6T SRAM architecture for gate-all-around nanowire devices
Abstract:
A memory device includes a first plurality of semiconductor nanowires tethered between landing pads and suspended over a substrate. A first gate electrode surrounds each of the first plurality of semiconductor nanowires, making them gate-all-around (GAA) semiconductor nanowires. First, second, and third field effect transistors (FETs) are formed by the first plurality of semiconductor nanowires. The memory device also includes a second plurality of semiconductor nanowires tethered between landing pads and suspended over the substrate. A second gate electrode surrounds each of the second plurality of semiconductor nanowires, making them GAA semiconductor nanowires. Fourth, fifth, and sixth FETs are formed by the second plurality of semiconductor nanowires. The first gate electrode is aligned with and cross-coupled to a landing pad of the second plurality of semiconductor nanowires, and the second gate electrode is aligned with and cross-coupled to a landing pad of the first plurality of semiconductor nanowires.
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