Cheap Flex PCB Online Prototype

Flexible PCB is considered one of the fastest growing technology in PCB manufacturing. It is defined by IPC as A patterned arrangement of printed circuitry and components that utilizes flexible base material with or without flexible cover lay.   Within a typical flexible-circuit construction the dielectric film forms the base layer, with adhesives used to bond the conductors to the dielectric and, in multilayer flexible circuits, to bond the individual layers together.

1. Flexible PCB Stackup

With their higher line density, improved impedance control, lighter weight and greater reliability, flexible circuits can be designed for a range of applications beyond the scope of traditional cabling and connectors. Often, flex circuitry is the only design option available that can provide a required combination of interconnect density, and electrical, mechanical and environment performance.

1.1 Basic Design Rules

Flexible PCB Design could be a difficult job.  Here layout some basic design rules :

Avoid using non-standard base dielectric material thickness and adhesiveless

laminate, both of which would entail special orders.

Don’t push tolerance requirement to extreme. It is very expensive to request levels that approach the limits of the tooling used and it will potentially result in a significant number of rejects.

Leave sufficient clearance between the edge circuit trace and the circuit outline. This error has been responsible for many circuit failures, not leaving enough clearance in the case of circuits for dynamic application circuit may prevent adequate cover-lay adhesion and promote delamination of the circuit material at the outline. Minimum distance should be in the region of 0.010″.

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