Invention Application
- Patent Title: METHOD FOR FORMING A FLAT BOTTOM ELECTRODE VIA (BEVA) TOP SURFACE FOR MEMORY
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Application No.: US17537830Application Date: 2021-11-30
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Publication No.: US20220093849A1Publication Date: 2022-03-24
- Inventor: 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
- Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
- Applicant Address: TW Hsin-Chu
- Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
- Current Assignee Address: TW Hsin-Chu
- Main IPC: H01L43/02
- IPC: H01L43/02 ; H01L23/538 ; H01L43/12 ; H01L27/22 ; H01L45/00 ; H01L21/768 ; H01L27/24 ; H01L43/08

Abstract:
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.
Public/Granted literature
- US11751485B2 Flat bottom electrode via (BEVA) top surface for memory Public/Granted day:2023-09-05
Information query
IPC分类: