Solder mask coating for printed circuit boards starrbiegsame

The invention relates to a solder resist coating (2) for a rigid-flexible printed circuit board (1) comprising one or more conductor tracks (13) and at least one bending area (5), wherein the solder resist coating (2) in the bending region (5) of the circuit board (1) one or more expansion joints (6), and a method for producing a solder mask coating of the invention (2). The invention further relates to an electronic assembly including at least one printed circuit board (1) with an inventive solder resist coating (2).