Types of reinforcement for flexible circuit boards

Types of reinforcement for flexible circuit boards

Have you ever faced the problem of how to choose the appropriate reinforcement for the flexible circuit board? Do you know how many kinds of reinforcement are available for flexible circuit boards? Do you know the reason why reinforcement needs to be added to the flexible circuit board? The advantages and disadvantages of FPC reinforcement are that the PI tolerance is small but not very hard, the FR4 thicker thinking selection tolerance is larger, and the steel sheet is hard and stable, and it is not easy to rework after manual assembly. Today, let's study different types of reinforcement for flexible circuit boards.

For the types of FPC reinforcement, we usually only use three types of reinforcement. PI polyimide, FR4 and steel sheet.

1. PI reinforcement: tolerance can be controlled within+/- 0.03mm, high accuracy, high temperature resistance (130-280 ℃)

2. Steel sheet reinforcement: manual assembly is required, the process is more complex and the cost will be higher.

3. FR4 reinforcement: if the thickness is less than 0.1mm, the tolerance can be controlled within+/- 0.05mm. If the thickness is greater than 1.0mm, the tolerance is+/- 0.1mm

FPC reinforcement thickness

1. PI reinforcement thickness: 0.075mm, 0.1mm, 0.125mm, 0.175mm, 0.2mm, 0.225mm, 0.25mm

2. FR4 reinforcement thickness: 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 1.6mm

3. Steel sheet reinforcement thickness: 0.1mm, 0.2mm