International Business Machines Corporation
Stacked vertical transport field effect transistor electrically erasable programmable read only memory (EEPROM) devices

Abstract:

A vertically stacked set of an n-type vertical transport field effect transistor (n-type VT FET) and a p-type vertical transport field effect transistor (p-type VT FET) is provided. The vertically stacked set of the n-type VT FET and the p-type VT FET includes a first bottom source/drain layer on a substrate, that has a first conductivity type, a lower channel pillar on the first bottom source/drain layer, and a first top source/drain on the lower channel pillar, that has the first conductivity type. The vertically stacked set of the n-type VT FET and the p-type VT FET further includes a second bottom source/drain on the first top source/drain, that has a second conductivity type different from the first conductivity type, an upper channel pillar on the second bottom source/drain, and a second top source/drain on the upper channel pillar, that has the second conductivity type.