuits and application scenarios with large changes in high and low temperatures.





SysPCB:  Professional Metal Core PCB manufacturer


SysPCB is a Chinese metal core PCB board manufacturer that can help you search for printed circuit boards made of metal cores or any other material. Here are some reasons to select SysPCB as your metal core PCB manufacturer China.


Competitive  Price

We assist you in optimising project budgets without compromising quality or dependability by offering reasonable prices for China metal core PCB fabrication services without minimum order quantity limitations.


One-Stop Service

If you'd like to avoid the hassle and skip some steps, you can opt for our one-stop turnkey service. SysPCB can manage the entire process for you, with clear and transparent workflows that help save you time and effort. Once the order is placed, all you need to do is wait for the delivery of your goods.


Fast Delivery

SysPCB regulates product flow methodically, from direct and indirect material purchase to shipment to the end customer. SysPCB, a metal core PCB supplier, has backup plans in place for unexpected events such as material shortages, machine faults, shipment delays, and plant delays.


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