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Technical Articles

Technical Articles

Flexible PCBs (Part III) – Design Tips for Effective PCB Manufacturing and to Improve Product Quality

Know Your Application and Frequency of Usage

Before you design a flexible PCB, it is very important that you know what kind of bending flexibility is expected from the PCB in the application and during usage – Dynamic Bend, Semi-Dynamic Bend or Stable Bend. Following is a guide to help you decide this -

Criteria Dynamic Bend Semi-Dynamic Bend Stable Bend
Frequency of Bending Regular Moderate Once or Few Times (e.g. during installation)
No. of Layers 1 Layer (min)
2 Layer (max)
1 Layer (min)
4 Layer (max)
1 Layer (min)
10 Layer (max)
Mask Layer PI Coverlay PI Coverlay or Solder Resist PI Coverlay or Solder Resist
Min. Bending Radius 100-150 times flex PCB thickness More than 20 times flex PCB thickness 10-20 times flex PCB thickness

Conductor Routing – Design Tips

Avoid Right Angle & Hard Corners

Avoid Right Angle & Hard Corners

Maximise Line Widths

Maximise Line Widths

Avoid I-Beam Design

Avoid I-Beam Design

Add Tear Stops

Add Tear Stops

Ground Planes – Design Tips

Convert Continuous Solid Copper into Hatched Pattern

Convert Continuous Solid Copper into Hatched Pattern

Pads, Vias & Coverlay – Design Tips

Anchor Spurs & Add Fillets

Anchor Spurs & Add Fillets

Design Elongated Pads Instead of Traditional Round Pads

Add Coverlay Support to PTH & NPTH holes

Add Coverlay Support to PTH & NPTH holes

Add Coverlay Support to SMD Pad

Add Coverlay Support to SMD Pad

Bending Area – Design Tips

Rout Conductor Traces Perpendicular to Bending Axis

Rout Conductor Traces Perpendicular to Bending Axis

Bending Area – Design Tips

Divide Wide Traces Into Few Narrower Ones

Divide Wide Traces Into Few Narrower Ones

Fill Open Regions with Fake Traces

Fill Open Regions with Fake Traces

Do Not Change Conductor Width Abruptly

Do Not Change Conductor Width Abruptly

Avoid Vias & Component Pads

Avoid Vias & Component Pads

Slots & Cut Out – Design Tips

Slots & Cut Out

PCB Design Tips

When designing a PCB, try to limit the amount of draws you use. Draws use a lot of memory and slow the programming time. Use a flash for pads instead.

More tips...
Contract Assembly

Contract Assembly

We are one-stop solution provider for all your contract assembly requirements. We have the capability and resources to provide PCB assemblies, as well as cable and harness assemblies.

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SMT stencils

SMT stencils

More efficient manufacturing of solder paste SMT stencils.

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PCB design

PCB design

We'll review your PCB designs and identify refinements for easier manufacturing.

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For printed circuit boards (PCBs) or PCB assembly you can count on. Talk to the friendly and experienced team at QualiEco Circuits, Australia.