Hybrid Memory Cells Combining Horizontal and Vertical Stacking
Solution Overview
Problem
Existing memory devices can only be either horizontally oriented or vertically stacked, leading to large size and low density, as they cannot combine both configurations effectively.
Innovation Solution
The formation of memory devices with both horizontally oriented and vertically stacked memory cells, achieved by creating a vertical stack with alternating insulator and memory cell materials and forming electrodes on both sides of the cells, allowing for efficient use of space and increased density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If memory devices use only horizontally oriented cells or only vertically stacked cells, then the device structure is simpler, but the device size is large and density is low
Solution Approach 1:
The patent merges horizontally oriented memory cells with vertically stacked configurations into a hybrid structure. The memory device includes memory cells arranged in both horizontal rows and vertical stacks, combining the advantages of both orientations to achieve higher density while maintaining manageable structural complexity through systematic integration.
Solution Approach 2:
The patent transitions from two-dimensional horizontal arrays to three-dimensional vertically stacked structures. By adding the vertical dimension with multiple stacked memory cell layers, the device achieves increased storage density without proportionally increasing the horizontal footprint, effectively utilizing spatial dimensions to resolve the density-complexity contradiction.
2Quantity of substance
If memory devices combine horizontally oriented and vertically stacked cells, then memory density increases and size decreases, but device structure becomes more complex
Solution Approach 1:
The patent segments the memory device into distinct functional regions: horizontally oriented memory cell regions and vertically stacked memory cell regions. This segmentation allows each region to be optimized independently for its specific orientation while maintaining overall device integration, managing structural complexity through modular regional design.
Solution Approach 2:
The patent creates a universal memory device structure that can accommodate both horizontal and vertical memory cell configurations within the same device. The hybrid architecture serves multiple functions: horizontal cells provide one access pattern while vertical stacks provide another, making the device adaptable to different access requirements and increasing overall efficiency.
3Quantity of substance
If vertically stacked memory cells are formed with alternating insulator and memory cell materials, then space utilization improves and density increases, but manufacturing process becomes more complex
Solution Approach 1:
The patent employs preliminary patterning and material deposition steps to prepare the substrate before forming the vertically stacked structure. By pre-defining the locations and patterns of insulator and memory cell materials through sequential deposition and etching, the complex multi-layer vertical structure is built systematically, reducing manufacturing complexity compared to forming all layers simultaneously.
Solution Approach 2:
The patent utilizes parameter changes in material properties during manufacturing, such as alternating between insulator materials and memory cell materials with different deposition requirements. By controlling deposition parameters, etching selectivity, and material phase transitions during the formation process, the complex alternating structure is manufactured through manageable parameter adjustments rather than complex mechanical operations.
Data Source
AI summary
Horizontally oriented and vertically stacked memory cells are described herein. One or more method embodiments include forming a vertical stack having a first insulator material, a first memory cell material on the first insulator material, a second insulator material on the first memory cell material, a second memory cell material on the second insulator material, and a third insulator material on the second memory cell material, forming an electrode adjacent a first side of the first memory cell material and a first side of the second memory cell material, and forming an electrode adjacent a second side of the first memory cell material and a second side of the second memory cell material.