| 摘要 |
PROBLEM TO BE SOLVED: To provide a flame sensor in which a light-receiving section using a Schottky diode type structure is heat-treated, in advance. SOLUTION: The flame sensor is provided with a semiconductor light- receiving layer and at least a pair of electrodes provided on both sides of the light receiving layer. One of the electrodes and the light-receiving layer constitute a Schottky diode section. At least the Schokky diode section is heat treated at a temperature higher than the upper limit value of the operating temperature of the flame sensor.
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