Patent attributes
A Static Random Access Memory (SRAM) cell that may include a first pull-up transistor, a second pull-up transistor, a first pull-down transistor, a second pull-down transistor, a first pass-gate transistor and a second pass-gate transistor provided at two levels on a substrate. The respective transistors may be vertical transistors. The first pull-up transistor and the second pull-up transistor may be provided at a first level, and the first pull-down transistor, the second pull-down transistor, the first pass-gate transistor and the second pass-gate transistor may be provided at a second level different from the first level. A region where the first pull-up transistor and the second pull-up transistor are located and a region where the first pull-down transistor, the second pull-down transistor, the first pass-gate transistor and the second pass-gate transistor are located may at least partially overlap in a vertical direction with respect to an upper surface of the substrate.
