What is aluminium clad pcb?

An aluminium clad PCB (printed circuit board) is a type of PCB that has a layer of aluminium on the top or bottom of the board.
This layer of aluminium provides a number of benefits, including improved heat dissipation, increased mechanical strength, and improved electromagnetic shielding.

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Email is : mcpcb@andwinmcpcb.com

What Is aluminium clad pcb?

Aluminium clad PCBs are commonly used in high-power applications where heat dissipation is critical, such as in LED lighting, power supplies, and motor control circuits.
The aluminium layer is typically bonded to the PCB using a thermally conductive adhesive, and the circuit traces are etched onto the surface of the board using standard PCB manufacturing techniques.

Types of aluminium clad pcb

  1. Single-sided aluminum clad board:
    This type of board has a layer of aluminum on one side and a layer of copper on the other side. It is commonly used in LED lighting and power supply applications.
  2. Double-sided aluminum clad board:
    This type of board has a layer of aluminum on both sides and a layer of copper in between. It is commonly used in high-power applications where heat dissipation is critical.
  3. Multilayer aluminum clad board:
    This type of board has multiple layers of aluminum and copper, and is used in complex circuits that require high thermal conductivity and electromagnetic shielding.
  4. High-frequency aluminum clad board:
    This type of board is designed for high-frequency circuits and has a special type of aluminum layer that provides improved electromagnetic shielding.
  5. Flexible aluminum clad board:
    This type of board is made of a flexible substrate material, such as polyimide, with a layer of aluminum on one or both sides.
    It is commonly used in applications where flexibility is required, such as in wearable electronics.

The structure of aluminum clad board

Aluminum clad board is a type of printed circuit board (PCB) that has a metal layer (usually aluminum) on one or both sides of the board. The structure of an aluminum clad board typically consists of the following layers:

  1. Base material:
    This layer is usually made of a non-conductive material such as fiberglass or ceramic. It provides the structural support for the board.
  2. Copper layer:
    A thin layer of copper is applied to the base material using a process called electroplating. This layer serves as the conductive layer for the board.
  3. Thermal insulation layer:
    A layer of thermal insulation material is applied to the copper layer to prevent heat from damaging the board.
  4. Aluminum layer:
    A layer of aluminum is applied to the thermal insulation layer using a process called lamination. This layer serves as a heat sink and helps dissipate heat from the board.
  5. Solder mask layer:
    A layer of solder mask is applied to the copper layer to protect it from oxidation and to prevent solder from flowing where it is not intended.
  6. Silkscreen layer:
    A layer of silkscreen is applied to the solder mask layer to provide labeling and identification for the board.

Overall, the structure of an aluminum clad board is designed to provide a durable and reliable platform for electronic components to be mounted and connected.

Multilayer metal core pcb

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

This arrangement is made so that the heat can dissipate through the metal core and transmit to the chassis.

Most of the LED or analog devices are populated with considerably larger boards.
The surface of the boards finishes by dissipating the heat.

While using the MCPCBs, it is obliged to take proper caution because it is constructed with some complex and complicated metal layers laminated with FR4 based on glass material. 

The chemistry for lamination differs while the board is fabricated.
If the board is bonded properly then there might be voids below the lamination and caution is necessary.

The dissipated fixture of heat is anticipated from the metal core which is needed to be defined and designed carefully.

Applications Of aluminium clad pcb

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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