3D Memory Bit-Line Pillars for Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As integrated circuits (ICs) scale down, wire performance and functionality degrade, leading to increased power consumption and limitations in 3D stacked semiconductor devices, where existing techniques struggle to efficiently manage wire lengths and thermal management in 3D memory and logic circuits.
Innovation Solution
The development of 3D Integrated Circuit (IC) devices with vertically oriented bit-line pillars connected to memory transistors, featuring metallic properties, thermal paths, and crystallized polysilicon channels, along with advanced layer transfer technologies for heterogeneous integration, enabling efficient heat removal and improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional 3D stacking techniques are used, then transistor density is improved, but wire performance degrades and power consumption increases
Solution Approach 1:
The patent transitions from conventional planar interconnects to vertically oriented bit-line pillars, moving the interconnect architecture into the third dimension. This dimensional change allows transistors to be stacked vertically while maintaining efficient vertical connections through the pillars, reducing the need for long horizontal wire runs that consume power and limit performance.
2Loss of time
If wire length is reduced through 3D stacking, then wiring delay is reduced, but thermal management becomes more challenging
Solution Approach 1:
The patent introduces thermal pathways as intermediary structures that facilitate heat removal from the densely packed 3D memory architecture. These thermal pathways act as mediators between the heat-generating transistors and the heat dissipation mechanisms, enabling effective thermal management in the compact 3D structure where wiring delay is minimized.
3Length of stationary object
If vertically oriented bit-line pillars are implemented, then wire length is reduced, but device complexity increases
Solution Approach 1:
The vertically oriented bit-line pillars serve multiple functions simultaneously: they act as electrical interconnects for memory access, provide thermal pathways for heat dissipation, and enable the 3D stacking architecture. This multi-functionality reduces the need for separate structures, thereby limiting the increase in device complexity despite the architectural transformation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces wire lengths, enhances memory cell performance, and improves thermal management, leading to increased efficiency and reduced power consumption in 3D memory devices, while allowing for innovative IC devices with reduced development costs and simpler process flows.
Implementation Method 1
thermal paths... enabling efficient heat removal
Implementation Method 2
crystallized polysilicon channels... connected to memory transistors
Data Source
AI summary
A 3D memory device, the device including: a plurality of memory cells, where each memory cell of the plurality of memory cells includes at least one memory transistor, where each of the at least one memory transistor includes a source, a drain, and a channel; and a plurality of bit-line pillars, where each bit-line pillar of the plurality of bit-line pillars is directly connected to a plurality of the source or the drain, where the plurality of bit-line pillars are vertically oriented, where the channel is horizontally oriented, where a plurality of the channels are connected to a body pillar, and where the body pillar is at least temporary connected to a negative bias.