講演抄録/キーワード |
講演名 |
2011-07-04 10:00
コンダクタンス法を用いたHfO2/In0.53Ga0.47Asの界面解析 ○ザデ ダリューシュ・細井隆司・アヘメト パルハット・角嶋邦之・筒井一生・西山 彰・杉井信之・名取研二・服部健雄・岩井 洋(東工大) SDM2011-53 エレソ技報アーカイブへのリンク:SDM2011-53 |
抄録 |
(和) |
(まだ登録されていません) |
(英) |
The changes in electrical characteristics of W/HfO2or La2O3/ In0.53Ga0.47As capacitors by wet chemical treatment before or controlling the substrate temperature during oxide deposition were investigated. HMDS was used as a surface passivator and compared to widely-used sulfur based passivation. Using HMDS resulted in reduced frequency dispersion and interface state densities of W/ La2O3/ In0.53Ga0.47As capacitors without sacrificing capacitance value in accumulation condition. The effects of controlling InGaAs substrate temperature during electron beam deposition of HfO2 on electrical characteristics of W/HfO2/n-In0.53Ga0.47As capacitors are investigated. It is found that by depositing a thin HfO2 layer at the interface when substrate temperature is raised to 300 oC, frequency dispersion at depletion and accumulation conditions is reduced and interface state density is lowered regardless of the total HfO2 thickness. The frequency dispersion in accumulation was investigated through conductance method in various temperatures. A model based on traps residing within the bulk of the semiconductor was proposed which could explain the dispersive nature of capacitance in accumulation. |
キーワード |
(和) |
/ / / / / / / |
(英) |
High-k / InGaAs / Interface state density / bulk trap / frequency dispersion / / / |
文献情報 |
信学技報, vol. 111, no. 114, SDM2011-53, pp. 17-22, 2011年7月. |
資料番号 |
SDM2011-53 |
発行日 |
2011-06-27 (SDM) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SDM2011-53 エレソ技報アーカイブへのリンク:SDM2011-53 |