Liquid helium-cooled bolometer wherein the sensitive element and the elements linking the latter to the electrical connections are obtained from the same semiconductor body

摘要

Bolometer cooled to a very low temperature, wherein the sensitive element has a very low thermal capacity and, for this purpose, a semiconductor crystal extended on two faces by beams made of the same material, but of smaller section, which have been metallized. These metallized beams, wherein the volume of crystal has been reduced to a minimum by their very small section, directly or indirectly provide the thermal link with the cryostat and the electrical link with the measuring circuit making it possible to eliminate all welds using bonding metal on the side of the crystal which forms part of the sensitive element. In a preferred mode of embodiment, the thermal substrate thermally linked to the crystal is a piece of monocrystalline diamond.