title: A hot hole-programmed and low-temperature-formed SONOS flash memory.
abstract: In this study, a high-performance TixZrySizO flash memory is demonstrated using a sol-gel spin-coating method and formed under a low annealing temperature. The high-efficiency charge storage layer is formed by depositing a well-mixed solution of titanium tetrachloride, silicon tetrachloride, and zirconium tetrachloride, followed by 60 s of annealing at 600°C. The flash memory exhibits a noteworthy hot hole trapping characteristic and excellent electrical properties regarding memory window, program/erase speeds, and charge retention. At only 6-V operation, the program/erase speeds can be as fast as 120:5.2 μs with a 2-V shift, and the memory window can be up to 8 V. The retention times are extrapolated to 106 s with only 5% (at 85°C) and 10% (at 125°C) charge loss. The barrier height of the TixZrySizO film is demonstrated to be 1.15 eV for hole trapping, through the extraction of the Poole-Frenkel current. The excellent performance of the memory is attributed to high trapping sites of the low-temperature-annealed, high-κ sol-gel film.
authors.affiliation: Graduate Institute of Biomedical Materials and Tissue Engineering, College of Oral Medicine, Taipei Medical University, Taipei 110, Taiwan. halfccwu@tmu.edu.tw.
authors.forename: Yuan-Ming
authors.initials: YM
authors.lastname: Chang
authors.forename: Wen-Luh
authors.initials: WL
authors.lastname: Yang
authors.forename: Sheng-Hsien
authors.initials: SH
authors.lastname: Liu
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Hsiao
authors.forename: Jia-Yo
authors.initials: JY
authors.lastname: Wu
authors.forename: Chi-Chang
authors.initials: CC
authors.lastname: Wu
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