INFRARED DETECTION ELEMENT, INFRARED DETECTOR, AND INFRARED TYPE GAS SENSOR

摘要

An infrared detection element includes a first pyroelectric element and a second pyroelectric element, and the first pyroelectric element and the second pyroelectric element are arranged in a single pyroelectric substrate. The first pyroelectric element includes a first surface electrode, a first back face electrode, and a first portion that is interposed between the first surface electrode and the first back face electrode. The first portion is provided as part of the single pyroelectric substrate. The second pyroelectric element includes a second surface electrode, a second back face electrode, and a second portion that is interposed between the second surface electrode and the second back face electrode. The second portion is provided as part of the single pyroelectric substrate. The single pyroelectric substrate is provided in part thereof surrounding the first pyroelectric element with a slit that is shaped along an outer periphery of the first pyroelectric element. The slit is formed out of regions in which a first surface wiring and a first back face wiring are disposed. Part of the single pyroelectric substrate surrounding the second pyroelectric element is continuously formed over an entire circumference of the second portion. An infrared detector includes the infrared detection element. An infrared type gas sensor includes the infrared detection element and an infrared emitting element.