Drift Field Implementation in Large Pinned Photodiodes for Improved Charge Transfer Speed

Autor: Donald B. Hondongwa, Eric R. Fossum
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: IEEE Journal of the Electron Devices Society, Vol 6, Pp 413-419 (2018)
Druh dokumentu: article
ISSN: 2168-6734
DOI: 10.1109/JEDS.2018.2792311
Popis: We present a methodology for generating built-in drift fields in large photodiodes. With the aid of TCAD we demonstrate how non-uniform doping profiles can be implemented in a standard CMOS process using a single additional mask and controlled using the implant conditions and mask geometry. We demonstrate that the resulting doping profile creates a built-in drift field and simulates the effect of the drift field on the charge transfer speed. We show that implementing a drift field can improve charge transfer characteristics of the photodiode.
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