Hydrogen detection device and method for manufacturing the same

A hydrogen detection device comprising:

• a bridge circuit including a first resistive element, a second resistive element, a third resistive element, and a fourth resistive element, wherein
• one end of the first resistive element and one end of the second resistive element are connected to each other,
• one end of the third resistive element and one end of the fourth resistive element are connected to each other,
• an other end of the first resistive element and an other end of the third resistive element are connected to each other,
• an other end of the second resistive element and an other end of the fourth resistive element are connected to each other,
• each of the first resistive element, the second resistive element, the third resistive element, and the fourth resistive element is provided on a semiconductor substrate and includes:
• a first electrode including a principal surface and a second electrode including a principal surface, the principal surface of the first electrode and the principal surface of the second electrode facing each other;
• a metal oxide layer disposed in contact with the principal surface of the first electrode and the principal surface of the second electrode;
• and
• an insulating film covering the first electrode, the second electrode, and the metal oxide layer, and
• in at least the first resistive element among the first resistive element, the second resistive element, the third resistive element, and the fourth resistive element, the insulating film includes an opening that is not covered by the insulating film and through which an other surface of the second electrode opposite to the principal surface of the second electrode is exposed.