3D Bit Line Layout for Dense Memory Channel Integration
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Solution Overview
Problem
As semiconductor devices become increasingly integrated, their electrical characteristics and production yields deteriorate, necessitating improvements in both areas to meet demands for high-speed and low-power performance.
Innovation Solution
A semiconductor device design featuring a gate stack structure with alternating insulating and conductive patterns, including first and second separation structures, and bit lines that overlap and electrically connect with memory channel structures, along with a bypass structure to enhance electrical connectivity and integration density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If integration density is increased, then device functionality and capacity are improved, but electrical characteristics and production yields deteriorate
Solution Approach 1:
The patent implements three-dimensionally overlapping bit lines (first bit line and second bit line) that extend in different spatial dimensions, allowing memory channel structures to be disposed between them in the vertical direction. This dimensional arrangement increases integration density while maintaining electrical characteristics by reducing interference compared to planar configurations.
Solution Approach 2:
The bit lines are divided into multiple segmented structures (first bit line and second bit line) that are spatially separated and independently controlled. This segmentation reduces electrical interference between adjacent bit lines, allowing higher integration density without deteriorating electrical characteristics.
2Quantity of substance
If integration density is increased, then device functionality is improved, but production yields are reduced
Solution Approach 1:
By arranging bit lines and memory channel structures in three-dimensional space with vertical overlap, the patent achieves higher integration density within the same footprint without increasing manufacturing complexity. The overlapping configuration uses standard semiconductor fabrication processes, maintaining production yields.
3Quantity of substance
If bit lines are arranged to overlap in vertical direction, then integration density is improved, but electrical interference may increase
Solution Approach 1:
Memory channel structures are positioned as intermediary elements between the first and second overlapping bit lines. This spatial arrangement with the memory channel structure in between acts as an electrical isolation mechanism, reducing direct interference between bit lines while maintaining high integration density through vertical overlap.
Solution Approach 2:
The bit lines are separated in the vertical dimension with memory channel structures disposed between them, transforming a two-dimensional planar interference problem into a three-dimensional spatial arrangement. This dimensional separation reduces electrical interference while achieving higher integration density.
Data Source
AI summary
A semiconductor device includes a gate stack structure including insulating patterns and conductive patterns which are alternately stacked, a first separation structure penetrating the gate stack structure, a second separation structure penetrating the gate stack structure and being adjacent to the first separation structure, first and second memory channel structures penetrating the gate stack structure and disposed between the first separation structure and the second separation structure, a first bit line overlapping with the first and second memory channel structures and electrically connected to the first memory channel structure, and a second bit line overlapping with the first and second memory channel structures and the first bit line and electrically connected to the second memory channel structure.