By Bob Willis
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Flexible circuits is another packaging technology which has seen a growing and wider acceptance in the electronics industry. The advantages of surface mount reduced weight; decreased size can be further enhanced by flexible circuitry. In many cases, it is a misconception that flexible circuits have to flex, they don’t; many flexibles are designed purely to aid the circuit design and assembly into the final product. In this case the substrate is only flexed or formed once. The range of constructions for circuit manufacture are wide but the basics are similar to existing printed circuit production. The design and selection of the manufacturing methods can affect the final cost of the circuit and need to be considered in detail prior to manufacture. Where design departments have limited experience useful reference material is available to engineers worldwide with the release of Flexible Circuit Technology, Third Edition by Joe Fjelstad and other publications.