Rigid Flexible PCB

Reliable Rigid-Flex PCB Manufacturer

ISO9001/ISO13485/IATF16949/UL certificated.

A Rigid Flexible PCB combines hardboard and flexible circuits, offering the ability to fold or flex while maintaining its shape. Rigid sections hold components, while a flexible film connects the PCBs. Customized boards can have flexible layers inside or outside. These innovative boards streamline designs, enhance functionality, and improve electrical performance. As a reputable leader in rigid-flex PCB manufacturing, Sienta provides tailor-made boards that meet your requirements. Trust our expertise for high-quality rigid-flex boards that meet your project's unique demands.

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Rigid Flexible PCB

Capabilities Of Rigid Flexible PCB

PROCESS ITEM UNIT CAPABILITY
Limit Tolerance Normal Tolerance Remark
Board cutting &
thickness
Layer
cutting size: 250mm
Min. thickness
/
mm
mm
2-10 layer
250*1000mm
0.3mm
2-10 layer
250*500mm
0.3mm
/
/
/
Other auxiliary
material
Adhesive stiffener
hot setting adhesive
PI stiffener
Other stiffener type
um
um
um
/
PSA:50um
12.5/25/40um
PI: 1.0-13mil
steel, Al, silicon steel sheet
PSA:50um
12.5/25/40um
PI: 1.0-13mil
/
/
/
/
/
Drilling Min. drilling hole size
hole diameter tolerance
mm
mm
0.1
±0.075
0.2
±0.1
/
/
PTH hole wall copper thickness um 8/15/25 8/15/25 /
Exposure Min line width/space
hole ring
offset tolerance
Line width tolerance
Distance between hole edge to outline
mm
mm
mm
mm
mm
0.05/0.05
0.125
0.1
±0.03
≥0.4
0.075/0.075
0.2
0.15
±0.04
≥0.5
/
/
/
/
Lamination Coverlay tolerance
PI stiffener with outline
Sensitive PSA
FR4 location tolerance
mm
mm
mm
mm
0.15
±0.3
±0.3
±0.3
0.2
±0.3
±0.3
±0.3
/
/
/
/
Ink Soler mask thickness
Silk screen thickness
um
um
8
8
15
15
/
/
  R angle for etching cutting die mm 0.5 0.5 /
Profile Steel die tol. mm
mm
LS: ±0.075
HS: ±0.01
LS: ±0.075
HS: ±0.01
/
Cutting die tol. mm
mm
Etching: ± 0.20
Wooden: ± 0.30
Etching: ± 0.20
Wooden: ± 0.50
/
Laser tol.
Offset tol. for fingers
mm
mm
± 0.05
± 0.10
± 0.05
± 0.10
/
Surface
treatment
Immersion gold um Ni: 2.0~5.0
Au: 0.03~0.08
Ni: 2.0~5.0
Au: 0.03~0.08
/
Plating tin um 8~20 8~20 /

Benefits of Rigid Flexible PCB

  • Space-saving

    Rigid-flex PCBs eliminate the need for connectors and extra wiring, allowing for a compact design and efficient use of space within electronic devices.

  • Increased reliability

    The absence of connectors and interconnects reduces the risk of loose connections, short circuits, and mechanical failures, resulting in improved overall reliability.

  • Enhanced durability

    Rigid-flex PCBs are designed to withstand repeated flexing, bending, and vibration, making them suitable for applications that require durability and resistance to harsh environments.

  • Improved signal integrity

    The elimination of connectors and shorter signal paths in rigid-flex PCBs minimizes signal loss and electromagnetic interference (EMI), leading to improved signal quality and integrity.

  • Simplified assembly

    Rigid-flex PCBs streamline the assembly process by reducing the number of components and interconnects, resulting in faster and more efficient manufacturing.

  • Cost-effectiveness

    Despite the initial investment in designing and manufacturing rigid-flex PCBs, they can often reduce overall system costs by eliminating additional connectors, cables, and assembly steps.

