Patent ID: 11874245
Assignee: KOA CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  C  H | IPC C  G

Claim 3:
4. The method of manufacturing a sulfidation detection sensor according to claim 1, further comprising:
an internal electrode forming step of forming an internal electrode on the main surface of the large-sized substrate so as to face one end portion of the sulfidation detection conductor with a space therebetween;
a resistor forming step of forming a resistor that connects between the sulfidation detection conductor and the internal electrode; and
a trimming step of forming a trimming groove on the resistor to adjust a resistance value,
wherein one of the first protective films has an undercoat layer and an overcoat layer which cover the resistor while the other one of the first protective films is formed on the sulfidation detection conductor.