Flex Circuit Design Rules

Each supplier may have its own set of design rules and recommendations. Hardboards designing a flex circuit is only one step away from designing a hardboard. Figure 5 1 designing with a bias for copper improves the circuit s dimensional stability.

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Flexible circuits design guide.

Flex circuit design rules.

Please keep in mind the following design rules for your flex or rigid flex circuit boards. You can also refer to the standard. Design differences flex circuit vs. Flex and rigid flex boards.

For designers of flexible circuit boards we recommend the ipc 2223 guideline design guidelines for flexible circuit boards which is available from the ipc online store or in german from the fed website. We would be pleased to help you in delivery panel design for rigid flex solutions. Flex rigid design guide poster. Design rules for routing conductors on flexible circuits can be found in the ipc 2223 sectional design standard for flexible printed boards.

The course was written by john michael pierobon who has an advanced engineering degree from purdue university john michael has taught hundreds of technical courses throughout the world and speaks several languages fluently. Design guide for flex rigid pcbs. For flex annular rings need to be larger for flex rather than rigid. Designing flexible circuits is sponsored by all flex.

Pcb design and layout will also be affected by your planned circuit density and line spacing. The bend radius rule is just a general guideline. If you are not aware of this you will struggle with designing them. The most important design difference to keep in mind is the three dimensionality of a flex circuit.

It may not be practical for all applications. Using your circuit design software program position connector footprints in the proper locations and route conductors per schematic or net list. See here the digital version or order here as paper version for free. Applications which go beyond our standard design rules require technical clarification with our product management.

Flex designs require button plating. Also if you are using flex circuit design software that might not match up to the available guides for your flex circuits you will not have an easy time. Flex circuits follow different rules for being optimal than rigid circuits. Tolerance setting flex circuit designs proper application of tolerances of ex circuit design features is a matter that concerns both the ex circuit manufacturer and the ex circuit user.

During testing you are trying to see how many cycles the flex circuit can withstand. Heterogeneous system rigid circuit board wiring harness flex soldered in or plugged detachable. Below is a general rule on a flex circuit bend radius. Creative bending and flexing can save space and layers.

Understand that flex and rigid flex design rules are different. Documents for manufacturing flex rigid circuit boards basically standards must be regarded such as ipc 2223 ipc 6013 the basic design guide from würth elektronik as well as variant specific design rules and our drying recommendations. However because flex circuit is unique it is a good idea to use the same material in prototype that will eventually be used in volume production.