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Introduction To The Rigid-Flex PCB Knowledge

The essence of the Rigid-Flex Board is to use FPC as one or two circuit layers of PCB and then partially mill the Rigid part of PCB, leaving only the flexible part.

 

What is Rigid-flex Board?

The birth and development of FPC and PCB gave birth to Rigid-Flex Board, a new product.

Therefore, Rigid-flex boards are flexible circuit boards and Rigid circuit boards with FPC and PCB characteristics formed by combining them together according to relevant technical requirements through pressing and other processes.

 

Advantages and disadvantages:

Advantage: Rigid-flex Board has the characteristics of both FPC and PCB, so it can be used in some products with special requirements. It has a certain flexible area and a certain Rigid area, which is of great help to save the internal space of products, reduce the volume of finished products, and improve the performance of products.

 

Disadvantages: Rigid-flex Board has many production processes, difficult production, low yield rate, and a lot of materials and manpower. Therefore, its price is expensive and its production cycle is long.

 

Rigid-flex Board is not cheap, so why adopt Rigid-flex Board?

 

When it comes to hardware design, the cost is often not the key factor;

First, reliability: Rigid-Flex Board can solve the installation reliability problem of FPC.

Connecting through connectors in FPC brings problems of installation cost, inconvenient installation, installation reliability, and easy short circuit, shedding and other problems. The phenomenon of repairing welding between FPC and PCB after the installation of FPC is seen in the design of a cylinder machine of Hikvision for mass delivery. Rigid-Flex Board solves the problem of FPC installation reliability.

 

Second, comprehensive cost:

Rigid-flex boards, although the price per unit area is increased, save connector costs while reducing installation time, repair rate, improved producibility and reliability. In the mass delivery of products used, is often effective in reducing costs.

 

So the calculated cost:

Rigid-Flex Board Area * Rigid-Flex Board Unit Price – Processing Time Cost – FPC Loosen and Repair Cost * Loosen Probability – Whether the management cost caused by fewer types of veneers is greater than the original PCB Area *PCB Unit Price +FPC Price + connector Price

 

Third, effectively improve signal quality

Better route continuity and signal integrity as connections are not made through connectors. Traditional IPC uses FPC and connectors to connect the Sensor board to the main control board. Rigid-flex board can be used to integrate the main control Board and sensor Board, which solves many problems and also meets the structural design requirements of the barrel machine.

 

Design of Rigid-Flex Board

  1. The bending radius of the flexible plate needs to be considered. If the bending radius is too small, it will be easy to damage.
  2. Effectively reduce the total area and optimize the design to reduce the cost.
  3. The structure of the three-dimensional space after installation needs to be considered.
  4. The optimal design of the number of layers for the routing of the flexible part should be considered.
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Company Info

XPCB Limited is a premium PCB & PCBA manufacturer based in China.

We specialize in multilayer flexible circuits, rigid-flex PCB, HDI PCB, and Rogers PCB.

Quick-turn PCB prototyping is our specialty.  Demanding project is our advantage.

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XPCB Limited
Address :
Building 3, JinFeng Industry Area,  Fuyong Town, Baoan District, Shenzhen, Guangdong, 518103, China.

Tel : +86-136-3163-3671
Fax : +86-755-2301 2705
Email : [email protected]

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PCB Blog

The Future of Wearable Technology: Rigid-Flex PCB

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Electromagnetic Compatibility Design of Mobile Phone PCB (1)

Read More »

The PCB Circuit Design of LED Switching Power Supply

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