Summary of content: What protective film is used to protect the flexible circuit board FPC board? Both anti-dust, anti-fouling and anti-static, as well as to effectively fit the board surface, anti-static PET protective film is the most suitable.
What is Flexible PCB(FPC)?
Flexible circuit board is also called “flexible board”, namely FPC board. It is a printed circuit made of flexible insulating substrate. Flexible circuits provide excellent electrical performance, can meet the design needs of smaller and higher density installations, and also help reduce assembly processes and enhance reliability. Flexible circuit boards are the only solution to meet the miniaturization and mobility requirements of electronic products. It can be freely bent, wound and folded, can withstand millions of times of dynamic bending without damaging the wires, can be arbitrarily arranged according to the space layout requirements, and can be arbitrarily moved and stretched in the three-dimensional space, so as to achieve the integration of component assembly and wire connection The flexible circuit board can greatly reduce the volume and weight of electronic products, and is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability.
Which market Flexible circuit board used for？
Therefore, FPC board has been widely used in aerospace, military, mobile communications, laptop computers, computer peripherals, PDA, digital cameras and other fields or products.
But FPC boards are prone to electrostatic breakdown during production. At present, the solution to this problem mainly depends on the antistatic table mats on the market, and the product relies on the static agent to add and migrate to the surface of the table mat, and then absorb air and water molecules to form a conductive path, which has an antistatic effect on the FPC board. At the same time, the product It is easily affected by environmental factors such as air and humidity, and the effect of static discharge is poor. Especially in areas with dry climates in the north, the surface resistance value increases. As time goes by, the anti-static index decays faster and faster, resulting in unstable electrostatic discharge, which easily breaks the circuit chip on the FPC board and causes damage to the equipment operation. At the same time, the product cannot be carried along with the FPC
board and cannot play a protective role at any time. The defects in the application link have been very obvious, and can no longer meet the requirements of the current FPC board development technology.
Which protective film is suitable for FPC?
The FPC board is now in a small but rapid development. The polymer thick film method is an efficient and low-cost production process. This process selectively screen-prints conductive polymer ink on an inexpensive flexible substrate. Its representative flexible substrate is PET. Polymer thick film conductors include screen-printed metal fillers or carbon powder fillers. The polymer thick film method itself is very clean, using lead-free SMT adhesive, without etching. Because of its addition process and low substrate cost, the polymer thick film method circuit is 1/10 of the price of copper polyimide film circuit; it is 1/2 to 1/3 of the price of rigid circuit board. The polymer thick film method is especially suitable for the control panel of the equipment. On mobile phones and other portable products, the polymer thick film method is suitable for converting the components, switches and lighting devices on the printed circuit board into a polymer thick film method circuit. Not only save costs, but also reduce energy consumption.
The application of antistatic PET protective film on the “flexible circuit board” has a very broad market prospect. Performance: The transparent antistatic PET protective film is relatively soft, similar to the hardness of the FPC board, and transparent enough to observe the FPC surface process requirements, but not with Of course, contact with outside air will not generate static electricity and dust. Since the anti-static protective film has anti-static coatings on both sides, it will not generate static electricity when it is separated from the FPC board, and of course it will not break through the chips on the circuit of the FPC board. This not only solves the static electricity generated during the transportation of the FPC board, but also can be bonded and transparent without being affected by environmental factors such as air and humidity. The products can be widely used in the semiconductor industry, LCD industry, electronic equipment and microelectronic equipment industry, electronic and electrical, communication manufacturing, precision instruments, optical manufacturing, pharmaceutical industry and bioengineering industries and high-speed rail cars, hospitals, homes, office areas Used in industrial production workshops, test rooms, computer rooms, hospital floors, CT, X-ray rooms, CCU, ICU wards, floors, worktops, wall panels, etc.