Semi-flexible circuit boards

In contrast to rigid plates, semi-flexibles are bendable at pre-determined points. To achieve this a special flex-(solder-stop) lacquer in applied to the required points instead of the usual solder-stop lacquer. These points are then ground to a defined depth at which the material is elastic and bendable. It should be noted that in contrast to flexi-boards the bending cycles and bending angles are more restricted. This method is particularly suitable for double-sided boards and multi-layers.