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A Flexible Aluminum PCB: What Is It? It Isn’t FPC


Today’s electronic products have become lighter, thinner, and curvier. The demand for flexible aluminum PCBs has increased due to their bendable properties. Flex Aluminum PCBs are specially processed so that could curled, 3D-shaped, or bent. Is a flexible aluminum PCB a flexible PCB? Remember that a flexible aluminum PCB does not belong to a flexible PCB (FPC). FPCs made of polyimide, whereas flexible aluminum PCBs made of metal. Let’s go through the article in detail. to understand the difference between flexible aluminum PCBs and FPCs.

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What is Flexible Aluminum PCB?

Flexible aluminum PCB is a kind of aluminum PCB with good flexibility and thermal conductivity. As we know, the higher the aluminum content in aluminum PCB processing, the softer it is. The material of flexible aluminum PCB is the same as that of ordinary aluminum PCB. Only the copper and glue content inside are different. Flexible aluminum PCBs have physical grooves (countersunk holes) in the aluminum substrate. so they can bend to a certain degree.

Features of Flexible Aluminum PCB

At the moment, the traditional aluminum PCB is an aluminum plate, + adhesive layer, + copper foil. The aluminum foil selection thickness of not more than 0.15 mm. And the thickness of the copper foil does not exceed 0.07 mm. To achieve the effects of flexibility and thermal conductivity, the insulating layer made of polyimide film with an insulation performance of F grade or higher. and the thermal conductive layer made of flexible rubber and conductive materials. such as alumina and boron oxide. Flexible aluminum PCBs can not only withstand 30 kV high voltage tests. but also have a life of up to 600,000 hours at 118 °C, while the insulation.

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Materials of Aluminium Flex PCB

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Aluminum-based Substrate:

The primary component forms the base of the PCB. offering stability, mechanical support, and enhanced thermal conductivity.

Conductive Layers:

Typically made of copper or other materials with high conductivity. forming the pathways for electrical conduction.

Insulating Layers:

These layers used to isolate different sections of conductive pathways. preventing short circuits, and providing insulation for the circuit.

Cover Layer:

A protective layer that shields the circuit from external factors. ensuring the durability and integrity of the Aluminium Flex PCB.

These materials collectively contribute to the unique properties of Aluminium Flex PCB. combining flexibility with the advantages of aluminum. For applications requiring both flexibility and efficient heat dissipation.

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The Difference Between Aluminum Flex PCB and FPC

AspectAluminium Flex PCBFPC (Flexible Printed Circuit)
DefinitionFlexible circuits with aluminum conductors.General term for flexible circuits.
Conductive MaterialAluminum for the conductive traces.Various materials like polyimide or PET.
Base MaterialAluminium substancepolyimide or PET.
FlexibilityFlexible, can be bentFlexible, allows bending to some extent.
Thermal ConductivityHigh thermal conductivity Depends on the material used (e.g., PI).
Specific AdvantageImproved heat dissipation properties.Versatility in various electronic devices.
CostRelatively highGenerally lower
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What is the benefits of Aluminium Flex PCB?

Aluminium Flex PCB has advantages that make it highly favorable for specific applications. Here are some of its main benefits:

FLEX PCB Thermal Considerations

Superior Thermal Conductivity

Aluminum-based material offers excellent thermal conductivity. enabling Aluminium Flex PCB to effectively transfer and dissipate heat. especially in high-temperature environments.

flex PCB test

Mechanical Strength and Stability

The aluminum substrate provides high mechanical strength and structural stability. making Aluminium Flex PCB well-suited for applications with demanding mechanical requirements.

FLEX pcb Material Selection

Effective Electromagnetic Shielding

Aluminum-based material provides a degree of electromagnetic shielding. helping to reduce the impact of electromagnetic interference on the circuit.

fpc Weight Reduction

Lightweight Design

The lightweight nature of aluminum contributes to overall weight reduction. particularly beneficial for weight-sensitive application

FPC for LED Lighting

Corrosion Resistance

Aluminum exhibits good corrosion resistance. enhancing the long-term stability and durability of Aluminium Flex PCB.

High Wiring Density

High-Density Integration

The aluminum substrate allows for higher-density circuit layouts. facilitating more complex and compact circuit designs.

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The Application of Aluminium Flex PCB

A premier flex PCB prototype service provider boasts a rich history and extensive experience. Look for a company with a proven track record. preferably one that has successfully executed a diverse range of projects over an extended period.

led lighting for flexible aluminium PCB


Due to the good thermal conductivity of aluminum. Aluminium Flex PCBs used in LED lighting applications. Their flexibility also allows them to adapt to curved surfaces or complex shapes in lighting designs.

flexible pcb application-Automotive


In the automotive industry, Aluminium Flex PCBs use in vehicle lighting, and dashboards. electric vehicle battery management systems, and other applications. The superior thermal performance of aluminum contributes to efficient heat dissipation. 

flexible pcb application-medical devices

Power Modules

The excellent heat dissipation properties of aluminum. That makes Aluminium Flex PCBs suitable for power modules. particularly in applications with high thermal requirements.

flexible aluminium PCB for cosmetology device

The flexibility and lightweight nature of aluminum-flex PCBs. That makes them suitable for certain medical devices. such as flexible sensors and monitoring equipment.

flexible pcb application-Communication


Communication devices were lightweight and had high-frequency performance. and heat dissipation are crucial. Aluminum Flex PCBs are employed in antennas. RF modules, and similar components.


In compact and lightweight consumer electronic products. Aluminium Flex PCBs can be used in applications like flexible displays, wearable devices, and more.

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How to Choose the Flexible Aluminium PCB Manufacturer?

Experience and Reputation:

Choose a manufacturer with extensive experience and a good reputation. GESP technology focus on aluminiium PCB and rigid PCB nearly 16 Years.

flexible aluminium PCB manufacturer

Quality System Certification:

Make sure the manufacturer has relevant quality system certifications, such as ISO 9001. we have past manufacturing is ISO 9001, IATF 16949, UL, RoHS, REACH, and IPC certified.

Customer Support and Communication:

Understand the manufacturer’s customer support services, including pre-sales consultations, technical support, and after-sales service. Effective communication is crucial for building long-term collaborative relationships. GESP Technology suppliies one-on-one customer services and engineering support throughout your aluminum PCB project.

Gesflex Circuit: Your Reliable Flexible Aluminum PCB

Explore top-notch China flexible aluminum PCB prototypes. and OEM flex PCB prototype solutions at Gesflex Circuit. Our innovative approach ensures precision and adaptability for diverse projects. Elevate your prototypes with our cutting-edge technology. Are you ready to transform your ideas into reality? Contact us now for a seamless experience!

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