In a shim board system with at least one shim board formed by an insulating substrate and at least one conductor trace on the substrate for generation of a shim magnetic field, in particular for homogenization of the basic magnetic field of a magnetic resonance apparatus, the insulating substrate is fashioned as a mesa in at least one segment similar to the conductor trace and following the curve of the conductor trace. Upon sealing, this allows a good saturation of the shim board system with sealing compound.