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InGaAs/InP thermoelectric infrared sensor utilizing surface bulk micromachining technology

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4 Author(s)
Dehe, Alfons ; Tech. Univ. Darmstadt, Germany ; Pavlidis, D. ; Kyushik Hong ; Hartnagel, Hans L.

A novel InGaAs/InP micromachined thermoelectric sensor is presented. The key features of the reported sensors are the high thermal resistivity and high mobility of InGaAs lattice matched to InP, combined with a value of Seebeck coefficient that is acceptable for such applications. The anisotropic and selective surface bulk micromachining properties of this material system were successfully applied to devices aligned along the (010) orientation on a [100] InP wafer and the details of the technology used for this purpose are presented. A responsivity of 184 V/W and a relative detectivity of 7.1×108 cm Hz-1/2/W have been demonstrated using this new sensor approach

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Electron Devices, IEEE Transactions on  (Volume:44 ,  Issue: 7 )