All you want to know about Rigid Flex PCB

Rigid-Flex PCB combines the best characteristics of rigid PCB and flexible PCB, making it easier for manufacturers to install PCBs in small spaces. The increased flexibility allows manufacturers to accurately and easily manipulate the board during installation. Before using them, you must first understand all the basic knowledge of the rigid-flex boards.
WU5A0990 scaled e1623900231928 776x400 - All you want to know about Rigid Flex PCB

1.What is a rigid-flex board?

The birth and development of FPC (flexible board) and PCB (rigid board) gave birth to a new product of rigid-flex board. Therefore, the rigid-flex board is the combination of the flexible circuit board and rigid circuit board. After pressing and other processes, they are combined according to the relevant process requirements to form a circuit board with both FPC characteristics and PCB characteristics.

 

2.Application field

The rigid-flex PCB is widely used, such as smartphones and other smart devices; high-end Bluetooth headsets (requires signal transmission distance); smart wearable devices; robots; drones; curved displays; high-end industrial control equipment; aerospace satellites and other fields can see its figure.

With the development of smart devices in the direction of high integration, lightweight, and miniaturization, as well as the new requirements of Industry 4.0 for personalized production. With its excellent physical characteristics, the rigid-flex PCB will surely shine in the near future.
Rigid flex pcb 201707 - All you want to know about Rigid Flex PCB

 

3.The advantages and disadvantages of the rigid-flex PCB

Advantages:

It has excellent characteristics of both PCB and FPC, which can be folded and bent in half, reducing space, and welding complex components. At the same time, it has a longer lifespan and more reliable stability than the flat cable, and it is not easy to break, oxidize and fall off. It is very helpful to improve product performance.

Disadvantages:

There are many production processes for the rigid-flex board, the production is difficult, the yield rate is low, and the materials and manpower used are more. Therefore, its price is relatively expensive and the production cycle is relatively long.

 

4.The advantages of RCY in the production of rigid-flex board

  • Possess high-end production equipment and a complete quality system;
  • More than 20 years of rich technology accumulation in the field of circuit boards;
  • Best process experts in the field of the rigid-flex board. The core technical experts are the inventors of more than 50 invention patents;
  • The process capability to supply high-end multi-layer rigid and flexible boards in large quantities.

 

5.Common types of rigid-flex board

Rigid flex pcb application 20170724 - All you want to know about Rigid Flex PCB

Type 1: the combination of the rigid and flexible board

The flexible board (FPC) and the rigid board (PCB) are pasted into a whole, there is no plated hole connection at the pasting place, and the number of layers is more than one.

Type 2: rigid and flexible multi-layer combined board

There are plated holes and more than two conductor layers.

 

6.Rigid-flex board production process

Because the rigid-flex board is a combination of FPC and PCB, the production of the rigid-flex board should have both FPC production equipment and PCB production equipment.

First, the electronic engineer draws the circuit and shape of the flexible board according to the requirements, and then sends it to the factory that can produce the rigid-flex board. The CAM engineer processes and plans the relevant documents, and then arranges the FPC production line production site FPC and PCB production lines are required to produce PCB.

After these two rigid-flex boards come out, according to the planning requirements of the electronic engineer, the FPC and PCB are seamlessly pressed by a pressing machine.

After a series of details, the rigid-flex board is finally made. A very important link, because the rigid-flex board is difficult and there are many details, it is generally inspected before shipment, because its value is relatively high, so as to avoid the loss of related interests between the supplier and the demander.

1). Simple rigid-flex board production process

Cutting → mechanical drilling → plated through holes → filming → exposure → developing → etching → peeling film → fake paste → hot pressing → surface treatment → processing combination → testing → punching → inspection → packaging

2). Multi-layer rigid and flexible board production process

Cutting → pre-baking → inner layer pattern transfer → inner layer pattern etching → AOI inspection → laminated inner layer circuit cover layer → punching positioning hole → multi-layer lamination → drilling via hole → plasma decontamination → metalizing hole → Pattern plating → outer layer pattern transfer → etching outer layer pattern → AOI inspection → laminated outer cover layer or coating protective layer → surface coating → electrical performance test → shape processing → inspection → packaging

RCY Production Process Rigid Flex PCB - All you want to know about Rigid Flex PCB