Invention Grant
- Patent Title: DRAM MIM capacitor using non-noble electrodes
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Application No.: US14599843Application Date: 2015-01-19
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Publication No.: US09281357B2Publication Date: 2016-03-08
- Inventor: Hanhong Chen , David Chi , Imran Hashim , Mitsuhiro Horikawa , Sandra G. Malhotra
- Applicant: Intermolecular, Inc. , Elpida Memory, Inc
- Applicant Address: US CA San Jose JP Tokyo
- Assignee: Intermolecular, Inc.,Elpida Memory, Inc.
- Current Assignee: Intermolecular, Inc.,Elpida Memory, Inc.
- Current Assignee Address: US CA San Jose JP Tokyo
- Main IPC: H01L49/02
- IPC: H01L49/02 ; H01L27/108

Abstract:
A method for forming a capacitor stack includes forming a first bottom electrode layer including a conductive metal nitride material. A second bottom electrode layer is formed above the first bottom electrode layer. The second bottom electrode layer includes a conductive metal oxide material, wherein the crystal structure of the conductive metal oxide material promotes a desired high-k crystal phase of a subsequently deposited dielectric layer. A dielectric layer is formed above the second bottom electrode layer. Optionally, an oxygen-rich metal oxide layer is formed above the dielectric layer. Optionally, a third top electrode layer is formed above the oxygen-rich metal oxide layer. The third top electrode layer includes a conductive metal oxide material. A fourth top electrode layer is formed above the third top electrode layer. The fourth top electrode layer includes a conductive metal nitride material.
Public/Granted literature
- US20150137315A1 DRAM MIM Capacitor Using Non-Noble Electrodes Public/Granted day:2015-05-21
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