发明授权
US06746876B2 Capacitor manufacturing method having dielectric formed before electrode
失效
在电极之前形成电介质的电容器制造方法
- 专利标题: Capacitor manufacturing method having dielectric formed before electrode
- 专利标题(中): 在电极之前形成电介质的电容器制造方法
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申请号: US10310765申请日: 2002-12-06
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公开(公告)号: US06746876B2公开(公告)日: 2004-06-08
- 发明人: Hiromi Itoh , Yoshikazu Tsunemine , Keiichiro Kashihara , Akie Yutani , Tomonori Okudaira
- 申请人: Hiromi Itoh , Yoshikazu Tsunemine , Keiichiro Kashihara , Akie Yutani , Tomonori Okudaira
- 优先权: JP2002-164765 20020605
- 主分类号: H01L218242
- IPC分类号: H01L218242
摘要:
A method for manufacturing a capacitor is provided which can form a lower electrode having a high aspect ratio without suffering deterioration of the capacitor electric characteristics even when a platinum-group metal is adopted as the material of the lower electrode and a metal oxide having a high dielectric constant is adopted as the material of the dielectric film. Holes (8) that reach contact plugs (2) are formed in an insulating film (7). Then a dielectric film (9) is formed on the surfaces of the holes (8). Next the dielectric film (9) on the bottoms of the holes (8) are etched away to form holes (18) reaching the contact plugs (2). Lower electrodes (11) are then formed to fill the holes (8) and (18).
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