3D Semiconductor Memory Vertical Stacking Integration Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Two-dimensional semiconductor devices face limitations in integration density due to the high cost and inefficiency of forming fine patterns, necessitating the development of three-dimensional semiconductor memory devices with enhanced packing density.
Innovation Solution
The proposed 3D semiconductor memory device architecture includes vertically stacked insulating and conductive layers, through-interconnections, and a peripheral logic structure with a cell array region, dummy stack structures, and capacitors to increase integration density and improve electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If two-dimensional semiconductor devices use fine pattern formation techniques to increase integration density, then integration density is improved, but manufacturing cost increases significantly due to extremely high-priced apparatuses
Solution Approach 1:
The patent transitions from two-dimensional planar semiconductor devices to three-dimensional vertically stacked memory structures. Multiple memory cell layers are stacked vertically with alternating conductive and insulating layers, enabling higher integration density without requiring finer lateral patterning. This vertical stacking approach achieves increased capacity while avoiding the need for extremely high-priced fine pattern formation apparatuses.
2Quantity of substance
If three-dimensional semiconductor memory devices are developed to overcome 2D limitations, then integration density is improved, but device complexity increases due to vertically stacked insulating and conductive layers
Solution Approach 1:
The three-dimensional memory structure is divided into multiple discrete layers including first insulating layers, second insulating layers, conductive layers, and through-interconnections. Each layer serves a specific function and can be manufactured using standardized processes. The segmented modular architecture manages complexity by organizing the vertical stack into repeatable units that can be systematically fabricated.
Solution Approach 2:
The vertically stacked structure incorporates multiple functional elements within a unified architecture. The alternating conductive and insulating layers serve both as memory cell components and as interconnection structures. Through-interconnections penetrate multiple layers to provide electrical access, combining storage and connectivity functions in a single integrated structure rather than requiring separate components.
Data Source
AI summary
A three-dimensional semiconductor memory device includes a plurality of first insulating layers vertically stacked on a peripheral logic structure, second insulating layers stacked alternately with the first insulating layers, conductive layers stacked alternately with the first insulating layers and disposed on sidewalls of the second insulating layers, through-interconnections penetrating the first insulating layers and the second insulating layers so as to be connected to the peripheral logic structure, and a first conductive line electrically connected to a plurality of first conductive layers of the conductive layers.