Patent ID: 8415589

Claim:
A heating resistance element component, comprising: a supporting substrate; an insulating film laminated on the supporting substrate; a plurality of heating resistors arranged at intervals on the insulating film; a common wire connected to one end of each of the plurality of heating resistors; and individual wires each connected to another end of each of the plurality of heating resistors; wherein a surface of the supporting substrate is formed with at least one first concave portion and at least one second concave portion, the at least one first concave portion having a width larger than a width of heating portions of the heating resistors and the at least one second concave portion having a width smaller than that of the at least one first concave portion, and the at least one first concave portion being arranged in a region directly under the heating portions of the heating resistors and the at least one second concave portion being arranged at an interval in a vicinity of the at least one first concave portion and not directly under the heating portions of the heating resistors so that heat generated by the heating portions of the plurality of heating resistors is prevented from flowing into the supporting substrate.