发明授权
- 专利标题: Method for manufacturing ferroelectric capacitor and method for manufacturing ferroelectric memory
- 专利标题(中): 铁电电容器的制造方法及其制造方法
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申请号: US08988687申请日: 1997-12-11
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公开(公告)号: US06297085B1公开(公告)日: 2001-10-02
- 发明人: Katsuhiro Aoki , Yukio Fukuda , Ikuko Murayama , Ken Numata , Akitoshi Nishimura
- 申请人: Katsuhiro Aoki , Yukio Fukuda , Ikuko Murayama , Ken Numata , Akitoshi Nishimura
- 主分类号: H01L218242
- IPC分类号: H01L218242
摘要:
To provide a method that can be used to form a high-qualility ferroelectric film by forming good nuclei when using the sputtering method to manufacture a PZT capacitor or other forroelectric capacitors using Ir or other electrode substances in addition to Pt for the electrode. In the method for manufacturing a PZT ferroelectric capacitor CAP, after titanium film 31 is deposited on Ir electrode 6, lead oxide 32 is deposited at a substrate temperature higher than the crystallization temperature of lead titanate using the sputtering method. Lead zirconate titanate 34 is then deposited at a substrate temperature higher than the aforementioned substrate temperature using the sputtering temperature. Afterwards, a heat treatment of the deposited film is performed to produce PZT film 17.
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