Radiation Hardness of Modern Photogate Pixels Under Total Ionizing Dose: Impact of Pixel Pitch and Electron or Hole Collection

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-10 DOI:10.1109/TNS.2024.3426077

Victor Malherbe;Olivier Nier;Soilihi Moindjie;Philippe Roche;François Roy;Arnaud Tournier

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Abstract

Gamma and X-ray irradiation results are reported on several variants of deep-trench photogate research and development pixels from STMicroelectronics. Dark current performances are compared for electron and hole-collecting pixels (n, p-type) of 2 and

$1~{\mu }$

m pitch. Total ionizing dose (TID) results on

$2~{\mu }$

m p-type photogates are generally consistent with previous studies, showing state-of-the-art radiation tolerance at 70 kGy (Si);

$1~{\mu }$

m n-type pixels are found to quickly degrade under radiation, in line with expectations;

$1~{\mu }$

m p-type photogates exhibit very promising radiation hardness, improving on the

$2~{\mu }$

m p-type results by more than two orders of magnitude, with a dark current below 50 h+/s after 40 kGy gamma rays or 64 kGy (Si) X-rays.

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现代光栅像素在总电离剂量下的辐射硬度：像素间距和电子或空穴收集的影响

报告了意法半导体公司深沟光栅研发像素的几种变体的伽马射线和 X 射线辐照结果。比较了间距为 2 和 1~{\mu }$ m 的电子和空穴收集像素（n 型、p 型）的暗电流性能。2~{\mu }$ m p 型光电元件的总电离剂量 (TID) 结果与之前的研究基本一致，显示出 70 kGy（硅）的最先进辐射耐受性；1~{\mu }$ m n 型像素在辐射下会迅速衰减，符合预期； 1~{\mu }$ m p 型光栅表现出非常好的辐射硬度，比 2~{\mu }$ m p 型的结果提高了两个数量级以上，在 40 kGy 伽马射线或 64 kGy（硅）X 射线之后，暗电流低于 50 h+/s。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.