Systematic View of CAAC‐IGZO and Other Crystalline IGZO Thin Films

doi:10.1002/9781119247289.ch2

Physics and Technology of Crystalline Oxide Semiconductor CAAC‐IGZO 2016

DOI: 10.1002/9781119247289.ch2

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Systematic View of CAAC‐IGZO and Other Crystalline IGZO Thin Films

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2021

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Systematic Study on the Amorphous, C-Axis-Aligned Crystalline, and Protocrystalline Phases in In–Ga–Zn Oxide Thin-Film Transistors

Glushkova

Dekkers

Nag

et al. 2021

ACS Appl. Electron. Mater.

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In an effort to fabricate In–Ga–Zn oxide (IGZO) thin-film transistors (TFTs) that combine high performance and high stability, we optimize sputtering conditions to create devices based on different IGZO phases: amorphous, c-axis-aligned crystalline (CAAC), and a transition between them, which is introduced here as protocrystalline IGZO. For this, we study the performance of TFTs based on thin films of IGZO sputtered at different substrate temperatures T sub and oxygen flow ratios R O2 . While T sub is the principal phase-determining parameter, R O2 can be further optimized to enhance IGZO TFT characteristics. For both amorphous IGZO and CAAC IGZO, the best TFT performance and the best TFT bias stress stability are found under different sputtering conditions. In contrast, the protocrystalline IGZO shows a convergence of the highest TFT performance and the best bias stress stability, observed for an IGZO film sputtered at T sub = 200 °C and R O2 = 20%.

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Systematic Study on the Amorphous, C-Axis-Aligned Crystalline, and Protocrystalline Phases in In–Ga–Zn Oxide Thin-Film Transistors

Glushkova

Dekkers

Nag

et al. 2021

ACS Appl. Electron. Mater.

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show abstract

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Systematic View of CAAC‐IGZO and Other Crystalline IGZO Thin Films

Cited by 1 publication

References 39 publications

Systematic Study on the Amorphous, C-Axis-Aligned Crystalline, and Protocrystalline Phases in In–Ga–Zn Oxide Thin-Film Transistors

Systematic Study on the Amorphous, C-Axis-Aligned Crystalline, and Protocrystalline Phases in In–Ga–Zn Oxide Thin-Film Transistors

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