Flexible rigid PCB introduction

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

Chinese name: soft and hard board

Foreign name: FPCB

Concept: circuit board with FPC characteristics and PCB characteristics

Advantages: save product internal space

Disadvantages: difficult production, low yield rate

 

basic introduction

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

 

Production Process

Because the rigid-flex board is a combination of FPC and PCB, the production of 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 flexible and hard 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 soft and hard boards come out, in accordance with the planning requirements of the electronic engineer, the FPC and PCB are seamlessly pressed through a pressing machine, and then a series of detailed links are completed. Become a rigid-flex board. 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 supply and demand sides.

 

Advantages and disadvantages

 

Advantages: The rigid-flex board has the characteristics of FPC and PCB at the same time. Therefore, it can be used in some products with special requirements. It has both a certain flexible area and a certain rigid area, which can save the internal space of the product. , It is of great help to reduce the volume of finished products and 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.

 

Application field

The characteristics of the rigid-flex board determines its application area to cover all the application areas of FPC in PCB, such as:

mobile phone

Button board and side buttons, etc.

Computer and LCD screen

Motherboard and display screen, etc.

CD Walkman

Disk Drive

NOTEBOOK.

Latest use

Hard disk drive (HDD, hard disk drive) suspension circuit (Su ensi.N cireuit) and xe package board and other components.

 

Process flow

1 Material selection

2 Production process and control of key parts

2.1 Production process

2.2 Graphic transfer of the inner single chip

2.3 Multi-layer positioning of flexible materials

2.4 Laminating

2.5 Drilling

2.6 De-drilling and convex erosion

2.7 Electroless copper plating, copper electroplating

2.8 Surface solder mask and solderability protective layer

2.9 Shape processing