摘要:
PROBLEM TO BE SOLVED: To provide a non-volatile resistance change element with a sufficient data storage characteristic.SOLUTION: The non-volatile resistance change element comprises a lower electrode 11, an upper electrode 12 including any metal element of Ag, Cu, Ni, Co, Al and Ti, a low diffusion layer 13 arranged between the lower electrode 11 and the upper electrode 12, and a high diffusion layer 14 arranged between the lower electrode 11 and the low diffusion layer 13. A diffusion coefficient of the metal element in the high diffusion layer 14 is larger than that in the low diffusion layer 13.
摘要:
PROBLEM TO BE SOLVED: To definitely select one from among a plurality of semiconductor layers on a semiconductor substrate.SOLUTION: A semiconductor device according to an embodiment comprises: first through third semiconductor layers 12-1-12-3; and a layer selection transistor 15 (LST) selecting one from among the first through third semiconductor layers 12-1-12-3. The first semiconductor layer 12-1 includes a normally-on region 17-1 causing channels adjacent to first through third gate electrodes 16-1-16-3 to be normally-on channels. The second semiconductor layer 12-2 includes a normally-on region 17-2 causing channels adjacent to second through fourth gate electrodes 16-2-16-4 to be normally-on channels. The third semiconductor layer 12-3 includes a normally-on region 17-3 causing channels adjacent to third through fifth gate electrodes 16-3-16-5 to be normally-on channels.
摘要:
PROBLEM TO BE SOLVED: To improve characteristics or reliability of memory cells of a three-dimensional nonvolatile semiconductor storage device.SOLUTION: A nonvolatile semiconductor storage device according to an embodiment comprises: a fin structure which extends in a second direction and includes a structure in which a first oxide layer 2, a semiconductor layer 3 and a second oxide layer 4 are stacked in a first direction in this order; and a gate structure which is arranged on a surface positioned in a third direction of the semiconductor layer 3 and in which a gate oxide layer 5, a charge storage layer 6, a block insulation layer 7 and a control gate electrode 8 are stacked in this order. The surface positioned in the third direction of the semiconductor layer 3 includes a concave surface and is arranged on an inner side than a surface positioned in the third direction of the first and second oxide layers 2, 4. A surface of the charge storage layer 6 on the gate oxide layer 5 side includes a convex surface. The concave surface of the semiconductor has curvature smaller than curvature of the convex surface of the charge storage layer 6.
摘要:
PROBLEM TO BE SOLVED: To provide a non-volatile resistance variation element capable of suppressing deterioration and variation in device properties and having a rectification function.SOLUTION: There is provided a non-volatile resistance variation element comprising: an upper electrode 1 containing a metallic element; a lower electrode 2 containing an n-type semiconductor; and a resistance variation layer 3 arranged between the upper electrode 1 and the lower electrode 2 and including a conductor part formed of the metallic element included in the upper electrode 1. The conductor part included in the resistance variation layer 3 is separated from the lower electrode 2.
摘要:
PROBLEM TO BE SOLVED: To provide a high-performance nonvolatile semiconductor memory device.SOLUTION: A nonvolatile semiconductor memory device includes fin-type stacked structures Fin0 to Fin3 having first and second memory cells MC stacked in a first direction and extending in a second direction, and a beam 5 connected to one end in the second direction of the fin-type stacked structures Fin0 to Fin3 and extending in a third direction. The fin-type stacked structures Fin0 to Fin3 and the beam 5 each have first and second semiconductor layers 2a and 2b stacked in the first direction. The beam 5 has a contact portion with respect to the first and second semiconductor layers 2a and 2b at one end in the third direction and has a low-resistance region 8 extending from the connection portion between the beam 5 and the fin-type stacked structures Fin0 to Fin3 to the contact portion.
摘要:
PROBLEM TO BE SOLVED: To suppress deterioration of insulating properties of a resistance variable layer which reversibly varies resistance by letting metal enter and leave an electrode.SOLUTION: A resistance variable layer 2 contains a semiconductor element, and is capable of reversibly varying resistance by letting a metallic element of a second electrode 4 enter and leave. A dielectric layer 3 is inserted between the second electrode 4 and the resistance variable layer 2. A diffusion coefficient of the metallic element of the second electrode 4 is smaller than that of the resistance variable layer 2.
摘要:
PROBLEM TO BE SOLVED: To provide a non-volatile resistance variation element capable of reducing the voltage necessary for varying resistance of a resistance variation layer and a method of manufacturing the same.SOLUTION: A resistance variation layer 2 is stacked on a first electrode 1. A second electrode 4 is stacked on the resistance variation layer 2 via an ionic activation layer 3. The resistance variation layer 2 contains a semiconductor atom. The ionic activation layer 3 contains a semiconductor atom. The percentage of the semiconductor atom of the ionic activation layer 3 being unterminated is high compared to the semiconductor atom of the resistance variation layer 2.
摘要:
PROBLEM TO BE SOLVED: To obtain a highly reliable semiconductor memory device that prevents malfunction of writing to a memory cell unit, even when the semiconductor memory, such as a flash memory is microfabricated. SOLUTION: The semiconductor memory device includes: a semiconductor substrate; a plurality of multilayer structures in which a tunnel insulating film, a charge storage layer, an upper insulating film and a control electrode are sequentially laminated, and arranged at prescribed intervals on the semiconductor substrate; an impurity doping layer formed on both ends of each of the plurality of multilayer structures; and an insulating area, which is formed to face at least one of the plurality of multilayer structures and to contain the area where tunneling between bands is generated. COPYRIGHT: (C)2010,JPO&INPIT