Metal-oxide readout electronics based on Indium-Gallium-Zinc-Oxide and Indium-Tin-Zinc-Oxide for in-panel fingerprint detection application
conference paper
This work describes integrated readout electronics for on-panel fingerprint detection, focusing on two key building blocks: charge sense amplifier (CSA) and analog-to-digital converter (ADC). The CSA has been realized in a dual-gate self-aligned IGZO thin-film transistor (TFT) technology with channel length downsizing to 3µm, enabling 1.3mm bezel size for the peripheral readout electronics and 1fps readout of a 1-Mpixel 500dpi sensor array. The ADC has been realized in two different transistor technologies, IGZO and Indium-Tin-Zinc-Oxide (ITZO). The ITZO ADC achieves a sampling rate of 1kS/s, which is 7.5x faster compared to the IGZO ADC, due to the larger mobility of ITZO.
TNO Identifier
955191
ISSN
0097966X
Publisher
Blackwell Publishing Ltd
Source title
Digest of Technical Papers - SID International Symposium, SID Symposium, Seminar, and Exhibition 2019, Display Week 2019, 12 May 2019 through 17 May 2019
Editor(s)
Fitzsimmons, K.J.
Pages
95-98
Files
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