• Complex
  • Title
  • Keyword
  • Abstract
  • Scholars
  • Journal
  • ISSN
  • Conference
成果搜索

author:

Wu, Huan (Wu, Huan.) [1] | Ruan, Dun-Bao (Ruan, Dun-Bao.) [2] | Chang-Liao, Kuei-Shu (Chang-Liao, Kuei-Shu.) [3]

Indexed by:

EI

Abstract:

A HfO2/ZrO2/HfO2 (HZH) high-k stack with adequate ZrO2 thickness ratio is proposed as dielectric in metal-insulator-metal (MIM) capacitor for dynamic random access memory (DRAM) applications. The dielectric constant (k) of 43 is achieved when the ZrO2 thickness ratio is 73%. An equivalent oxide thickness (EOT) of 0.46 nm and leakage current density Jg of 9.4× 10-5 A/cm2 are simultaneously achieved with a total HZH physical thickness Tox of 5 nm. The leakage current may be caused by the interface traps at the HZH multi-interface structure, as well as the oxygen vacancies inside HfO2 and ZrO2. To suppress Jg, a NH3 plasma treatment was in situ conducted during atomic layer deposition (ALD) processes of HZH deposition. Through nitrogen incorporation with in situ NH3 plasma treatment, the oxygen vacancies can be passivated, and Zr-O-N bonds would be formed at the interface to suppress the formation of interface traps. The sample with an in situ NH3 plasma treatment at the interface between ZrO2 and top HfO2 (ZN) can obtain a reduction in leakage current density by 48% when compared with those without ZN, while maintaining the capacitance density (C) at a similar value of around 7.4μ F/cm2. The approaches of HZH stack and in situ plasma treatment for MIM capacitor are promising to the cell in DRAM technology. © 1963-2012 IEEE.

Keyword:

Capacitor bank Critical current density (superconductivity) Hafnium oxides Hard facing High-k dielectric Leakage currents Metal insulator boundaries MIM devices Plasma applications Semiconductor insulator boundaries Supercapacitor Titanium nitride

Community:

  • [ 1 ] [Wu, Huan]National Tsing Hua University, College of Semiconductor Research, Hsinchu; 300, Taiwan
  • [ 2 ] [Ruan, Dun-Bao]Fuzhou University, College of Physics and Information Engineering, Department of Microelectronics, Fujian, Fuzhou; 350025, China
  • [ 3 ] [Chang-Liao, Kuei-Shu]National Tsing Hua University, College of Semiconductor Research, Department of Engineering and System Science, Hsinchu; 300, Taiwan

Reprint 's Address:

Email:

Show more details

Related Keywords:

Related Article:

Source :

IEEE Transactions on Electron Devices

ISSN: 0018-9383

Year: 2024

Issue: 10

Volume: 71

Page: 6027-6031

2 . 9 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 3

Affiliated Colleges:

Online/Total:395/10025090
Address:FZU Library(No.2 Xuyuan Road, Fuzhou, Fujian, PRC Post Code:350116) Contact Us:0591-22865326
Copyright:FZU Library Technical Support:Beijing Aegean Software Co., Ltd. 闽ICP备05005463号-1