flex circuit board

2023-01-09 17:31:41 flex circuit board 311 Viewed

Flex circuit board provides excellent electrical performance, which can meet the design needs of smaller and higher density installation. Flex circuit board also helps to reduce assembly process and enhance reliability. Therefore, flex circuit board is the only solution to meet the miniaturization and mobile requirements of electronic products.

A flex circuit board is a printed circuit board made of flexible insulating substrate, which has many advantages that rigid printed circuit boards do not have. For example, a flex circuit board can be bent, wound and folded freely. Using the Flex circuit board can greatly reduce the volume of electronic products, which is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability.

Advantages of Flex Circuit Boards

1. Flex circuit board can be freely bent, folded, rolled, and easy to connect;

2. The Flex circuit board can be moved, stretched and arranged at will, which is easy to reduce the volume of electronic products;

3. The Flex circuit board has good heat dissipation and solderability, and is easy to realize assembly and connection integration.

The flex circuit board test can use the shrapnel microneedle module as the connection module to achieve the purpose of improving efficiency. The shrapnel microneedle module is a one-piece shrapnel design, which is highly adaptable in the field of small pitches, and can cope with pitch values between 0.15mm and 0.4mm. The performance is stable and reliable, and the needle will not break if it is not stuck. Can maintain long-term connection and current transmission.

Application of Flex Circuit Board

Flex circuit board is a type of PCB with excellent flexibility. Flex circuit board is made of polyester film or polyester imide, light and thin, high density, high flexibility, bendable and foldable, and has advantages that other types of circuit boards do not have.

Flex circuit boards are widely used in digital products, and flex circuit boards account for a large proportion in smart phones, which can meet the needs of mobile phone screens, batteries, and camera modules. In the 5G era, multi-functional modules for smartphones appear. RF modules, folding screens, and miniaturized models are all inseparable from the connection of the Flex circuit board.

The application of the Flex circuit board must first pass the test. During the test, the high-current shrapnel microneedle module can transmit current and connect signals. In the current range of 1-50A, the transmission is very stable and has better connection function, its service life can reach more than 20w times on average, and the minimum value in the small pitch is 0.15mm. The performance is reliable, and it is a connection module that is highly compatible with the Flex circuit board.

Advantages of Flex Circuit Boards


The main advantage of Flex circuit board is its elasticity and bending ability. As such, they can be manipulated in various ways to fit edges, folds and creases. The flexibility of the Flex circuit board also means that it is more reliable and durable than a normal PCB, as it reduces the effects of vibration and there is less wiring on the Flex circuit board. Minimal wiring eliminates the need for interface connections such as solder joints, contact crimps and connectors.

Reduce weight and space

Flex circuit boards not only allow greater design freedom, but also better space utilization and weight efficiency compared to other solutions. Flex circuit boards are thin and light, which can greatly reduce weight and space. For smaller devices, these Flex circuit boards can be folded, creased and placed in a smaller area to miniaturize the device. This makes Flex circuit boards better suited for small devices, as they can be mounted where rigid circuit boards cannot.

Suitable for harsh environments

Flex circuit board can be made of various corrosion-resistant materials, and flex circuit board can withstand harsh environments. The material of the flex circuit board can be waterproof, shockproof, moisture-proof or even corrosion-resistant. Therefore, Flex circuit board is widely used in military and medical applications because of its tough and durable qualities. The natural flexibility of the Flex circuit board also absorbs shocks and shocks better.

Better thermal management

The Flex circuit board is made of polyimide, which has excellent thermal stability and can withstand extremely high heat. It also means that improved heat dissipation makes the board a better basis for surface mounting and is less likely to experience thermal expansion and contraction. The Flex circuit board also dissipates heat faster than other solutions, increasing its thermal efficiency.

Cut costs

Flex circuit boards can help reduce assembly costs in several ways. The polyimide material of the Flex circuit board is thin and light, which means it requires less space. Less space requirements mean final assembly package size and material cost requirements. Since the Flex circuit board eliminates the need to route wires to solder points and connectors, assembly costs are further reduced as fewer components are required. By reducing the number of components and wires on the board, testing and rework time can be reduced, increasing productivity and efficiency.

Flex Circuit Board Thickness Requirements

The basic mechanism of Flex circuit board includes copper foil substrate, glue, cover film protection film, release paper, reinforcing board, etc. The degree of temperature rise can be significantly affected by the thickness of the insulation, the number of power lines, the specific construction design, air flow, etc. Because they have larger rectangular flex circuit board lines than graphics lines, they can carry higher currents under the same cross-sectional area, and the surface area can dissipate heat more effectively.

Therefore, the flex circuit board should not be too thick or too thin. Generally, the thickness of a single-layer flex circuit board is about 0.1mm, and that of a double-layer flex circuit board is 0.2mm. The process of a multi-layer flex circuit board is complex and expensive, and the thickness is variable.