Transparent FPC

Transparent FPC

Transparent FPC is a special type of FPC where transparency is achieved by using a transparent material as the substrate and conductive traces. Transparent FPC usually uses transparent polymers, such as PET or PC, as the base material.

Count on us for tailor-made transparent FPC solutions, exceptional quality, and personalized support. Choose Sienta as your trusted partner for reliable and high-quality transparent FPC supply!

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Transparent FPC

Capabilities Of Transparent FPC

Limit Tolerance Normal tolerance
Layer / 1-6 layer 1-6 layer
Cutting size mm 250*1000mm 250*500mm
Min. thickness mm 0.075mm 0.10mm
Adhesive stiffener um PSA:50um PSA:50um
Hot setting adhesive um 12.5/25/40um 12.5/25/40um
Min. drilling hole size mm 0.1 0.2
Hole diameter tolerance mm ±0.075 ±0.1
Hole wall copper thickness um 8/15/25 8/15/25
Min line width/space mm 0.05/0.05 0.075/0.075
Line width tolerance mm ±0.03 ±0.04
Silk screen thickness um 8 15
Immersion gold um Ni: 2.0~5.0 Ni: 2.0~5.0
Au: 0.03~0.08 Au: 0.03~0.08
Base Material

Transparent FPCs are typically made from flexible and transparent substrates. One common material used for transparent FPCs is a type of flexible plastic film, such as polyethylene terephthalate (PET) or polyimide (PI). These materials offer transparency and flexibility, which are crucial for applications where you need to bend or conform the circuit to non-planar surfaces while maintaining see-through properties.

The stack-up of a transparent FPC can vary depending on the specific requirements of the application. A basic stack-up might include the following layers.

a. Transparent Substrate This is the base layer, usually made of PET or PI, which provides flexibility and transparency.

b. Copper Traces These are the conductive traces that carry electrical signals.

c. Insulation Layer A dielectric layer that insulates the conductive traces from each other.

d. Cover Layer A protective layer that can also enhance transparency and provide durability.

e. Solder Mask (optional) If surface mount components are used, a solder mask layer may be applied to protect the exposed copper traces.

The specific stack-up and materials can be customized to meet the needs of the application, and more complex multi-layer designs are also possible to accommodate intricate circuitry.

Manufacturing Process

The manufacturing process of transparent FPCs is similar to that of traditional flexible PCBs, with some modifications to ensure transparency. It involves several key steps.

a. Material Preparation The transparent flexible substrate material is prepared, usually in the form of a roll or sheet.

b. Circuit Design The circuit pattern and electrical traces are designed using specialized software like .

c. Printing The circuit pattern is printed onto the substrate using techniques such as screen printing or inkjet printing.

d. Etching Unwanted copper or other conductive material is etched away to form the desired circuit pattern.

e. Component Attachment Surface mount components can be added to the transparent FPC.

f. Lamination Multiple layers can be laminated together to create a multi-layer FPC.

g. Testing The FPC is tested for electrical continuity and functionality.

h. Cutting and Shaping The FPC is cut and shaped to the desired dimensions.

i. Finishing Any necessary finishing steps, like the application of protective coatings, are performed.


Transparent FPCs are used in various applications, including but not limited to:

a. Consumer Electronics Transparent FPCs can be found in devices like smartphones, tablets, and wearables to connect and route components while maintaining aesthetics and form factor.

b. Automotive they are used in automotive displays and infotainment systems where transparency is required for heads-up displays and touchscreen applications.

c. Medical Devices Transparent FPCs are used in medical equipment, such as endoscopes and ultrasound machines.

d. Wearable Technology In products like smart glasses and fitness trackers.

e. Aerospace Transparent FPCs can be used in aircraft displays and lighting systems.

f. Industrial Control Systems In applications where flexibility and transparency are needed for control panels and instrumentation.

Transparent FPCs offer unique advantages in applications where aesthetics and flexibility are crucial, while still maintaining reliable electrical performance.

Benefits Of Transparent FPC

  • Enhanced Aesthetics

    Transparent FPCs offer visually appealing designs as the circuitry seamlessly blends with transparent materials. This feature is particularly valuable in applications where the appearance and aesthetics are essential.

  • Light Transmission

    Transparent FPCs allow for the transmission of light through the circuitry, making them ideal for backlighting applications.

  • Design Flexibility

    Transparent FPCs can be bent, folded, or conformed to curved surfaces, offering flexibility in product design. This versatility opens up a wide range of possibilities for creative and innovative applications.

  • Space Efficiency

    Transparent FPCs are thin, lightweight, and highly flexible.They are suitable for applications with limited space or where weight reduction is critical. They enable compact designs without compromising on functionality or performance.

  • Durability and Protection

    Transparent FPCs can be manufactured with protective coatings or encapsulants to enhance their durability and protect the circuitry from environmental factors such as moisture, dust, and scratches.

  • Versatility

    Transparent FPCs find application across various industries and sectors. They are used in diverse fields such as consumer electronics, automotive, medical devices, wearable technology, and more.


  • Q What is your MOQ(Minimum Order Quantity)?

    We have no MOQ limited.Sample and mass production all can support.

  • Q What is needed for quotation?

    FPC&rigid-flex PCB&PCB:Quantity, Gerber file and Technical requirements(material,surface finish treatment, copper thickness,board thickness ,...)
    PCBA:PCB information, BOM list

  • Q Can you manufacture my PCB from a picture?

    No, we cannot accept BMP, GIF, TIFF, or JPG pictures as the manufacturing file.If you do not have gerber file, you can send us sample to copy it.

  • Q Are my files safe?

    We ensure complete safety and security of your files and protect our customers' intellectual property throughout the entire process. Any documents provided by our customers are kept strictly confidential and are never shared with any third parties.

  • Q How long will it take to receive my quotation?

    We will respond your quotation within 24 hours to the quotation requests.

  • Q How can I pay?

    We accept payments by PayPal, cash, bank transfer (T/T),WU,Alipay. If need other payment method please contact us (

  • Q What's your transport method?

    We use UPS, FedEx, or DHL to ship the boards. If you have your own freight forwarding company, we can also work with them.

  • Q Do you offer free sample?

    We can offer samples, but you must pay for them first. If you go ahead with mass production later on, the cost of the samples will be deducted.We look forward to establishing a long-term business relationship with you!

  • Q What is your standard lead time?

    As FPC&PCB belong to customized products,generally it is 3-7 days for samples and 10-20 days for mass products.The actual delivery date according to difficulty of the products, the quantity and etc.Please contact us to get different product lead time.

  • Q How do you control the product quality?

    We adhere to strict quality control standards set by ISO 9001, ISO 14001, IATF 16949, and SGS. All boards undergo 100% testing and we offer a range of inspection options including visual, X-ray, AOI, and ICT/FCT.

  • Q How many layer can you produce for flexible PCB?

    For FPC, we can produce from 1 layer to 8 layers.

  • Q How many layer can you produce for Rigid flexible PCB?

    For Rigid flexible PCB board, we can produce from 2 layer to 8 layers.

  • Q Which surface treatment can you produce for FPC, PCB and rigid flexi PCB?

    We can produce Immersion gold, immersion silver, OSP, hot air Levelling(L/F), Gold plating,ENIPIG, Immersion tin and etc.

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