Nonvolatile memories （NVMs） with triple layers of silicon nanocrystals were fabricated with conventional CMOS technology. This paper explores the program/erase performance and reliability of NVMs with three layers o...Nonvolatile memories （NVMs） with triple layers of silicon nanocrystals were fabricated with conventional CMOS technology. This paper explores the program/erase performance and reliability of NVMs with three layers of nanocrystais. The results indicate that the nanocrystals in the triple-layer nanocrystal NVM （NCNVM） are difficult to fully charge during the programming process. The programming speed of the triple-layer NCNVMs is quicker than that of single-layer NCNVMs, which means that the second and third layers of nanocrystals in the triple-layer NCNVM affect the charge of the first layer nanocrystals. Reliability tests show that the memory window has little degradation after 1× 10^4 cycles.展开更多
The erase voltage impact on the 0.18μm triple self-aligned split-gate flash endurance is studied.An optimized erase voltage is necessary in order to achieve the best endurance.A lower erase voltage can cause more cel...The erase voltage impact on the 0.18μm triple self-aligned split-gate flash endurance is studied.An optimized erase voltage is necessary in order to achieve the best endurance.A lower erase voltage can cause more cell current degradation by increasing its sensitivity to the floating gate voltage drop,which is induced by tunnel oxide charge trapping during program/erase cycling.A higher erase voltage also aggravates the endurance degradation by introducing select gate oxide charge trapping.A progressive erase voltage method is proposed and demonstrated to better balance the two degradation mechanisms and thus further improve endurance performance.展开更多
Xinyang,a city in central China’s Henan Province,is well known for the green tea it produces called Xinyang maojian,a rare brew that is much in demand.Recently, however,the city made headlines for an en- tirely diffe...Xinyang,a city in central China’s Henan Province,is well known for the green tea it produces called Xinyang maojian,a rare brew that is much in demand.Recently, however,the city made headlines for an en- tirely different reason—a new set of policies to take care of its women.展开更多
基金Supported by the Basic Research Foundation of Tsinghua National Laboratory for Information Science and Technology (TNList)
文摘Nonvolatile memories （NVMs） with triple layers of silicon nanocrystals were fabricated with conventional CMOS technology. This paper explores the program/erase performance and reliability of NVMs with three layers of nanocrystais. The results indicate that the nanocrystals in the triple-layer nanocrystal NVM （NCNVM） are difficult to fully charge during the programming process. The programming speed of the triple-layer NCNVMs is quicker than that of single-layer NCNVMs, which means that the second and third layers of nanocrystals in the triple-layer NCNVM affect the charge of the first layer nanocrystals. Reliability tests show that the memory window has little degradation after 1× 10^4 cycles.
文摘The erase voltage impact on the 0.18μm triple self-aligned split-gate flash endurance is studied.An optimized erase voltage is necessary in order to achieve the best endurance.A lower erase voltage can cause more cell current degradation by increasing its sensitivity to the floating gate voltage drop,which is induced by tunnel oxide charge trapping during program/erase cycling.A higher erase voltage also aggravates the endurance degradation by introducing select gate oxide charge trapping.A progressive erase voltage method is proposed and demonstrated to better balance the two degradation mechanisms and thus further improve endurance performance.
文摘Xinyang,a city in central China’s Henan Province,is well known for the green tea it produces called Xinyang maojian,a rare brew that is much in demand.Recently, however,the city made headlines for an en- tirely different reason—a new set of policies to take care of its women.
