In the case of a further development, it can be provided that the conductor track is divided by means of at least one path insulating region at least in part into at least two heating paths that are insulated with respect to one another. The insulation of the heating paths with respect to one another can be provided in particular along a length of the conductor track. It is feasible that the conductor track is not divided over its entire length into multiple heating paths that are insulated with respect to one another. On the contrary, it is possible to divide the conductor track in sections into heating paths that are insulated with respect to one another. Heating paths that are insulated with respect to one another are provided so as to allow current to flow through in the same direction. It can be provided that heating paths that are insulated with respect to one another are heating paths that are electrically connected to one another in parallel. A path insulating region can be formed, as in the above mentioned insulating regions, in general by means of a gap between the conductor tracks and/or can be formed by means of an electrically insulating material that is received in the gap. In particular, it can be expedient to produce path insulating regions by means of a laser treatment process and/or an etching process between the conductor tracks. Where necessary, the regions that have been processed by means of laser treatment or etching can be filled with a suitable insulating material.