3d semiconductor devices and structures with slits

Abstract

A semiconductor device including: a first level including memory control circuits (include a plurality of refresh circuits for the memory units) which include first transistors; a second level including a first array of memory cells including second transistors self-aligned to at least one of the third transistors; a third level disposed on top of the second level disposed on top of first level, the third level including a second array of memory cells including third transistors; a fourth level disposed on top of the third level, the fourth level including a third array of memory cells including fourth transistors, second level is bonded to the first level, a plurality of slits disposed through the second level, the third level, and the fourth level, the slits enable gate replacement of a plurality of the third transistors, where the second array of memory cells include a plurality of independently controlled memory units.