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Double Layer Flexible Circuit Board

Layer: 2 
Thickness: 0.2mm
Copper: 1OZ for All Layer
Surface Treatment: Immersion Gold
Application: Sensor Film FPC
Highlights: Extra-long independent traces do not allow repair of the circuit.

Double Layer Flexible Circuit Board has an extra copper layer than single-sided FPC in structure, and there are vias connecting the top and bottom Layers. In other respects, they are basically the same, the same material, the same protective film, the same stiffener.

Common FPC sizes are not too large, as most act as connectors inside the product.

However, there are FPC as the main component of the product, this two layer FPC with size of 280*142mm, is the main component of the handwriting capacitive screen, similar to a sensor film.

What material is flex PCB?

FPC materials are divided into main materials and auxiliary materials.

The main material is generally Polymide + copper (adhesiveless), or  Polymide + glue + copper (adhesive).

And auxiliary materials mainly include: coverlay(Similar to solder mask), stiffener( Polymide/FR4/Metal Sheet), Electromagnetic shielding film.

Can Flex PCB have vias?

Today, the technology for making via on FPC is very mature, and because FPC is relatively thin, it is easy to make 0.1mm vias. 

However, the vias of multilayer FPC and rigid-flex PCB are still difficult, because there are many types of materials mixing in the stack, and the drilling parameters and pre-PTH processing are particularly critical.

How thick is a 2 layer flex PCB?

The conventional double-sided FPC thickness is between 0.1-0.2mm, considering the cost and usage scenarios, it is generally not recommended to be too thick. 

In addition, FPC usually uses stiffener as an auxiliary material to reinforce specific positions, and can also be used as a means to increase thickness.

What is the maximum size of flex PCB?

The main material of FPC is basically packed by roll, the length is 50 meters, and the width is relatively fixed, generally 250 mm or 500 mm. Therefore, the factors that restrict the size of FPC are mainly in width. 

In addition, the equipment also has certain requirements to allow the working panel passing through. 

At present, the maximum size of flex PCB produced by SEEKPCB is 600*600mm, this is a custom flexible pcb and the material is also specially customized.

As a flexible PCB supplier, SEEKPCB excels in flexible PCB prototype and High mixed Low Volume orders, as well as challenging designs.


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B206, Xihuan Road, Shajing, Baoan district, Shenzhen


SEEKPCB is specializing in electronics one stop solution, including PCB design, PCB manufacturing, PCB Assembly, Component sourcing. Quick turn PCB prototype, express PCB assembly are our strengths to fullfil fast time-to-market and your vitory.

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