Rigid-flex and semi-flex

Rigid-flex PCB

Rigid-flex PCB are hybrids consisting of a combination of conventional (rigid) PCB and flexible polymide. They usually consist of severals rigid parts that are seamlessly connected to each other by using a flexible film – they form mechanically and electrically a unit. Rigid-flex PCB are used when the PCB in the operation is exposed mechanical movement or vibrations, also if spatial conditions do not allow any other solution.
Becker & Müller is one of the specialized manufacturers of rigid-flex and semi-flex PCB and with this development competence we like to already be available for our customers in the development phase.

Advantages of rigid-flex PCB

Rigid-flex PCB have specific advantages that make them ideal for specific applications or developments.
These are the most important:

simplified assembly
favoring the miniaturization of the assembly
increase of mechanical and dynamic load capacity
increase of reliability (by reducing potential sources of error)
cost reduction at the assembly level by saving additional components (e.g. connection components)

Note: Special storage and processing guidelines apply to rigid-flex PCB

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Rigid-flex vs. semi-flex PCB

An addition to rigid-flex we also manufacture semi-flex PCB. The difference is that these are made only of FR4 material. Therefore, they are just suitable for a few bending cycles and also lower bending angles are provided. Semi-flex PCB are basically standard rigid PCB, which can be bent by depth milling into certain areas.
These properties are often sufficient, if the requirement is based just on a simplified installation or the saving of additional connection technology. Semi-flex PCB are therefore a more cost-effective alternative to rigid- flex PCB.