Patent ID: 6339220
Filing Date: 2002-01-15
Classification: G01J,H01L

Abstract:
A thermal infrared detecting device comprising:a lower layer portion having a readout circuit; an upper layer portion having a bolometer thin film covered with an insulating protective film to perform heat/resistive conversion, said bolometer thin film having a resistivity in order of about 1 to 10 m&OHgr;cm and a thickness of about 500 to 2,000 Ã¥, and said bolometer thin film consisting essentially of a manganese-based oxide; and an infrared reflection film formed on said lower layer portion; wherein said upper layer portion and said lower layer portion are spaced apart from each other while sandwiching a vacuum or sealed gas to form a thermal isolation structure, and also electrically connected to each other through an electrode film formed on or in said insulating protective film or in said insulating protective film; and wherein a space causing destructive interference of incident infrared frequencies is formed between said bolometer thin film and said infrared reflection film, whereby the infrared frequencies which in the past have caused a destructive interference are absorbed by said bolometer thin film.