发明授权
- 专利标题: Semiconductor device with perovskite capacitor
- 专利标题(中): 具有钙钛矿电容器的半导体器件
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申请号: US10834928申请日: 2004-04-30
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公开(公告)号: US07122851B2公开(公告)日: 2006-10-17
- 发明人: Hiroshi Itokawa , Koji Yamakawa , Katsuaki Natori
- 申请人: Hiroshi Itokawa , Koji Yamakawa , Katsuaki Natori
- 申请人地址: JP Tokyo
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人地址: JP Tokyo
- 代理机构: Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权: JP2003-129072 20030507
- 主分类号: H01L29/76
- IPC分类号: H01L29/76 ; H01L29/94 ; H01L31/062 ; H01L31/113 ; H01L31/119
摘要:
A semiconductor device comprising a semiconductor substrate, and a capacitor provided above the semiconductor substrate, and including a bottom electrode, a top electrode and a dielectric film between the bottom and top electrodes, the bottom electrode including a conductive film selected from a noble metal film and a noble metal oxide film, a metal oxide film having a perovskite structure, provided between the dielectric film and the conductive film, expressed by ABO3, and containing first metal element as B-site element, and a metal film provided between the conductive film and the metal oxide film, and containing second metal element which is B-site element of a metal oxide having a perovskite structure, a decrease of Gibbs free energy when the second metal element forms oxide being larger than that when the first metal element forms oxide, a thickness of the metal oxide film being 5 nm or less.
公开/授权文献
- US20050001251A1 Semiconductor device 公开/授权日:2005-01-06
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