One Selector One Resistor (1S1R) is a random access memory device in which the selector isolates the electrical current to cells that are selected from those that are not, and the resistor stores the information. Compared to a traditional One Transistor One Resistor (1T1R) device which needs 3 terminals (Source line, Bitline and Wordline), 1S1R is a 2-terminal device which can be used in crossbar architecture that has only a Bitline and Wordline) and can therefore enable higher density as well as 3D integration.
