Reliability of a 90nm Embedded Multi-time Programmable Logic NVM Cells Using Work-function Engineered Tunneling Device

Wang, Bin; Ma, Yanjun; Horch, A.; Paulsen, R.

doi:10.1109/relphy.2007.370001

2007 IEEE International Reliability Physics Symposium Proceedings. 45th Annual 2007

DOI: 10.1109/relphy.2007.370001

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Reliability of a 90nm Embedded Multi-time Programmable Logic NVM Cells Using Work-function Engineered Tunneling Device

Bin Wang¹,

Yanjun Ma²,

A. Horch³

et al.

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Advantage of Floating Gate B4-Flash over Retention Reliability after Cycling - Characterization by Variation of Transconductance

Shukuri¹,

Ajika²,

Shimizu³

et al. 2008

2008 Joint Non-Volatile Semiconductor Memory Workshop and International Conference on Memory Technology and Design

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This paper describes the reliability characteristics evaluation results of floating gate type B4-Flash (Back Bias assisted Band-to-Band tunneling induced Hot Electron injection Flash) with statistics. Data retention reliability of B4-Flash with N+gate and P-channel memory cell utilizing B4-HE program and FN channel erase is evaluated extensively under bake temperature of -24C to 250C up to 7000hrs after 1k to 1M E/W cycles, by novel evaluation method of correlating Vt shifts and gm variations. No leaky bit failure can be seen in B4-Flash with thicker than 9nm tunnel oxide and the Vt shifts during retention bake is associated with electron detrapping and move into floating gate from tunnel oxide, which is verified by correlating Vt shifts and gm variations. Tunnel oxide thickness dependence on retention reliability is also studied and confirmed to have excellent retention characteristics under 150C after 100k cycling. In the case of 7nm tunnel oxide thickness device, some leaky bits due to stress induced leakage current (SILC) can be seen even in B4-Flash, nevertheless number of tail bits is remarkably reduced compared with that of conventional N+gate, N-channel NOR flash. According to all the obtained results show that B4-Flash can achieve excellent retention reliability after cycling with high speed programmability.

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Advantage of Floating Gate B4-Flash over Retention Reliability after Cycling - Characterization by Variation of Transconductance

Shukuri¹,

Ajika²,

Shimizu³

et al. 2008

2008 Joint Non-Volatile Semiconductor Memory Workshop and International Conference on Memory Technology and Design

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show abstract

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Reliability of a 90nm Embedded Multi-time Programmable Logic NVM Cells Using Work-function Engineered Tunneling Device

Cited by 1 publication

References 0 publications

Advantage of Floating Gate B4-Flash over Retention Reliability after Cycling - Characterization by Variation of Transconductance

Advantage of Floating Gate B4-Flash over Retention Reliability after Cycling - Characterization by Variation of Transconductance

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