Soft hard combination board(also known asHard board, flexible board, orSoft hard integrated circuit board）It integrates a hard circuit board (usuallyRigid PCB）And flexible circuit board（FPC）A hybrid circuit board. It combines the advantages of rigid and flexible boards and is widely used in electronic products that require high density, complex layout, and high performance requirements.

Structure of Soft Hard Composite Board

The basic structure of a soft hard composite board consists ofHard partandFlexible partThe rigid part is usually used to carry more complex components or chips, while the flexible part is used to provide flexible connections and layouts. Its structure can be roughly divided into the following parts:

1. Rigid part：

   • Usually it is a multi-layer rigid circuit board, similar to a traditional PCB (Printed Circuit Board).
   • Used to carry electronic components that require fixation, such as chips, resistors, capacitors, etc.

2. Flexible part：

   • Using flexible circuit board (FPC) materials, usually flexible substrates such as polyimide (PI) or polyester (PET).
   • Allowing circuits to bend or fold to a certain extent, it is widely used in places that require spatial optimization or dynamic adjustment.

3. Transition layer：

   • The interface layer that connects the rigid and flexible circuit components. This transition layer usually uses certain special materials to ensure stable electrical and mechanical connections between the two.

Advantages of Soft Hard Composite Board

1. Save space：

   • Due to the fact that flexible circuit boards can be bent, folded, or compressed, the combination of soft and hard boards can achieve more complex wiring designs in limited space, making them suitable for miniaturized electronic devices.

2. high reliability：

   • The rigid part provides stable support, ensuring the mechanical strength of the circuit board, while the flexible part increases the flexibility of the design, making it suitable for use in devices that require dynamic changes or complex shapes.

3. Complex design：

   • It can simultaneously achieve multi-layer rigid design and flexible wiring. For the design of some complex circuits (such as 3D circuit boards), a combination of soft and hard boards is an ideal choice.

4. Seismic resistance and anti-interference ability：

   • In some high vibration or high reliability applications, flexible circuit boards can better withstand physical shocks or vibrations, enhancing their anti-interference ability.

Application of Soft Hard Composite Board

The application of soft hard composite boards is very extensive, especially in some electronic devices that require high performance and miniaturization:

• Smartphones, tabletsInside a mobile phone, a soft hard interface board is often used to connect the screen, antenna, battery, and motherboard.
• Medical equipmentIn some portable medical devices, the combination of soft and hard boards helps to save space while providing high performance.
• Automotive ElectronicsUsed in fields such as automotive instrument panels, seat heating, sensor modules, etc.
• Consumer ElectronicsSuch as headphones, smartwatches, portable speakers, etc.
• Industrial Control and AerospaceUnder certain special requirements, the combination of soft and hard boards can meet the demands of high precision and high reliability.

Production process

The manufacturing process of soft hard composite board is relatively complex, usually including the following steps:

1. Hard part productionThe traditional PCB manufacturing process uses multi-layer board technology.
2. Flexible part productionFlexible circuit boards are made of thin film materials and are completed through processes such as etching and etching.
3. Stacking and WeldingCombining the rigid and flexible parts through special processes and materials to ensure electrical connection and mechanical stability.
4. Testing and Quality ControlConduct rigorous electrical and mechanical performance tests to ensure the quality of the soft hard bonding board.

summary

As a hybrid product that combines the advantages of rigid and flexible circuit boards, the soft hard composite board has great design flexibility and functionality, especially playing an important role in modern electronic devices that require miniaturization, high-density layout, and high reliability.