ICAPE offers a wide range of solutions for your Flexible PCB

What's "Semi-Flex"?

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Because it is monomaterial, made only from FR4, Semi-Flex is a cheap alternative to complex Polyimide Rigid-Flex circuits.



Application and Benefits

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-save cost of traditional "connecting material" between two rigid PCBs: cables (discrete or flat), crimps, connectors, binders, labels, and their own cost of assembly.

-grant a better reliability than cables and connectors, as this is the most frequent cause of defect

- make assembly and integration into boxes and housing easier, thanks to a standardized 3D dimension.



Semi-Flex circuits are recommended for cost challenging applications, making Rigid-Flex improper.

Semi-Flex is approximately three times cheaper than the equivalent Rigid-Flex, and 30% cheaper than the equivalent rigid+cable+connectors solution, by considering their total cost.

Semi-Flex areas can be arranged as angled connectors on large PCBS.



Process

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A rigid multilayer PCB is arranged by designer, keeping clear all tracks and vias from the portion which is expected to be removed.

During PCB manufacturing, once lamination is processed, all layers of the selected portion are removed by Z-controlled accurate routing equipment, except the said remaining top or bottom layer(s).

Buried dummy pallets are placed by manufacturer to protect remaining layers from routing and help safe removal of useless material from Semi-Flex portion.



Requirement and Performance

Minimum bending radius (1layer): 5,0mm

This is much more than Polyimide flex, however it is enough for most applications.

180° bending angle is possible.

Number of possible bending cycles: less than 10

Only static “Flex-To-Install” application is recommended. No “Dynamic Flex” usage,which could damage FR4 flexible portion.

Total layers: not limited FR4 thickness of Semi-Flex: 0,05 – 0,2mm

Semi-Flex layers: 1 - 2 Copper thickness on Semi-Flex: 1 - 3 Oz

Covering layer on imaging in Semi-Flex area : Flexible solder mask (or Coverlay).




Length of Semi-Flex portion:

Angle Lenght of semi-flex portion (1-layer)
45° 45mm
90° 9mm
180° 18mm

Semi-Flex Data Sheet

schema_semi_flex


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