Invention Grant
- Patent Title: Method of manufacturing a ferroelectric capacitor and a ferroelectric capacitor
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Application No.: US13110510Application Date: 2011-05-18
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Publication No.: US08906704B2Publication Date: 2014-12-09
- Inventor: Wensheng Wang
- Applicant: Wensheng Wang
- Applicant Address: JP Yokohama
- Assignee: Fujitsu Semiconductor Limited
- Current Assignee: Fujitsu Semiconductor Limited
- Current Assignee Address: JP Yokohama
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2010-175726 20100804
- Main IPC: H01L27/115
- IPC: H01L27/115 ; H01L49/02

Abstract:
A lower electrode film is formed above a substrate. A ferroelectric film is formed above the lower electrode film. An amorphous intermediate film of a perovskite-type conductive oxide is formed above the ferroelectric film. A first upper electrode film comprising oxide of at least one metal selected from a group of Pt, Pd, Rh, Ir, Ru, and Os is formed on the intermediate film. The intermediate film is crystallized by carrying out a first heat treatment in an atmosphere containing an oxidizing gas after the formation of the first upper electrode film. After the first heat treatment, a second upper electrode film comprising oxide of at least one metal selected from a group of Pt, Pd, Rh, Ir, Ru, and Os is formed on the first upper electrode film, at a temperature lower than the growth temperature for the first upper electrode film.
Public/Granted literature
- US20120032300A1 METHOD OF MANUFACTURING A FERROELECTRIC CAPACITOR AND A FERROELECTRIC CAPACITOR Public/Granted day:2012-02-09
Information query
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