WHAT IS aluminium circuit board?

An aluminium circuit board is a type of printed circuit board (PCB) that uses a thin layer of aluminium as the base material instead of the traditional fiberglass or plastic.

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Email is : mcpcb@andwinmcpcb.com

What Is aluminium circuit board?

The aluminium layer provides a number of advantages over other materials, including better heat dissipation, improved electrical conductivity, and greater mechanical strength.

Aluminium circuit boards are commonly used in high-power applications such as LED lighting, power supplies, and motor controllers,
where heat dissipation is a critical factor. They are also used in applications where weight reduction is important, such as aerospace and automotive industries.

Types of aluminium circuit board

  1. Standard Aluminum Substrate:
    This is the most commonly used type of aluminum substrate, which has a thickness of 1.6 mm and a thermal conductivity of 1.0-1.5 W/mK.
  2. High Thermal Conductivity Aluminum Substrate:
    This type of substrate has a higher thermal conductivity of 2.0-3.0 W/mK, making it suitable for high-power applications.
  3. Ultra-Thin Aluminum Substrate:
    This substrate has a thickness of 0.5-1.0 mm, making it ideal for applications where space is limited.
  4. Copper-Clad Aluminum Substrate:
    This substrate has a layer of copper on one or both sides, providing better electrical conductivity and heat dissipation.
  5. Ceramic-Clad Aluminum Substrate:
    This substrate has a layer of ceramic on top of the aluminum substrate, providing better insulation and thermal management.
  6. Flexible Aluminum Substrate:
    This substrate is flexible and can be bent or shaped to fit into tight spaces, making it ideal for applications where flexibility is required.

How is the aluminum circuit board formed?

The process of forming an aluminium circuit board involves several steps:

  1. Preparing the base material:
    A thin layer of aluminium is first cleaned and prepared for the circuit board.
  2. Applying a layer of insulation:
    A layer of dielectric material is applied to the surface of the aluminium layer to insulate it from the conductive traces that will be added later.
  3. Adding the conductive traces:
    A layer of conductive material, such as copper, is added to the surface of the dielectric layer in the desired pattern to create the circuit traces.
  4. Etching:
    The excess copper is then etched away, leaving only the desired circuit traces.
  5. Drilling:
    Holes are drilled through the board where components will be mounted.
  6. Plating:
    A layer of metal, such as gold or tin, is plated onto the exposed copper traces to protect them from oxidation and to improve their conductivity.
  7. Solder mask:
    A layer of solder mask is applied to cover the copper traces and protect them from damage during assembly.
  8. Silk screen:
    A silk screen layer is added to label the components and provide other important information.

The final result is an aluminium circuit board that is ready to be populated with electronic components and used in a variety of applications.

Multilayer metal core pcb

Multilayer MCPCB could layout more circuit, the MCPCB smaller much.

Aluminum circuit boards are used in various electronic devices such as LED lights, power supplies, audio amplifiers, and computer components.

They are also used in industries such as aerospace and automotive for their high thermal conductivity and durability.

Applications Of aluminium circuit board

The technology of the metal core PCB is ideal for its applications that generate immense heat and have difficulty being cool down using conventional fans or other cooling methods.

MCPCBs play an integral role to achieve a high illumination with fewer requirements than LEDs require.
The fabrication process of metal core PCB is helpful for the applications
Since the MCPCBs are most often used in LED technologies for producing a certain illumination the light-emitting diodes releases the heat in applications like:

– General lighting
– Automotive systems
– Industrial, telecom, power supplies, and high voltage regulators types of power converters
– Photovoltaic
– Street safety lightings and streetlights
– Backlight applications

Military and aerospace are another two other sectors appropriate to utilize the benefits of metal core PCBs in their applications.

These sectors are quite sensitive and need to endure frequent thermal cycling, limits of temperature and humidity, along with repeated mechanical shocks.

The MCPCB deals according to the operational requirements only if better structural veracity and thermal conductivity enabling withstanding greater shocks.

The higher the conductivity of thermal, the better it is for the temperature distribution throughout the boards as it ensures a uniform for thermal cycling.

It also stops forming hot spots before near to the active components.
Other than these, MCPCB works great in solar panels and motion control applications.

The combination of a metal core with HDI PCB technology can create an advanced circuit technology including microwave RF PCB, flex PCB, and rigid-flex PCBs.

As the demand for PCBs is high due to the remarkable benefits, the metal core PCB is the most widely used one among all the others.

It ensures high circuitry density, thermal management, and enhanced reliability for enhanced performance.

Thermal conductivity of 2 Layers thermal Pad MPCB

Thermal pad area is 385 W/m.k

Capability of Metal core PCB

Metal core PCB Capability
ItemTechnical specification
Board thicknessMaximum (mm)3.05.0
Panel sizeMaximum (mm)600×1170/
Layer countAluminum PCB1-8L10 L
Copper PCB1-8L10 L
Iron PCB1/
ceramics PCB1-2/
Thermal ConductivityAluminum PCB(w/m.k)0.8 to 12
Copper PCB(w/m.k)2.0-378/
ceramics PCB(w/m.k)24
DrillingMinimum drill diameter (mm)1.00.8
2 Layer ALPCB Via0.3/
MaterialChao Shun(CCAF)(China)Yes/
Hua Dian(China)Yes/
Chin Shi(TaiWan)Yes/
ITEQ(Tai Wan)Yes/
Other brand per customerYes/
Final finishingHASL Lead FreeYes/
Immersion SilverYes/
Immersion Tin/YES

2 Layers direct thermal path copper core pcb application

2 Layers direct thermal path copper core pcb are designed to dissipate heat generated by high-power LEDs,
which helps to increase the lifespan of the LED and improve its performance.
The aluminium base acts as a heat sink, which absorbs and dissipates the heat generated by the LED.

The 2 Layers direct thermal path copper core pcb is made by laminating a thin layer of copper onto an copper substrate.
The copper layer is then etched to create the circuit pattern.
2 Layers direct thermal path copper core pcb for LED lighting applications are available in various sizes and thicknesses, depending on the specific requirements of the application.
They are also available in single-sided, double-sided, and multi-layered configurations.

About Andwin MCPCB

Andwin Ciurcuits MCPCB davision  set up on Feb. 2006.
Focus on  providing metal core PCB for customer
In LED field and power supply field.
We can meet all your MCPCB manufacturing needs,
From single-sided Aluminum to 
complex multilayered metal clad substrate PCBs
And from prototype through production.

The following is a list of the services and products 

We offer:
• Metal Core PCB
• Thermal PAD MCPCB
• Aluminum PCB
• Copper based PCB
• Double sided Aluminum PCB

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