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- W2077459211 abstract "Based on the Seebeck effect, the CMOS compatible micromachined thermopile is widely used in infrared detection for its advantages of low-cost, high batch yield, broad spectral response and insensitivity to ambient temperature. We present two integrated thermopile IR detectors on stacked dielectric layers realized by a standard P-well CMOS technology, followed by one CMOS compatible maskless XeF2 isotropic dry-etching step. Characterizations of CMOS devices, before and after XeF2 etching, respectively, were performed to investigate the effects of XeF2 etching on the CMOS devices. With a 2.5 µm thick stacked silicon oxide–nitride–oxide layer as an absorber, the rectangular thermopile detector and the circular thermopile detector provided responsivity of 14.14 and 10.26 V W−1, specific detectivity of 4.15 × 107 and 4.54 × 107 cm Hz1/2 W−1, and time constant of 23.7 and 14.6 ms, respectively. Compared with the rectangular thermopile detector, the circular thermopile detector is mechanically more stable, because its circular structure design eases the internal stress problem in the CMOS layers. After XeF2 etching, the maximum changes of threshold voltage, maximum transconductance and switching threshold voltage were 0.97%, 1.25% and 0.08%, respectively. Experimental results show that the effects of XeF2 etching on the CMOS devices are insignificant, and XeF2 etching is suitable for post-CMOS micromachining." @default.
- W2077459211 created "2016-06-24" @default.
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- W2077459211 date "2009-10-20" @default.
- W2077459211 modified "2023-09-23" @default.
- W2077459211 title "Integrated micromachined thermopile IR detectors with an XeF2dry-etching process" @default.
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- W2077459211 doi "https://doi.org/10.1088/0960-1317/19/12/125003" @default.
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