3D Memory Devices With Thermal Isolation Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As integrated circuits (ICs) scale down, wire performance and density degrade, leading to increased power consumption and reduced functionality, despite advancements in transistor performance. 3D stacking of semiconductor devices is explored to mitigate these issues, but existing methods face challenges in efficient layer transfer and thermal isolation.
Innovation Solution
The method involves a 3D IC system construction using layer transfer techniques, including oxide-to-oxide and conductor-to-conductor bonding, with thermal isolation layers to manage temperature differences between memory and logic strata, enabling efficient integration of memory and logic circuits while maintaining performance and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If conventional 3D stacking technologies are used to reduce wire lengths, then wire length is reduced, but thermal management deteriorates due to increased power consumption and heat generation
Solution Approach 1:
The patent divides the 3D IC structure into multiple stacked layers with thermal isolation layers positioned between them. This segmentation creates discrete thermal zones that can be managed independently, allowing heat from high-power logic circuits in upper layers to be isolated from sensitive memory circuits in lower layers, thus resolving the thermal management issue while maintaining short wire lengths within each layer
Solution Approach 2:
The patent introduces thermal isolation layers as intermediary structures between different functional layers. These layers act as thermal barriers that prevent heat transfer between adjacent layers, enabling the system to achieve both short wire lengths for performance and effective thermal isolation for temperature control
2Adaptability or versatility
If heterogeneous integration of memory and logic circuits is implemented, then functionality is improved, but device complexity increases due to multiple bonding interfaces
Solution Approach 1:
The patent employs universal bonding interfaces that can accommodate both oxide-to-oxide bonding and conductor-to-conductor bonding. This multi-functional bonding approach allows the same interface structure to handle different bonding types, simplifying the overall device complexity while enabling heterogeneous integration of memory and logic circuits with different material requirements
3Manufacturing precision
If oxide-to-oxide and conductor-to-conductor bonding are used for layer transfer, then integration precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes controlled parameter changes during the bonding process, including temperature, pressure, and oxide layer thickness, to achieve precise alignment and bonding. By optimizing these parameters, the system achieves high integration precision while managing manufacturing complexity through process control
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 enhances the performance and functionality of ICs by reducing wire lengths, improving thermal management, and allowing for heterogeneous integration of memory and logic circuits, thereby addressing the limitations of scaled-down ICs.
Implementation Method 1
the bonding includes oxide to oxide and conductor to conductor bonding
Implementation Method 2
the bonding includes oxide to oxide and conductor to conductor bonding
Data Source
AI summary
A semiconductor device, the device including: a first level including control circuits, where the control circuits include a plurality of first transistors and a plurality of metal layers; and a memory level disposed on top of the first level, where the memory level includes an array of memory cells, where each of the memory cells includes at least one second transistor, where the control circuits control access to the array of memory cells, where the first level is bonded to the memory level, where the bonded includes oxide to oxide bonding regions and a plurality of metal to metal bonding regions, and where at least a portion of the array of memory cells is disposed directly above at least one of the plurality of metal to metal bonding regions.