FIELD: heating.
SUBSTANCE: invention relates to planar heating element (1) comprising a PTC resistance structure (2) arranged in defined surface region (3) of first surface (4) of carrier substrate (5), wherein PTC resistance structure (2) is provided with electric terminal contacts (6) for connecting to electrical voltage source (7), wherein PTC resistance structure (2), on the basis of two electrical terminal contacts (6), has at least one inner conductor track (8) and parallel connected outer conductor track (9), wherein the inner conductor track (8) has a higher resistance than outer conductor track (9) and wherein the resistances of inner conductor track (8) and outer conductor track (9) are measured such that when a voltage is applied, there is a substantially uniform temperature distribution within defined surface region (3).
EFFECT: planar heating element with a PTC resistance structure is disclosed.
31 cl, 5 dwg
