Bypass Interconnect Layout for Stacked Memory Heat Rejection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Placing a high-power logic component at the bottom of a heterogeneous stack of semiconductor dies results in heat rejection challenges due to thermal impedance trapping heat within the integrated package, leading to increased temperature gradients and physical and electrical interference.
Innovation Solution
Implementing bypass interconnections through silicon vias or separate bypass components in the memory stack to route high-speed signals and direct heat transfer to a closer heat sink, while avoiding interference and allocating reserved spaces for these interconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high-power logic component is placed at the bottom of a heterogeneous stack of semiconductor dies, then power density and processing speed are improved, but heat rejection deteriorates due to thermal impedance trapping heat within the integrated package
Solution Approach 1:
The patent introduces bypass interconnections that extend the interface laterally beyond the active area of the memory stack, creating a third-dimensional heat dissipation pathway. This allows heat to escape from the side of the stack rather than being trapped vertically, effectively adding a lateral dimension to thermal management and reducing temperature gradients in the high-power logic component.
Solution Approach 2:
The patent extracts the heat dissipation function from the traditional vertical thermal path through the memory stack and creates a separate bypass pathway. By routing heat away from the constrained vertical path through lateral bypass interconnections, the system separates the computational function (stack) from the thermal management function (bypass path), allowing independent optimization of both.
2Speed
If a high-power logic component is placed at the bottom of a heterogeneous stack, then processing speed is improved, but electrical interference worsens due to thermal impedance and physical interference
Solution Approach 1:
The patent extracts signal routing from the congested vertical interconnect path through the memory stack and creates separate bypass pathways for high-speed signals. By separating signal routing from the thermal management path and using dedicated bypass interconnections, the system eliminates electrical interference while maintaining processing speed improvements from the high-power logic component placement.
3Temperature
If bypass interconnections are implemented through silicon vias or separate bypass components, then heat rejection is improved, but device complexity increases due to additional interconnection structures
Solution Approach 1:
The bypass interconnections are designed to serve multiple functions simultaneously: they provide lateral heat dissipation pathways, route high-speed signals away from interference zones, and extend the interface beyond the active memory area. This multi-functionality reduces the need for separate dedicated structures for each function, thereby limiting the increase in device complexity while achieving multiple thermal and electrical performance improvements.
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 improves heat rejection, reduces temperature gradients, and enhances performance by increasing power density, processing speed, and user experience in electronic devices.
Implementation Method 1
direct heat transfer to a closer heat sink
Data Source
AI summary
Methods, systems, and devices for bypass interconnections for stacked semiconductor systems are described. An interface between a logic component and a system substrate of a semiconductor system may extend beyond an active area of a memory stack and couple between the logic component and the system substrate via one or more bypass regions. In some examples, through-silicon vias may be formed through portions of a memory stack, such as a semiconductor extension at edges of each memory die, which may be used for transfer of high-speed or high-energy signals. Additionally, or alternatively, a logic component may be placed on top of a stack of memory dies with separate bypass components along one or more sides adjacent to a memory stack, through which bypass interconnects may be formed, allowing for different configurations and avoiding the use of memory component silicon being allocated for such interconnections.