Micromachined uncooled IR bolometer linear array using VO2 thin films

Mixed vanadium oxide thin films, as VO2 for the main composition are materi als for uncooled microbolometer due to their high temperature coefficient o f resistance (TCR) at room temperature, This paper describes the design and fabrication of 8-element linear array IR uncooled microbolometers using th e films acid micromachining technology. The characteristics of the array is investigated in the spectral region of 8-12 mum. The fabricated detectors exhibit responsivity of up to 10KV/W, typical detectivity of 1.89x10(8)cmH( 1/2)/W, and thermal time constant of 11ms, at 296K and at a frequency of 30 Hz, Furthermore, The uncorrected response uniformity of the linear array bo lometers is less than 20%.