Patent ID: 8362584

Claim:
A pyroelectric detector comprising: a pyroelectric detection element having a capacitor including a first electrode, a second electrode, and a pyroelectric body disposed between the first electrode and the second electrode; a support member including a first side and a second side opposite from the first side with the pyroelectric detection element being mounted on the first side and at least one portion of the second side facing a cavity; and a support part supporting a portion of the second side of the support member, the support part, the support member, and the pyroelectric detection element being laminated in this order in a first direction with the cavity being formed between the support part and the support member, the support member having at least a first insulation layer on the first side contacting the first electrode of the capacitor, with the first insulation layer having a hydrogen content rate smaller than a hydrogen content rate of a second insulation layer positioned further in a second direction than the first insulation layer, the second direction being opposite the first direction, wherein the support member includes the first insulation layer, a nitride layer, and the second insulation layer laminated in this order in the second direction.