US Patent 7985961 Resistive random access memory device

Example embodiments may provide resistive random access memory devices and/or methods of manufacturing resistive random access memory devices. Example embodiment resistive random access memory devices may include a switching device and/or a storage node connected to the switching device. The storage node may include a stack structure including a plurality of resistance change layers separated from one another and first and second electrodes each on a side wall of the stack structure. The resistance change layers may be connected to the first and the second electrodes in parallel and/or may have different switching voltages from each other.