| 摘要 |
PURPOSE:To prevent disconnection of a wire by widening a contact area of a heater layer and lead wire and to improve the durability, by extending a terminal part of the heater layer farther from the positions of through-holes provided on a substrate and connecting the lead wire with this extended part. CONSTITUTION:An unburned heater layer 103 is formed on a substrate material 102a made of an unburned insulating material by a screen printing method using electrically conductive paste. On this occasion, the layer 103 is provided with terminal parts 103a, 103b and extended parts 113a and 113b extended to a tip face 111 farther from the position of through-holes 110a and 110c provided on a substrate material 102b. Next, lead wires 109a and 109c are arranged on the parts 103a, 103b and the parts 113a, 113b and then, the material 102b is placed on said parts. These are burnt after press-fixing by heating and the electrically conductive paste is poured into the through-holes and then, the substrate incorparating the heater layer is obtained. A gas sensor is made by providing a gas sensitive body on the substrate. |