Why Choose Sienta for Rigid-Flex PCB

Founded in 2010, SIENTA is a leading manufacturer specializing in flexible PCB,rigid-flex PCB and PCB assembly services.Our 12,000 square meter plant is fully equipped with state-of-the-art technology and staffed by over 300 experienced workers and a skilled technical team.

  • High-quality production achieved through advanced automation equipment.
  • Improve production efficiency, achieve 48-hour rapid customization of products, and deliver within 7 day.
  • All the PCB service will be 100% tested and inspected according to standards.
  • ISO 9001:2008, UL, ISO14001, ROHS, and TS16949 approved.

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Rigid Flexible Circuit Boards

Rigid Flexible PCB Production Process

Because of the diversity of the laminated structure and number of layers of the combination of rigid and flexible boards, we will take the four-layer rigid-flexible PCB in the more common single-sided PCB + double-sided FPC + single-sided PCB (1 + 2 + 1) through-hole laminated structure as an example of a simple understanding of the laminated structure, first of all, look at its laminated structure:

From the laminated structure can be seen, the flexible PCB substrate selection is generally selected without adhesive substrate, mainly to ensure the reliability of the hole metallization and the flexibility of the FPC area, the rigid PCB and flexible PCB bonding adhesive selection of PP to ensure that the bonding force, the flexible area of the solder mask is cover lay , the rigid board area of the solder mask is ink, the following and then take a look at its production process:

From the production process can be seen in the flexible PCB board substrate and rigid PCB substrate in the pre-processing process before pressing , exactly same with ordinary FPC board production process and rigid PCB board production process .

In the FPC and rigid PCB after the press ing process, looks and conventional double-sided PCB board process is almost the same, the following on a few different processes to be briefly explained:

Rigid flexible PCB pressing

in the high temperature and high pressure will be FPC board and rigid PCB board pressed together, in this process, need to ensure the balance of the thickness of the combination of flexible and rigid board, to avoid the phenomenon of warping . T he main equipment is vacuum compressor;

Cover opening

The purpose is to cut off the top and bottom layers of the rigid PCB board in the flexible board portion of the rigid-flex board, exposing the flexible board in the middle.T he main equipment is laser cutting machine .

AOI

That is, automatic optical inspection, through the optical reflection principle, the image will be transmitted to the equipment processing, and set the information compared to detect the line of open and short-circuit problems, it should be noted that the AOI does not detect the hole copper . T he main equipment is the automatic optical inspection instrument;

Drilling

Drilling positioning holes before pressing flexible and rigid part together , it mainly include drill directional holes, alignment holes, mounting holes, observation holes and ventilation holes, commonly known as first drill, while the flexible and rigid boards are pressed together , there mainly for drilling through holes, commonly known as the second drill .
The main equipment is drilling machine;

PTH

PLATING Through Hole, that is, the meaning of hole metallization, rigid flexible PCB is mainly used in the way of chemical copper plating (immersed copper), this point is different from the ordinary double-sided FPC (black hole) .
The main equipment is PTH lines ;

Outline

Routing + laser cutting , outline for rigid PCB part generally routing edge , while the flexible PCB area shape adopts the way of laser cutting or mould punching .
The main equipment has punching machine, laser cutting machine, routing machine and so on.

From the above production process, it is easy to see that even the most common 4-layer through-hole , rigid-flexible PCB has more than 30 production processes, the production difficulty is much greater than ordinary single and double-sided FPC, the yield rate will not be very high, the material, manpower, therefore, its price is expensive, the production cycle is longer .

However, SIENTA has high-end production equipment, c omplete quality system, in the field of rigid- flexible PCB board has 20 years of rich technical experience , has the best process experts , has the ability to supply large quantities of high-end Rigid -Flexible PCB board .

FAQ

  • 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 (sienta@sienta.com.cn).

  • 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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