Multilayer Flex PCB

As the name suggests, a Multilayer Flex PCB combines the characteristics of “multilayer” with those of “flexible.” It finds typical use in situations where space is limited, and there are specific electrical performance requirements. Increasing the number of flexible circuit layers achieves the desired design functionality.

Read on to learn more about Multilayer Flex PCBs.

multilayer flex PCB
multilayer flex PCB-2

Structure diagram

Multilayer-3

When to Choose a Multilayer Flex PCB

Space Constraints

When to Choose a Multilayer Flex PCB Space Constraints Choose a multilayer design when double-sided circuits cannot meet the layout requirements due to limited space.

Electrical Performance Requirements

use Multilayer Flex PCBs in situations that require specific electrical performance, such as impedance control or interference shielding. Moreover, opt for Durability for Bending and choose these PCBs

Durability for Bending

When designing structures for rotation that require a high bending lifespan, such as in flip phones and laptops, we typically ensure they can withstand 100,000 to 200,000 bends. In summary, Multilayer Flex PCBs combine “flexible” and “multilayer” designs. They provide high-precision, flexible, and reliable solutions, making them suitable for various advanced and complex electronic products and applications.

In summary, Multilayer Flex PCBs combine “flexible” and “multilayer” designs. They provide high-precision, flexible, and reliable solutions, making them suitable for various advanced and complex electronic products and applications.

Types of Multilayer Flex PCB

Multilayer Flex PCBs minimize signal crosstalk and electromagnetic interference (EMI) by separating signal layers from power and ground planes. This improvement enhances signal integrity and reliability, making them suitable for high-speed and high-frequency applications.

Stacked Multilayer 

When high bending flexibility isn’t needed, we fix these PCBs within a housing. We add extra layers to meet wiring requirements when space is limited. Another use is adding a middle shielding layer to reduce interference and meet impedance needs.

Unstacked Multilayer

Use these PCBs in applications where bending durability is required. To ensure flexibility, you can stack multiple single-sided circuit layers without adhesive between them. Then, bond specific areas to achieve electrical conductivity, while keeping the other parts flexible.

Rigid-Flex Multilayer PCB

These PCBs have multiple layers in both the rigid and flexible sections. They ensure the characteristics of both “rigid” and “flexible” while meeting the requirements of multilayer wiring.

more about Rigid-Flex PCBs.

Stacked Multilayer Flex PCB

Stacked

Unstacked Multilayer Flex PCB

Unstacked

Rigid-Flex Multilayer PCB

Rigid-Flex Multilayer PCB

Single Sided Flex
Single Sided Flex
Double Sided Flex
Double Sided Flex
Rigid Flex PCB
Multilayer Flex 
Circuit Assemblies
PCB Assembly

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