| abstract |
[PROBLEMS] To provide a gas sensor which has a low possibility of breakage of a lead wire, has a small wire diameter and can use a low rigidity lead wire, and can reduce power consumption. SOLUTION: Since a lead wire 6 is joined to an electrode 3 for a heater and an electrode 8 for a sensitive body by ultrasonic thermocompression bonding, a lead wire is joined to the electrode by another general welding method. Therefore, the wire 6 is hard to be broken, and the lead wire 6 having a small wire diameter and low rigidity can be used. By using the lead wire 6 having a small wire diameter, heat radiation due to heat transmitted through the lead wire 6 can be reduced. The power consumption of the heater 2 for heating the sensitive body film 9 to a predetermined temperature can be reduced. |