Flex Pcb: How to Choose Right Material
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Sep 29.2022, 14:35:22
Flexible Printed Circuits – How to Choose the Right Material for Your ApplicationFlexible printed circuit (FPC) technologies have been proven as reliable and effective solutions to dynamic environments. Design circuits is supported by most modern E-CAD tools, but material selection for your FPC application can be a tricky process. In this article we will consider material selection for the FPC substrate, conductor, coverlay, surface finish, and stiffeners.SubstrateThe substrate is the core of a flex circuit stackup. Polyimide (PI) and Polyester (PET) are a fantastic choice for the vast majority of FPC applications as they offer a wide range of cost and performance to meet designers’ needs.In general, PET is a low-cost solution with great tear strength and thickness for most applications but falls short in its temperature rating. Since soldering would melt the material, polyester flex circuits use a conductive epoxy paste which acts like a glue attaching devices to the conductors. The s...