The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 2021
Filed:
Jun. 30, 2020
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Sheng-Chau Chen, Tainan, TW;
Cheng-Tai Hsiao, Tainan, TW;
Cheng-Yuan Tsai, Chu-Pei, TW;
Hsun-Chung Kuang, Hsinchu, TW;
Yao-Wen Chang, Taipei, TW;
Taiwan Semiconductor Manufacturing Company, Ltd., Hsinchu, TW;
Abstract
A memory cell with an etch stop layer is provided. The memory cell comprises a bottom electrode disposed over a substrate. A switching dielectric is disposed over the bottom electrode and having a variable resistance. A top electrode is disposed over the switching dielectric. A sidewall spacer layer extends along sidewalls of the bottom electrode, the switching dielectric, and the top electrode and an upper surface of a lower dielectric layer. A lower etch stop layer is disposed over the lower dielectric layer and lining an outer sidewall of the sidewall spacer layer. The the sidewall spacer layer separates the lower etch stop layer from the lower dielectric layer.