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Brief Introduction of Rigid Flexible Printed Circuit Board

 

Rigid Flexible Printed Circuit Board is a kind of rigid PCB endurance and resilience of new flexible PCB printed circuit board, in all types of PCB,rigid flex circuits is the most resistant of the bad application environment, so favored by medical and military equipment manufacturers, China’s enterprises are also gradually increasing the proportion of rigid flex pcb of the total output.

rigid-flex pcb

Physical properties of rigid-flex pcb

rigid flex circuits is different from the original soft plate and hard board in the material, equipment and process.In terms of material, hard material the FR4 is PCB material, such as the soft board material is PI or PET class material, There is a problem that the bonding between the two materials and the shrinkage rate of the hot press are difficult, and the stability of the product is a difficult point. Moreover, due to the characteristics of the three-dimensional space configuration, in addition to the stress in the XY plane, the Z axis Orientation stress is also an important consideration, there are currently material suppliers of rigid pcb board or flexible pcb manufacturers, to provide soft and hard board with modified materials such as epoxy (Epoxy) or modified resin (Resin), etc. Material to meet the rigid pcb board or flexible pcb board bonding problems.

In terms of equipment, because of the difference between the material properties and the product specifications, the soft and hard bonding plates must be corrected in the press-fitting and copper-plating parts. The application of the equipment will affect the yield and stability of the products. Therefore, Before the rigid flexible circuit board manufacturers must first consider the application of equipment.

Classification of rigid-flex pcb board

If according to process classification,can be divided into rigid and flexible composite pcb board and Rigid Flexible Printed Circuit Board of two major categories of products,the difference between hard and soft composite board technology, can be in the process, and rigid pcb board,flexible pcb board which have a common blind and buried hole design, and can therefore have a higher density of pcb circuit design, and soft and hard board technology, the soft board and hard board separately produced before the pressure synthesis of a single piece of circuit board , Signal connection but no through-hole design. However, currently used “Rigid Flexible Printed Circuit Board,” collectively referred to as all the hard and soft board products, without subdividing the two.

The advantages of rigid flex circuit board

1. Flexural flexibility, can change the shape according to the space limit.
2. High temperature resistance and fire resistance.
3. Folding without affecting signal transmission function.
4. Prevent static static.
5. Chemical change is stable, stable and reliable.
6. Facilitate the design of related products, reduce the working hours and errors, and improve the service life of related products.
7. Reduce the volume of application products, reduce the weight greatly, increase the function and reduce the cost.

rigid flex circuits
Application of rigid flex printed circuit boards

1. Industrial- industrial applications including industrial, military and medical use of rigid flex printed circuit boards.Most industrial components, the characteristics of vulnerability is accurate, safe and no soil, so the requirement of rigid flex printed circuit boards features are: high reliability, high accuracy, low impedance loss, complete signal transmission quality, durability. However, due to the complexity of the process, the output is small and the price is high.

2. Mobile phone – the application of rigid flex pcb boards in mobile phones, the most common features of the folding mobile phone are Hinge, Camera Module, Keypad and RF Module, etc.The advantages of the mobile phone are the integration of the parts in the mobile phone, and the second is the measurement of signal transmission.At present mobile phone products, the use of rigid flex pcb boards to replace the original two connectors and the combination of soft board, its most important significance in the product, is that can increase mobile phone folds active point of reliability, durability and long-term use so hard and soft board for its high product stability and cherished.On the other hand, due to the popularity of the phone, combined with multimedia and IT functions in the mobile phone, the internal signal transmission of mobile phones has become larger and the demand for modularity has been born.

rigid flex pcb board

3. In consumer electronics – consumer products, DSC and DV are representative of the development of hardware and software, which can be discussed in terms of “performance” and “structure”.In performance, rigid flex pcb board can be connected to different PCB board and solid components, so in the same line density can increase the total use area of PCB, the relative capacity can improve its circuit, and reduce the magnitude of the signal transmission contact limit with assembly errors.On the other hand, because the soft and hard plate is lighter and thinner, it can be flexible, so it is helpful to reduce the volume and reduce the weight.

4. Car – rigid flex pcb in the car use, commonly used are connected to the motherboard buttons on the steering wheel, car video system screen and control panel of the connection, the side door sound or function key operating connection, reversing radar imaging system, Sensor (Sensor, including air quality, temperature and humidity, special gas regulation, etc.), automotive communications systems, satellite navigation, rear panel and front controller connected with boards, car detection system and so on.

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