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Updated: Jan 23, 2026

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γ線照射によるカーボンナノチューブトランジスタの性能向上

Ke Zhang^1,2, Ningfei Gao^3,4, Jiahao Zhang³

¹Fert Beijing Institute, School of Integrated Circuit Science and Engineering, Beihang University, Beijing, China.

Nature communications

|January 21, 2026

まとめ

高エネルギーガンマ線照射は、リーク電流を低減し、ゲート制御を強化することにより、カーボンナノチューブ電界効果トランジスタを改善します。このブレークスルーは、ポストムーア時代の低電力エレクトロニクスを進歩させます。

科学分野:

材料科学;ナノテクノロジー;電子工学

背景:

先進的なエレクトロニクスには、シリコンの限界を超える性能が必要です。;カーボンナノチューブ電界効果トランジスタ（CNTFET）は優れた性能を提供しますが、界面の問題に悩まされています。;これらの不完全性は、CNTFETにおけるゲート制御の不良と電流リークにつながります。

研究の目的:

CNTFETにおける界面の不完全性を軽減すること。;ゲート制御性とリーク電流を改善すること。;実用的な応用に向けてCNTFETの耐放射線性を向上させること。

主な方法:

高エネルギーガンマ線照射を利用してCNTFETを処理すること。;準ゲートオールアラウンドアーキテクチャを実装すること。;オフ状態電流とオン/オフ比を含むデバイス性能を特徴付けること。

主要な成果:

ガンマ線照射により、オフ状態電流密度が112.2 pA μm^-1に大幅に低減しました。;低電力ターゲットに近い約10⁵のオン/オフ比を達成しました。;準ゲートオールアラウンドアーキテクチャの100 Mrad(Si)までの耐放射線性を実証しました。

結論:

高エネルギーガンマ線照射は、CNTFETを改善するための効果的なファウンドリ互換戦略です。;処理されたCNTFETは、強化された性能と耐放射線性を示します。;このアプローチは、先進的なエレクトロニクスにおけるナノチューブトランジスタの実用的な応用を進歩させます。

キーワード:

カーボンナノチューブ電界効果トランジスタガンマ線照射リーク電流ゲート制御耐放射線性ポストムーアエレクトロニクス材料科学ナノテクノロジー電子工学

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