کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6946108 | 1450522 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Physically-based evaluation of aging contributions in HC/FN-programmed 40Â nm NOR Flash technology
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
سخت افزارها و معماری
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this paper, an in-depth aging assessment for 40Â nm NOR Flash cells, programmed by Hot Carrier (HC) and erased by Fowler-Nordheim (FN) mechanisms, is performed during Program/Erase (P/E) cycling. Firstly, the difficulty of properly analyzing the overall HCÂ +Â FN wear out and the importance of evaluating the different cell characteristic drifts are pointed out. Thus, in order to thoroughly explore the cell degradation, ad-hoc experimental setup and test structures are considered. In particular, using customizable gate patterns during P/E operations, the cell endurance is successfully reproduced on equivalent Flash transistors. Taking advantage of these results and of cell dynamics computation within P/E phases, a fine extraction and separation of electrostatic and cell performance decays within the Programming Window (PW) evolution is presented. Then, using this technique, an accurate physical assessment of cell aging characteristic evolutions under different gate ramp patterns is provided. This attitude is shown to give important guidelines for the optimization of Flash cell endurance performance for a certain initial PW. In particular, the erase pattern is demonstrated not to significantly influence the PW drift, whereas, lowering the ramp speed during the program operation, an important increase of Vth in both states is observed and physically explained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microelectronics Reliability - Volume 79, December 2017, Pages 281-287
Journal: Microelectronics Reliability - Volume 79, December 2017, Pages 281-287
نویسندگان
Giulio Torrente, Jean Coignus, Alexandre Vernhet, Jean-Luc Ogier, David Roy, Gérard Ghibaudo,