Thermal-stability improvement of LaON thin film formed using nitrogen radicals

S. Sato, K. Tachi, K. Kakushima, P. Ahmet, K. Tsutsui, N. Sugii, T. Hattori, H. Iwai

研究成果: Article査読

11 被引用数 (Scopus)

抄録

This work reports the influence of nitridation on structural and electrical properties of La2O3 gate dielectric films. The issue of La2O3 is EOT increase after high temperature post metarization annealing (PMA). To overcome this problem, we incorporated nitrogen in La2O3. The EOT increase on the TaN/LaON and W/LaON structure is reduced compared with that on the W/La2O3 structure. This is due to nitrogen in LaON and SiNx-rich interfacial layer which seems to remain after high temperature annealing. W/LaON nMOSFET is also successfully fabricated. Peak electron mobility of 96.2 cm2/V s was obtained.

本文言語English
ページ(範囲)1894-1897
ページ数4
ジャーナルMicroelectronic Engineering
84
9-10
DOI
出版ステータスPublished - 2007 9月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 原子分子物理学および光学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 電子工学および電気工学

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