Patent ID: 6144030
Filing Date: 2000-11-07
Classification: G01J

Abstract:
An uncooled microbolometer detector element for a focal plane array, said microbolometer comprising:an optically absorptive material structure characterized by an absorptive material having an electrical resistivity that varies as a function of its temperature;a thermal isolation structure coupled in spaced relation to said optically absorptive material structure for thermally isolating said absorptive material;a sensor coupled in spaced relation to said thermal isolation structure and communicating with said optically absorptive material structure to sense a resistivity of said optically absorptive material structure;said optically absorptive material structure including a planar member coupled to a first set of downwardly projecting leg members, said first set of leg members being coupled to said thermal isolation structure for supporting said planar member in spaced relation above said thermal isolation structure;said thermal isolation structure including a planar surface coupled to a second set of downwardly projecting leg members, said second set of leg members being coupled to said sensor for supporting said planar surface in spaced relation above said sensor such that said thermal isolation structure is disposed between said optically absorptive material structure and said sensor; andsaid planar surface of thermal isolation structure having a serpentine configuration meandering from a first end to a second end.