Circuit board processing AD35


JJS Emphasizes Necessity for Baking Prior to flexible Printed Circuit Assembly

Britain-based JJS Manufacturing is an EMS enterprise which focuses primarily on end-to-end purchasing, manufacture (Circuit Board assembly, box build, cabinet, electro-mechanical) and supply chain solutions. The corporation supplies sophisticated, greatly configurable, low-to-medium-volume industrial electronics products across a wide range of markets which include industrial automation, process control, test and measurement, and lab technology.

Editor Stephen Las Marias talked with Russell Poppe, director of technology, about the challenges of addressing flexible circuit assemblies and provides approaches to handle them.

Stephen Las Marias: From your experience, what are the principal complications in flexible circuit assembly?

Russell Poppe: From an assembly viewpoint, baking the flexible circuits just prior to manufacturing assembly is very important as they can be vulnerable to delamination. In spite of this, baking any Circuit Board prior to manufacturing is most effective practice and some thing we usually carry out at JJS.

One of the greatest complications in flexible circuit assembly is to ensure the circuits keep flat, in particular through the printing and pick-and-place processes. The parts of the circuit requiring SMT placement should have an FR-4 stiffener designed in underneath; but it’s also essential to work with the Circuit Board supplier at the start. 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 challenge as flexible circuits are often times unusual shapes! It might additionally be required to have a tailored carrier or pallet to hold the flexible circuits in place through the process; nevertheless, these carry additional costs-commonly a few hundred pounds each.

Discover for yourself from JJS Manufacturing Russell Poppe

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