Electromagnetic radiation detecting device comprising an active bolometer and a shielded reference bolometer

A device for detecting electromagnetic radiation that comprises on a single substrate:

• an active bolometer equipped with a first element sensitive to said electromagnetic radiation,
• a reference bolometer identical to the active bolometer, equipped with a second element sensitive to said electromagnetic radiation,
• a cover having an outer wall and an inner wall facing towards the second sensitive element, said cover covering at least the part of the second sensitive element exposed to the electromagnetic radiation and arranging an empty space separating the second sensitive element and the inner wall and,
• a reflecting shield forming at least a part of the outer wall exposed to said electromagnetic radiation,
• wherein the inner wall of the cover is constituted by an absorbent layer, said layer being made from a material absorbing at least the thermal radiations emitted by the second sensitive element, and
• wherein the reference bolometer has an insulating microbridge structure comprising anchorage points and the cover presses on at least two of said anchorage points.