3D Semiconductor Memory Device Stacked Passive Devices

The patent transitions from two-dimensional planar semiconductor devices to three-dimensional vertically stacked memory structures. Multiple memory cell layers are stacked in the vertical direction, allowing integration scaling without requiring finer lateral patterning. This dimensional change enables higher integration while avoiding the need for expensive advanced lithography processes.

The patent implements a stacked architecture where multiple memory cell layers are nested vertically. Each layer contains memory cells formed over the substrate, with subsequent layers stacked above previous layers. This nesting approach maximizes the use of vertical space to increase storage capacity without expanding the lateral footprint or requiring proportionally more complex manufacturing.

The patent divides the semiconductor structure into distinct functional regions: active memory cell regions where memory cells are formed, and separate passive device regions where capacitors and other passive components are placed. This segmentation allows passive devices to be positioned in dedicated areas without interfering with the vertical stacking of memory cells, simplifying the overall layout and manufacturing process.

The patent applies different structural configurations to different regions of the semiconductor device. Memory cell regions utilize vertical channel structures and gate electrodes for high-density storage, while passive device regions employ planar capacitor structures with plate electrodes and dielectric layers. This local optimization allows each region to be designed for its specific function without compromising the other.