3D IC Power and Thermal Management via Peripheral TSVs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
3D integrated circuit (IC) structures face challenges in power and thermal management due to increased resistance and heat trapping when multiple dies are stacked, leading to performance degradation and the need for expensive cooling systems.
Innovation Solution
Implementing a plurality of peripheral through silicon via (TSV) structures that decouple die and inter-die signal and power connections, allowing direct power and signal supply to individual dies and establishing a thermal path for improved heat dissipation, thereby minimizing active die area and reducing power densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If multiple dies are stacked together to improve interconnect performance, then inter-core communication speed is improved, but IR drop increases due to series resistance
Solution Approach 1:
The patent segments the power distribution network by introducing intermediate power supply dies between stacked functional dies. This divides the long series power path into shorter segments, reducing the cumulative resistance and IR drop while maintaining the vertical stacking architecture for fast inter-core communication.
Solution Approach 2:
The intermediate power supply dies act as intermediary elements that provide localized power supply to the stacked functional dies. These intermediary structures reduce the power path resistance by providing power closer to the load, thereby reducing IR drop without compromising the speed benefits of 3D stacking.
2Speed
If multiple dies are stacked together to improve performance, then inter-core communication is faster, but die area increases due to routing congestion
Solution Approach 1:
The patent transitions from traditional 2D planar power distribution to 3D vertical power distribution through TSV-based intermediate power supply structures. This dimensional change allows power routing in the vertical direction, reducing horizontal routing congestion and minimizing the active die area required for power distribution.
3Use of energy by moving object
If multiple dies are stacked together to improve performance, then power efficiency is improved, but heat dissipation becomes difficult
Solution Approach 1:
The intermediate TSV structures serve multiple functions simultaneously: they provide electrical power distribution to stacked dies and acts as thermal conduction paths for heat dissipation. This multi-functionality allows the same vertical interconnect structures to address both power delivery and thermal management, maintaining power efficiency while improving heat dissipation.
Solution Approach 2:
The intermediate power supply dies and TSV structures act as thermal intermediaries that conduct heat away from the stacked functional dies. These intermediary elements provide thermal pathways through the die stack, facilitating heat dissipation while the system maintains its power-efficient 3D architecture.
4Temperature
If expensive cooling systems are added to improve heat dissipation, then temperature control is improved, but device complexity and cost increase
Solution Approach 1:
The patent enables the 3D IC structure to self-manage thermal dissipation through inherently conductive TSV and intermediate die structures that naturally conduct heat away from hot spots. This self-service thermal management eliminates the need for external active cooling systems, reducing device complexity and cost while maintaining effective temperature control.
Solution Approach 2:
The patent converts the potentially harmful heat generation from high-density 3D stacking into a manageable thermal flow by utilizing the same TSV and die structures that provide electrical functionality also serve as thermal conduction paths. This transforms the heat problem into an opportunity to use existing structural elements for thermal management, avoiding additional cooling complexity.
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 IR drop, minimizes active die area for cost reduction, enhances heat dissipation, and eliminates the need for expensive cooling systems, resulting in improved performance and reliability of 3D ICs.
Implementation Method 1
establishing a thermal path for improved heat dissipation
Implementation Method 2
reduces IR drop
Data Source
AI summary
A three dimensional (3D) integrated circuit (IC) structure having improved power and thermal management is described. The 3D IC structure includes at least first and second dies. Each of the first and second dies has at least one power through silicon via (TSV) and one signal TSV. The at least one power and signal TSVs of the first die are connected to the at least one power and signal TSVs of the second die, respectively. The 3D IC structure also includes one or more peripheral TSV structures disposed adjacent to one or more sides of the first and/or the second die. The peripheral TSV structures supply at least power and/or signals.