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JJS Emphasizes Importance of Baking Prior to flexible Circuit Assembly
England-based JJS Manufacturing is an EMS firm which centers on end-to-end procurement, manufacturing (Printed Circuit Board assembly, box build, cabinet, electro-mechanical) and supply chain solutions. The company supplies complicated, well configurable, low-to-medium-volume industrial electronics products across lots of market sectors for instance, industrial automation, process control, test and measurement, and laboratory technology.
Editor Stephen Las Marias chatted with Russell Poppe, director of technology, on the issues of coping with flexible circuit assemblies and provides strategies to address them.
Stephen Las Marias: From your experience, what are the key concerns in flexible circuit assembly?
Russell Poppe: From an assembly perspective, baking the flexible circuits before manufacturing assembly is significant as they can be vulnerable to delamination. On the other hand, baking any Printed Circuit Board prior to manufacturing is best practice and some thing we always do at JJS.
One of the largest concerns in flexible circuit assembly is assuring the circuits stay flat, especially through the printing and pick-and-place processes. The parts of the circuit in need of SMT placement ought to have an FR-4 stiffener designed in underneath; nevertheless, it’s also important to work with the Printed Circuit Board supplier beforehand. Getting the panelization right is essential so that the boards don’t bend when the parts are put or when they undergo reflow. Panel design is usually a difficult task as flexible circuits are often strange shapes! It may also be important to have a customized carrier or pallet to hold the flexible circuits in place during the entire process; even so, these carry added costs-typically a few hundred pounds each.
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