Infrared detector and associated production method

An infrared detector comprising:

• a base substrate supporting an array of micro-bolometers, each micro-bolometer being mounted in suspension above said substrate by means of anchoring nails extending substantially perpendicularly with respect to the base substrate;
• side walls extending substantially perpendicularly with respect to the base substrate;
• and
• an optical window fixed to an upper end of the side walls above the micro-bolometers, the optical window comprising no vent;
• the base substrate, the side walls, and the optical window forming a vacuum sealed cavity within which the micro-bolometers are present;
• characterized in that the infrared detector also comprises spacers extending vertically in line with at least 10% of the anchoring nails, these spacers being also oriented substantially perpendicularly with respect to the base substrate, said spacers forming a stop capable of cooperating with the lower surface of the optical window, or with the upper end of the anchoring nails, and thus limiting deflections of the optical window and/or of the substrate.