This month we continue to delve into the matter of bending and folding flexible circuits, exploring, this time, how to get flexible circuits to hold their shape. This is a matter that is often glossed over but it is important in some designs to get the flex circuit to take on a reasonably permanent shape for any of a number of reasons, but most often the desire is to facilitate installation of the final assembly. While bending flex-circuit products for static, form-to-fit applications are common, holding shape is a more specific situation requiring more attention and, in some cases, more processing. The reason is that flex circuits have varying amounts of elastic memory.
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