Abstract:
A magnetic memory cell array device can include a first current source line extending between pluralities of first and second memory cells configured for respective simultaneous programming and configured to conduct adequate programming current for writing one of the pluralities of first and second memory cells, a first current source transistor coupled to the first current source line and to a word line, a programming conductor coupled to the first current source transistor and extending across bit lines coupled to the one of the pluralities of first and second memory cells, configured to conduct the programming current across the bit lines, a second current source transistor coupled to the programming conductor and configured to switch the programming current from the programming conductor to a second current source transistor output, a second current source line extending adjacent the one of the pluralities of first and second memory cells opposite the first current source line, a first bias circuit configured to apply a first bias voltage to the first or second memory cells selected for accessed during a read operation, and a second bias circuit configured to apply a second bias voltage to the first or second memory cells unselected for access during the read operation.
Abstract:
Provided is a method of manufacturing a semiconductor device having a switching device capable of preventing a snake current. First, a transition metal oxide layer and a leakage control layer are alternately stacked on a substrate 1 to 20 times to form a varistor layer. The transition metal oxide layer is formed to contain an excessive transition metal compared to its stable state. The leakage control layer may be formed of one selected from the group consisting of a Mg layer, a Ta layer, an Al layer, a Zr layer, a Hf layer, a polysilicon layer, a conductive carbon group layer, and a Nb layer.
Abstract:
Magnetic Random Access Memory (MRAM) devices include a lower electrode and a magnetic tunnel junction on the lower electrode. The magnetic tunnel junction includes a seed layer and a tunneling barrier that is oriented in a same direction as the most closely packed plane direction of the seed layer. An oxide layer may be provided between the lower electrode and the magnetic tunnel junction. The lower electrode may be a titanium-rich TiN layer having more than 50 atomic percent titanium content. Analogous fabrication methods are also described.
Abstract:
Methods of programming a RRAM device are provided. An increasing set current is applied to a data storing layer pattern of the RRAM device while measuring a resistance of the data storing layer pattern until the resistance indicates a set state in the data storing layer pattern. An increasing reset voltage is applied to the data storing layer pattern of the RRAM device while measuring the resistance of the data storing layer pattern until the resistance indicates a reset state in the data storing layer pattern.
Abstract:
A method of programming a non-volatile memory device including a transition metal oxide layer includes applying a first electric pulse to the transition metal oxide layer for a first period to reduce a resistance of the transition metal oxide layer and applying a second electric pulse to the transition metal oxide layer for a second period, longer than the first period, to increase the resistance of the transition metal oxide layer. Related devices are also disclosed.
Abstract:
A method of accessing a resistive memory device can include applying a predetermined voltage level to a first word line coupled to a first resistive memory cell block during a read operation of a second resistive memory cell block coupled to a second word line, A programming current can be conducted via a pair of opposing current source transistors located on first and second opposing sides of the first block to provide the programming current from the first end to the second end across bit lines coupled to resistive memory cells in the first block and to provide the programming current parallel to the second block.
Abstract:
Non-volatile memory cells employing a transition metal oxide layer as a data storage material layer are provided. The non-volatile memory cells include a lower and upper electrodes overlapped with each other. A transition metal oxide layer pattern is provided between the lower and upper electrodes. The transition metal oxide layer pattern is represented by a chemical formula MxOy. In the chemical formula, the characters “M”, “O”, “x” and “y” indicate transition metal, oxygen, a transitional metal composition and an oxygen composition, respectively. The transition metal oxide layer pattern has excessive transition metal content in comparison to a stabilized transition metal oxide layer pattern. Methods of fabricating the non-volatile memory cells are also provided.
Abstract translation:提供了使用过渡金属氧化物层作为数据存储材料层的非易失性存储单元。 非易失性存储单元包括彼此重叠的下电极和上电极。 在下电极和上电极之间设置过渡金属氧化物层图案。 过渡金属氧化物层图案由化学式M X x O Y y表示。 在化学式中,字母“M”,“O”,“x”和“y”分别表示过渡金属,氧,过渡金属组成和氧组成。 与稳定的过渡金属氧化物层图案相比,过渡金属氧化物层图案具有过量的过渡金属含量。 还提供了制造非易失性存储单元的方法。
Abstract:
A magnetic tunnel junction device includes a magnetically programmable free magnetic layer. The free magnetic layer includes a lamination of at least two ferromagnetic layers and at least one intermediate layer interposed between the at least two ferromagnetic layers.
Abstract:
A semiconductor device includes a first horizontal molding pattern, a horizontal electrode pattern disposed on the first horizontal molding pattern, and a second horizontal molding pattern disposed on the horizontal electrode pattern. A vertical structure extends through the horizontal patterns. The vertical structure includes a vertical electrode pattern, a data storage pattern interposed between the vertical electrode pattern and the horizontal patterns, a first buffer pattern interposed between the data storage pattern and the first molding pattern, and a second buffer pattern interposed between the data storage pattern and the second molding pattern and spaced apart from the first buffer pattern.
Abstract:
Semiconductor memory devices include a first storage layer and a second storage layer, each of which includes at least one array, and a control layer for controlling access to the first storage layer and the second storage layer so as to write data to or read data from the array included in the first storage layer or the second storage layer in correspondence to a control signal. A memory capacity of the array included in the first storage layer is different from a memory capacity of the array included in the second storage layer.