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Your Leading Double-Sided Flexible PCB Manufacturer

RushFlex has extensive experience in providing high performance double sided flexible circuit boards. We believe in maintaining the highest standards with cost-effective solution for complex designs.

Manufacturing capabilities allow us to develop and produce state-of-the-art flexible printed circuit boards, from flexible prototyping to volume production, to meet your unique requirements.

  1. 1-4 Layer Flexible PCB
  2. 7/24 on-site sales and technical support
  3. No minimum order requirement; flexible PCB prototyping orders start from 1 piece
  4. 24-hour expedited flexible PCB prototype service
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When to Use Double-Sided Flexible Circuit Boards?

  • A double-sided flexible circuit board is required when the circuit density and wiring cannot be routed on a single-sided flexible circuit board.
  • Double-sided flexible circuit boards must be used when the ground and power layers are needed.
  • It is required for shielding applications.
  • Double-sided flexible circuit boards need to be used when a dense surface mount is required.

Characteristics of Double-Sided Flexible Circuit Boards

  1. A double-sided flexible circuit board is a double-sided circuit board that can be assembled on both sides of the circuit board.
  2. The double-sided flexible circuit board has two conductive layers.
  3. The double-sided flexible circuit board can adopt circuit board engraving technology.

As a leading flexible circuit board factory from PCB proofing to mass production, we have the production capacity of flexible and rigid-flex boards unmatched by other companies.

As your flex circuit supplier, you can build boards with line pitches as low as 19 microns (0.75 mils) and 1 mil micro vias.

Contact us to Get instant Quote for Double sided Flex PCB Online

Don’t hesitate to contact our sales and engineering team; we will provide high-speed PCB prototyping service for flexible circuit boards.

Double-Sided Flex PCBs: Specifications

While designing a flex circuit, you must consider certain specifications. These specifications will guide your manufacturer on what exactly he must include.

Number of Layers

Since there are different flexible PCBs, you should specify the type you need. Different types of boards have different numbers of layers.

Depending on your specifications, it can have one, two, or more layers.

High TG PCB Board Size

This feature refers to the heat resistance of the material you intend to use in fabricating the flex PCB.

You need to specify the type of resistors you need for your design. This largely depends on the type of material you will choose for your design.

Surface Treatment

There are different forms of surface treatment for you to choose from. There are no specific surface treatments for specific applications.

This gives you the freedom to choose from the surface treatments available in the industry.

Flex and Rigid Flex PCB

Some available finishes include:

  • Hot Air Solder Level
  • Electrolytic tin plating
  • Immersion Silver
  • Immersion tin
  • Gold and solder
  • Hard Gold on Nickel
  • Soft Gold over Nickel
  • ENIG
  • Organic Coated OSP

Solder Mask

Solder mask or solder mask coating comes in different forms. You must specify the type of solder mask you want and where you need it.

It can be located on one or both sides of the flex PCB. The type of flex PCB will also guide the placement of the solder mask.

Flex and Rigid Flex PCB Manufacture

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Double-Sided Flex PCBs Assembly

Copper Weight

  • The weight of the copper also places essential demands on your flex PCB. You will determine the copper weight for your application.
  • Keep in mind that the weight of the copper also affects flexibility. Therefore, you should be careful not to compromise on the flexibility of your design.

Finished Board Thickness

  • Besides weight, thickness is the most significant determinant of flexibility. The thicker the design, the less flexible it is.
  • It would be best if you made the design as thin as possible without compromising on the quality and functionality of the design.


  • Spacing has a significant impact on the functionality of a design. A small spacing may affect the functionality and shorten the entire circuit.
  • In other words, your design specifications should be as comprehensive as possible. The wider the spacing, the more functional the device is.

Hole size

  • It would be best to make the holes tighter to avoid drilling problems. This will keep your components mounted on the substrate tighter even when flexing the circuit.
  • The hole size should also be smaller and go well with the flexibility of the device. This is the requirement you must specify on double-sided and multilayer flex circuits.

Quality Level

  • Your manufacturer needs to know the quality level of your design.
  • You will determine this by the type of material your flex PCB requires. In addition to materials, flexible PCBs are available in various manufacturing grades.
  • The amount you are willing to pay will determine the type of quality grade you design for.

Quality Inspection

  • Quality testing is a critical process that your design must pass.
  • Quality testing will determine how well your design will perform. The manufacturer will quality test the design against the IPC guidelines.

Quality Compliance

  • It ensures that the designs meet the correct quality standards of the different agencies. Some materials may present a significant hazard to the environment or users.
  • It is the manufacturer’s responsibility to ensure that all quality standards are met. The primary quality standards it must comply with include RoHS and ISO9001:2000.

Trace Width

  • The trace width of flexible printed circuits varies by application type and design.
  • When specifying trace widths, make sure they are correct and do not affect the functionality of the design.
  • Making the trace width as wide as possible would be best to avoid functional problems.
  • Knowing the specs can take you one step further as a flex PCB expert.

Customers reviews

What people say?

I am really satisfied with my PCB. RUSH FLEX PCB saved my time.
Janean I.
Thank you so much for your help with our PCB board. Great job, I will definitely be ordering again!
Rachel U.

Where to order double-sided flexible PCB manufacturing online?

Flexible boards are present in most advanced electronic devices such as vehicles, aircraft and handheld PDAs, industrial and medical control equipment, satellites, and security systems.

 At RushFlex, you get impeccable services for double-sided flex PCB at a competitive process with a faster turnaround time. To get an instant quote for double flex PCB, send us your design today online.