Abstract:A triple p-n junction Si photodetector using 0.25-μm standard CMOS process at 650-and 850-nm wavelengths is presented and investigated. Triple p-n junctions are formed vertically by n +-implant/p-well (N+/HVPW), p-well/n +-buried layer (HVPW/NBL), and n +-buried layer/p-substrate (NBL/P-sub) junctions to attain a wavelength-dependent response. The responsivity and pulse response were characterised in different bias schemes. Measured photocurrents from HVPW/NBL and NBL/P-sub junctions under reverse biasing and … Show more
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