What is FPC harness internal resistance? What is FPC harness?

FPC wire harness is a flexible printed circuit board wire harness, composed of flexible substrate and electronic components, with a high degree of bending and flexibility, commonly used to connect various components of electronic devices.FPC wire harness internal resistance is the resistance of the current passing through the wire harness, is the energy lost when the current passes through the harness. Internal resistance is a very important parameter in the design of FPC wire harnesses, which affects the power consumption, transmission speed, and voltage stability of the harness.The substrates of FPC wire harnesses are usually polyester or polyimide films, which can be bent and curled so that the harnesses can be adapted to a variety of complex device structures. On the substrate through chemical etching, electroplating, printing and other processes to create a circuit board, a variety of electronic components mounted on the circuit board, and then the circuit board is curled into the shape of a wire harness, through the connector to connect to other components.FPC wiring harnesses are more complex manufacturing process, requires high-precision machining equipment and strict control of the production process, but because of its excellent flexibility and adaptability, is widely used in cell phones, tablet PCs, video cameras, automobiles and other electronic devices. The internal resistance of FPC wire harness is related to the material, circuit structure and wiring method of the wire harness. Commonly used FPC wire harness circuit structure has single-layer structure and multi-layer structure, single-layer structure of the internal resistance is relatively small, multi-layer structure of the internal resistance is relatively large, but it can improve the impedance matching and anti-jamming ability of the wire harness. The wiring method also affects the internal resistance of the wiring harness, generally using symmetrical wiring can reduce the internal resistance. In addition, the harness contact and connectors will also affect the internal resistance of the harness, poor contact or poor quality connectors will lead to increased internal resistance, affecting the transmission performance of the harness.The internal resistance of the FPC harness is mainly manifested in the voltage drop when the harness passes the current, i.e., the IR drop of Ohm's Law (Ohm's Law). The size of the internal resistance of the harness will directly affect the power consumption and voltage stability of the harness, so in the design of the FPC harness need to pay attention to the control of internal resistance. A common method is to reduce the internal resistance by increasing the width of the harness and reducing the length of the harness. In addition, special materials and circuit structures can also be used to reduce internal resistance.

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