A three-dimensional finite element model for phase change random access memory （PCRAM） is established for comprehensive electrical and thermal analysis during SET operation. The SET behaviours of the heater additio...A three-dimensional finite element model for phase change random access memory （PCRAM） is established for comprehensive electrical and thermal analysis during SET operation. The SET behaviours of the heater addition structure （HS） and the ring-type contact in bottom electrode （RIB） structure are compared with each other. There are two ways to reduce the RESET current, applying a high resistivity interracial layer and building a new device structure. The simulation resuIts indicate that the variation of SET current with different power reduction ways is little. This study takes the RESET and SET operation current into consideration, showing that the RIB structure PCRAM cell is suitable for future devices with high heat efficiency and high-density, due to its high heat efficiency in RESET operation.展开更多
Capillary electrophoresis-mass spectrometry（CE-MS） is a powerful separation and analytical technique in the field of analytical chemistry. This review provides an update of instrumentation developments in the method...Capillary electrophoresis-mass spectrometry（CE-MS） is a powerful separation and analytical technique in the field of analytical chemistry. This review provides an update of instrumentation developments in the methodology of CE-MS systems. A selection of relevant articles covers the literatures published from Jan. 2013 to Feb. 2017. Special attentions were paid to the sample injection and ionization processes.Applications of these CE-MS systems were also introduced through representative examples. General conclusions and perspectives were given at the last.展开更多
文摘A three-dimensional finite element model for phase change random access memory （PCRAM） is established for comprehensive electrical and thermal analysis during SET operation. The SET behaviours of the heater addition structure （HS） and the ring-type contact in bottom electrode （RIB） structure are compared with each other. There are two ways to reduce the RESET current, applying a high resistivity interracial layer and building a new device structure. The simulation resuIts indicate that the variation of SET current with different power reduction ways is little. This study takes the RESET and SET operation current into consideration, showing that the RIB structure PCRAM cell is suitable for future devices with high heat efficiency and high-density, due to its high heat efficiency in RESET operation.
基金supported by Ministry of Science and Technology(MOST)instrumentation program of China(No.2012YQ04014007)National Natural Science Foundation of China(NSF)(No.21475010)+1 种基金Beijing Natural Science Foundation(BNSF)(No.16L00065)State Key Laboratory Explosion Science and Technology(No.YBKT16-17)
文摘Capillary electrophoresis-mass spectrometry（CE-MS） is a powerful separation and analytical technique in the field of analytical chemistry. This review provides an update of instrumentation developments in the methodology of CE-MS systems. A selection of relevant articles covers the literatures published from Jan. 2013 to Feb. 2017. Special attentions were paid to the sample injection and ionization processes.Applications of these CE-MS systems were also introduced through representative examples. General conclusions and perspectives were given at the last.
