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- W3104038757 abstract "We fabricated vertical channel thin film transistors (VTFTs) with a channel length of 130 nm using an ALD In-Ga-Zn-O (IGZO) active channel and high-k HfO2gate insulator layers. Solution-processed SiO2thin film, which exhibited an etch selectivity as high as 4.2 to drain electrode of indium-tin oxide, was introduced as a spacer material. For the formation of near-vertical sidewalls of the spacer patterns, the drain and spacer were successively patterned by means of two-step plasma etching technique using Ar/Cl2and Ar/CF4etch gas species, respectively. The SiO2spacer showed smooth surface morphology (Rq = 0.45 nm) and low leakage current component of 10-6A cm-2at 1 MV cm-1, which were suggested to be appropriate for working as spacer and back-channel. The fabricated VTFT showed sound transfer characteristics and negligible shifts in threshold voltage against the bias stresses of +5 and -5 V for 104s, even though there was abnormal increase in off-currents under the positive-bias stress due to the interactions between hydrogen-related defects and carriers. Despite the technical limitations of patterning process, our fabricated prototype IGZO VTFTs showed good operation stability even with an ultra-short channel length of 130 nm, demonstrating the potential of ALD IGZO thin film as an alternative channel for highly-scaled electronic devices." @default.
- W3104038757 created "2020-11-23" @default.
- W3104038757 creator A5033193136 @default.
- W3104038757 creator A5051595825 @default.
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- W3104038757 date "2021-03-30" @default.
- W3104038757 modified "2023-09-29" @default.
- W3104038757 title "Implementation of oxide vertical channel TFTs with sub-150 nm channel length using atomic-layer deposited IGZO active and HfO<sub>2</sub> gate insulator" @default.
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- W3104038757 doi "https://doi.org/10.1088/1361-6528/abcbc4" @default.
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