Impact of the Guard Rings on Self-Induced Signal and Leakage Current in Trench-Isolated LowGain Avalanche Diodes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F10974938%3A_____%2F25%3A25_88_05" target="_blank" >RIV/10974938:_____/25:25_88_05 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3390/s25103006" target="_blank" >https://doi.org/10.3390/s25103006</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/s25103006" target="_blank" >10.3390/s25103006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of the Guard Rings on Self-Induced Signal and Leakage Current in Trench-Isolated LowGain Avalanche Diodes

Popis výsledku v původním jazyce

In this contribution, we explored the interplay of guard ring (GR) configuration and isolation structures, as well as irradiation effects, which all together create a rich landscape of phenomena such as self-induced signals ("ghosts") in trench-isolated Low-Gain Avalanche Diodes (TI-LGADs). The ghost effect is related to the increased surface current due to presence of SiO2 trenches (and defects) in studied diodes, but it is also affected by interplay between the guard ring(s) and the n+ bias ring, implanted in inter-pixel region of these devices. In double-trenched sensors, the n+ bias ring is inserted in between the two trenches. We present the investigation on the role of these structures on the self-induced signals in trench-isolated sensors from two different productions (RD50 and AIDAinnova). The sensors from the first production have multiple guard rings, whereas the second type of devices feature only one. Detailed examination of the ghost effect and leak current was performed when guard rings were left floating or connected to the pixels (brought to the same potential). The results show that guard ring configuration in trenched sensors can be critical for the leak current and the presence of a ghost signal. To our best knowledge, the latter problem has not been investigated yet.

Název v anglickém jazyce

Impact of the Guard Rings on Self-Induced Signal and Leakage Current in Trench-Isolated LowGain Avalanche Diodes

Popis výsledku anglicky

In this contribution, we explored the interplay of guard ring (GR) configuration and isolation structures, as well as irradiation effects, which all together create a rich landscape of phenomena such as self-induced signals ("ghosts") in trench-isolated Low-Gain Avalanche Diodes (TI-LGADs). The ghost effect is related to the increased surface current due to presence of SiO2 trenches (and defects) in studied diodes, but it is also affected by interplay between the guard ring(s) and the n+ bias ring, implanted in inter-pixel region of these devices. In double-trenched sensors, the n+ bias ring is inserted in between the two trenches. We present the investigation on the role of these structures on the self-induced signals in trench-isolated sensors from two different productions (RD50 and AIDAinnova). The sensors from the first production have multiple guard rings, whereas the second type of devices feature only one. Detailed examination of the ghost effect and leak current was performed when guard rings were left floating or connected to the pixels (brought to the same potential). The results show that guard ring configuration in trenched sensors can be critical for the leak current and the presence of a ghost signal. To our best knowledge, the latter problem has not been investigated yet.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Sensors

ISSN

—

e-ISSN

1424-8220

Svazek periodika

25

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

14

Strana od-do

3006

Kód UT WoS článku

001496975200001

EID výsledku v databázi Scopus

2-s2.0-105006678761