| In general terms, a Flexible Printed Circuit (FPC) is a patterned arrangement of copper foil which utilizes a flexible base material and may or may not contain a flexible coverlay. There are six classifications of flexible printed circuits: Single Sided, Double Sided, Sculptured®, Double Access or Back Bared, Multi-layer, and Rigid-Flex. Each of these six classifications of a Flexible Printed Circuit performs its own unique function upon use in an application. Flexible Printed Circuits represent one of the fastest growing interconnection market segments and are unmatched in terms of their versatility. Advantages There are many advantages to using ACT's FPCs. They utilize the thinnest dielectric substrates available for electronic interconnection, and are known for their ability to reduce package size as well as package weight. FPCs can reduce the weight of an electronic package significantly. This weight reduction makes flexible circuits extremely popular in the aerospace industry. Another advantage of FPCs is assembly costs. Reduction of assembly costs is achieved by reducing the number of assembly operations and having the capability to test the circuit prior to committing it to assembly. A properly designed FPC is an excellent means of reducing the number of levels of interconnection required in an electronic package. Flexible printed circuits can eliminate wiring errors associated with hand-built wire harnesses, since it is not possible to route flexible printed circuits to points other than those designated in the artwork. In today's interconnection scheme, flexible printed circuits are unmatched in terms of their versatility. 
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