What is the flexible circuit of the membrane switch? what is the purpose?

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Membrane switches have a variety of circuits: such as flexible circuits and rigid circuits. Flexible circuits are mainly used in connection parts of electronic products. The functional areas of flexible circuit boards can be divided into four types: lead wires, printed circuits, connectors, and multifunctional integrated systems. Its representative flexible substrate is PET. The challenge for the flexible circuit industry is to use its technological advantages to keep pace with the development of computers, telecommunication, consumer demand and the market.

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