3.9.1 Semi-Flex PCB | General
Features & Advantages
- Space and weight reduction
- Resulting assembly is more reliable thanks to the minimization of system interfaces (elimination of connectors and solder joints)
- Resulting stackup has better electrical and dielectric properties (impedance applications, shielding, defined losses)
- Cost savings in terms of the complete assembly (component placement, installation, repair)
Frequently asked questions
How do Semi-Flex and Rigid-Flex PCBs differ from each other?
Semiflex PCBs are an economical solution for applications requiring limited flexibility. They are made from a homogeneous FR4 composite and are flexibilized by specifically thinning certain areas through depth milling or by using a thin FR4 laminate. This construction is mainly suitable for one-time installation or a few bending cycles. On the other hand, Starrflex PCBs, due to their heterogeneous composition of FR4 material and a highly flexible polyimide laminate, are significantly more flexible in terms of bending radii and angles. Moreover, they are designed for applications requiring a higher number of bending cycles compared to Semiflex. However, Starrflex PCBs are also not suitable for applications where the flexible area/areas of the PCB are subjected to continuous mechanical movements. For more detailed information on the specifications and application areas of Semiflex and Starrflex technologies, we recommend first consulting the "General" sections of both PCB technologies.
How many bending cycles can Semi-Flex PCBs withstand?
The number of bending cycles for semi-flex PCBs varies between 5 and 10, depending on the technology. For further details and a comparison of the various technology variants, please refer to "3.9.1 Semi-Flex | General" at the end of the article under "Technology Comparison – Typical Semi-Flex Stackup Types".
Keywords
- Semi-flex
- Bending radius
- Bending cycles
- Bending angles
- Design to Cost
- Multidimensional PCBs