Planar heating device for use with mirrors

摘要

Main electrodes (3, 4) are formed on the inner surface of a flexible insulating sheet (2) along opposed edges thereof, and junction electrode sections (3a, 4a) are formed on the main electrodes at their central portions. Comblike sub-electrodes (7, 8) extend from the main electrodes (3, 4) into interdigitated relation, and a layer of electrically resistive material (9) is formed over the main and sub-electrodes. Electrically conductive paths (5, 6) are formed on the inner surface of a terminal mounting substrate to which terminals are attached, and one ends of the conductive paths (5, 6) are connected with the corresponding junction electrode sections (3a, 4a) while the other ends thereof are connected with the terminals to be connected to a power supply. The terminal mounting substrate with the terminals is bonded to the insulating sheet. <IMAGE>