- 专利标题: Method for forming a flat bottom electrode via (BEVA) top surface for memory
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申请号: US16939583申请日: 2020-07-27
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公开(公告)号: US11201281B2公开(公告)日: 2021-12-14
- 发明人: Hsia-Wei Chen , Chih-Yang Chang , Chin-Chieh Yang , Jen-Sheng Yang , Sheng-Hung Shih , Tung-Sheng Hsiao , Wen-Ting Chu , Yu-Wen Liao , I-Ching Chen
- 申请人: Taiwan Semiconductor Manufacturing Co., Ltd.
- 申请人地址: TW Hsin-Chu
- 专利权人: Taiwan Semiconductor Manufacturing Co., Ltd.
- 当前专利权人: Taiwan Semiconductor Manufacturing Co., Ltd.
- 当前专利权人地址: TW Hsin-Chu
- 代理机构: Eschweiler & Potashnik, LLC
- 主分类号: H01L43/02
- IPC分类号: H01L43/02 ; H01L23/538 ; H01L43/12 ; H01L27/22 ; H01L45/00 ; H01L21/768 ; H01L27/24 ; H01L43/08
摘要:
Various embodiments of the present application are directed towards a method for forming a flat via top surface for memory, as well as an integrated circuit (IC) resulting from the method. In some embodiments, an etch is performed into a dielectric layer to form an opening. A liner layer is formed covering the dielectric layer and lining the opening. A lower body layer is formed covering the dielectric layer and filling a remainder of the opening over the liner layer. A top surface of the lower body layer and a top surface of the liner layer are recessed to below a top surface of the dielectric layer to partially clear the opening. A homogeneous upper body layer is formed covering the dielectric layer and partially filling the opening. A planarization is performed into the homogeneous upper body layer until the dielectric layer is reached.
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