摘要:
A nonvolatile memory element of the present invention comprises a first electrode (103), a second electrode (108); a resistance variable layer (107) which is interposed between the first electrode (103) and the second electrode (107) and is configured to switch a resistance value reversibly in response to an electric signal applied between the electrodes (103) and (108), and the resistance variable layer (107) has at least a multi-layer structure in which a first hafnium-containing layer having a composition expressed as HfOx (0.9≦x≦1.6), and a second hafnium-containing layer having a composition expressed as HfOy (1.8
摘要:
A nonvolatile memory element comprises a first electrode layer (103), a second electrode (107), and a resistance variable layer (106) which is disposed between the first electrode layer (103) and the second electrode layer (107), a resistance value of the resistance variable layer varying reversibly according to electric signals having different polarities which are applied between the electrodes (103), (107), wherein the resistance variable layer (106) has a first region comprising a first oxygen-deficient tantalum oxide having a composition represented by TaOx (0
摘要:
A nonvolatile memory element of the present invention comprises a first electrode (103); a second electrode (109); and a resistance variable layer (106) disposed between the first electrode and the second electrode, resistance values of the resistance variable layer reversibly changing in response to electric signals applied between the first electrode and the second electrode; at least one of the first electrode and the second electrode including a platinum-containing layer (107) comprising platinum; the resistance variable layer including at least a first oxygen-deficient transition metal oxide layer (104) which is not physically in contact with the platinum-containing layer and a second oxygen-deficient transition metal oxide layer (105) which is disposed between the first oxygen-deficient transition metal oxide layer and the platinum-containing layer and is physically in contact with the platinum-containing layer; x
摘要:
A nonvolatile semiconductor apparatus of the present invention comprises (103), a second electrode (105), and a resistance variable layer (104) disposed between the first electrode (103) and the second electrode (105), a resistance value of the resistance variable layer being switchable reversibly in response to an electric signal applied between the electrodes (103), (105), wherein the resistance variable layer (104) comprises an oxide containing tantalum and nitrogen.
摘要:
Provided is a method for reading data from a variable resistance nonvolatile storage element, where the operation for reading data is less susceptible to a fluctuation phenomenon of resistance values in reading the data. The method includes: detecting a current value Iread that flows through the nonvolatile storage element that can be in a low resistance state RL and a high resistance state RH, with application of a fixed voltage; and determining that (i) the nonvolatile storage element is in a high resistance state when the current value Iread detected in the detecting is smaller than a current reference level Iref, and (ii) the nonvolatile storage element is in a low resistance state when the current value Iread detected in the detecting is larger than the reference level Iref, the current reference level Iref being defined by (IRL+IRH)/2
摘要:
Provided is a method for reading data from a variable resistance nonvolatile storage element, where the operation for reading data is less susceptible to a fluctuation phenomenon of resistance values in reading the data. The method includes: detecting a current value Iread that flows through the nonvolatile storage element that can be in a low resistance state RL and a high resistance state RH, with application of a fixed voltage; and determining that (i) the nonvolatile storage element is in a high resistance state when the current value Iread detected in the detecting is smaller than a current reference level Iref, and (ii) the nonvolatile storage element is in a low resistance state when the current value Iread detected in the detecting is larger than the reference level Iref, the current reference level Iref being defined by (IRL+IRH)/2
摘要:
A variable resistance nonvolatile storage device which includes (i) a semiconductor substrate (301), (ii) a variable resistance element (309) having: lower and upper electrodes (309a, 309c); and a variable resistance layer (309b) whose resistance value reversibly varies based on voltage signals each of which has a different polarity and is applied between the electrodes (309a, 309c), and (iii) a MOS transistor (317) formed on the substrate (301), wherein the variable resistance layer (309b) includes: oxygen-deficient transition metal oxide layers (309b-1, 309b-2) having compositions MOX and MOy (where x
摘要:
A nonvolatile memory element includes first and second electrodes, and a resistance variable layer disposed therebetween. At least one of the first and second electrodes includes a platinum-containing layer. The resistance variable layer includes a first oxygen-deficient transition metal oxide layer which is not physically in contact with the platinum-containing layer and a second oxygen-deficient transition metal oxide layer which is disposed between the first oxygen-deficient transition metal oxide layer and the platinum-containing layer and is physically in contact with the platinum-containing layer. When oxygen-deficient transition metal oxides included in the first and second oxygen-deficient transition metal oxide layers are expressed as MOx, and MOy, respectively, x
摘要:
A nonvolatile memory element of the present invention comprises a first electrode (503); a second electrode (505); and a resistance variable layer (504) which is disposed between the first electrode (503) and the second electrode (505), a resistance value of the resistance variable layer being changeable in response to electric signals which are applied between the first electrode (503) and the second electrode (505), wherein the first electrode and the second electrode comprise materials which are made of different elements.
摘要:
Each of memory cells (MC) includes one transistor and one resistance variable element. The transistor includes a first main terminal, a second main terminal and a control terminal. The resistance variable element includes a first electrode, a second electrode and a resistance variable layer provided between the first electrode and the second electrode. A first main terminal of one of two adjacent memory cells is connected to a second main terminal of the other memory cell, to form a series path (SP) sequentially connecting main terminals of the plurality of memory cells in series. Each of the memory cells is configured such that the control terminal is a part of a first wire (WL) associated with the memory cell or is connected to the first wire associated with the memory cell, the second electrode is a part of a second wire (SL) associated with the memory cell or is connected to the second wire associated with the memory cell; and the first electrode is a part of a series path (SP) associated with the memory cell or is connected to the series path associated with the memory cell.