Patent ID: 8415622
Filing Date: 2013-04-09
Classification: G01J,H01L

Abstract:
1. An infrared imaging element comprising: a semiconductor substrate comprising a stacked structure of a silicon first substrate, a first insulation film, and a silicon layer stacked in the cited order, a plurality of first cavities being provided on a surface of the first substrate on a side of the first insulation film; an infrared detection unit provided in the semiconductor substrate to detect incident infrared rays, the infrared detection unit including, a circuit unit provided in an area of the semiconductor substrate which differs from an area where the infrared detection unit is formed, the circuit unit including a drive circuit which drives the selection line, a signal processing circuit which process the electric signal sent via the signal line, and a third insulation film covering the drive circuit and the signal processing circuit and having a top face located at a greater distance from the semiconductor substrate as compared with a top face of the second insulation film; a second substrate provided over the third insulation film to cover the infrared detection unit; and a reflection film provided on a face of the second substrate opposed to the infrared detection unit, wherein a second cavity is formed between the second substrate and the infrared detection unit, and with respect to each detection cell, the first substrate located right under the first cavity functions as a transmission window of the incident infrared rays.