Invention Grant
- Patent Title: Three-dimensional stackable ferroelectric random access memory devices and methods of forming
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Application No.: US17018139Application Date: 2020-09-11
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Publication No.: US11552103B2Publication Date: 2023-01-10
- Inventor: Meng-Han Lin , Bo-Feng Young , Han-Jong Chia , Sheng-Chen Wang , Feng-Cheng Yang , Sai-Hooi Yeong , Yu-Ming Lin
- Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
- Applicant Address: TW Hsinchu
- Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
- Current Assignee Address: TW Hsinchu
- Agency: Slater Matsil, LLP
- Main IPC: H01L27/11597
- IPC: H01L27/11597 ; G11C7/18 ; G11C11/14 ; H01L27/11587

Abstract:
A method of forming a ferroelectric random access memory (FeRAM) device includes: forming a first layer stack and a second layer stack successively over a substrate, where the first layer stack and the second layer stack have a same layered structure that includes a layer of a first electrically conductive material over a layer of a first dielectric material, where the first layer stack extends beyond lateral extents of the second layer stack; forming a trench that extends through the first layer stack and the second layer stack; lining sidewalls and a bottom of the trench with a ferroelectric material; conformally forming a channel material in the trench over the ferroelectric material; filling the trench with a second dielectric material; forming a first opening and a second opening in the second dielectric material; and filling the first opening and the second opening with a second electrically conductive material.
Public/Granted literature
- US20210408042A1 THREE-DIMENSIONAL STACKABLE FERROELECTRIC RANDOM ACCESS MEMORY DEVICES AND METHODS OF FORMING Public/Granted day:2021-12-30
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