全形無形酸化物透明で柔軟な薄膜トランジスタ. 二層ゲートダイエレクトリックの有効性
Jun Liu1, D Bruce Buchholz, Jonathan W Hennek
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, USA.
Journal of the American Chemical Society
|August 12, 2010
まとめ
研究者らは,無形金属酸化物を用いて柔軟で透明な薄膜トランジスタを開発した. これらの装置は,新しい2層ゲート介電器と無形亜鉛-インジウム-亜鉛酸化物を利用し,性能と機械的な柔軟性を向上させます.
科学分野:
- マテリアルサイエンス 材料科学
- 電子工学 電子工学 エンジニアリング
- オプトエレクトロニクス (光電子機器)
背景:
- 薄膜トランジスタ (TF-TFT) は,柔軟な電子機器に不可欠です.
- 光学的な透明性と機械的な柔軟性を兼ね備えたTF-TFTを開発することは,依然として課題です.
- アモルフ酸化物半導体は,高性能の透明な電子機器の可能性を秘めています.
研究 の 目的:
- 光学的に透明で機械的に柔軟なTF-TFTを,無形金属酸化物フィルムのみを用いて製造する.
- 新しい無形なTa(2) O(5) /SiO(x) 二層ゲートダイエレクトリックの性能を調査する.
- 半導体チャネルと導体電極の両方として無形亜鉛・インジウム・亜鉛酸化物 (a-ZITO) を利用する.
主な方法:
- プラスチック基板上のTF-TFTの製造.
- アモルフなTa{2}O{5}と蒸気で堆積したSiO{x} (v-SiO{x}) を含む二重層ゲート介電器の構築.
- 半導体チャネルと透明な酸化物導体 (TOC) 電極の a-ZITO の使用.
主要な成果:
- a-Ta ((2) O ((5) /v-SiO ((x)) 二層介電器は,インターフェイスの互換性とデバイスの性能を向上させました.
- フィールド・エフェクトによって,約20cm(2)/V x s.の移動性を達成した.
- 高いオン電流 (>10(-4) A) と現在のオンオフ比率 (>10(5) を低動作電圧 (約) で実証した. 4.0 V) となっている.
結論:
- 開発された全無形酸化物TF-TFTは,優れた光学透明性と機械的柔軟性を示しています.
- 新しい2層ゲート介電設計は,単層介電と比較してデバイスの性能を大幅に改善します.
- これらの発見は,高度な柔軟で透明な電子アプリケーションの道を開く.
関連する概念動画
01:29Field Effect Transistor
Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
01:25MOS Capacitor
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
01:16MOSFET
The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
In an n-MOSFET, the structure includes n-type source and drain...
01:22MOSFET: Enhancement Mode
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...