HBM Interface Die Layout for Heat-Mitigation in SiP Packages
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Solution Overview
Problem
High-bandwidth memory devices in system-in-package configurations face challenges with increasing power density due to shrinking size and increasing functionality, leading to heat-related issues that degrade communication channels and increase memory loss.
Innovation Solution
The solution involves positioning heat-generating components, such as IO circuits, closer to thermal interface materials by rearranging the layout of the SiP device, using a communication substrate above the host and HBM devices to reduce communication channel length and eliminate the need for certain TSVs, thereby reducing heat production and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device footprint is reduced to meet market demands, then the device size decreases, but heat dissipation becomes more difficult and power density increases
Solution Approach 1:
The patent transitions from planar heat dissipation to three-dimensional heat management by stacking memory dies vertically and positioning heat-generating IO circuits adjacent to thermal interface materials in the Z-dimension, enabling effective heat dissipation despite reduced footprint
Solution Approach 2:
The patent applies different thermal management strategies to different regions: heat-generating IO circuits are positioned adjacent to thermal interface materials while memory dies are positioned on the opposite side, creating localized heat dissipation paths optimized for each component's thermal characteristics
2Productivity
If circuit density and functionality are increased, then device performance improves, but power consumption and heat generation increase
Solution Approach 1:
The patent achieves high performance by stacking multiple memory dies vertically to increase capacity and bandwidth while positioning IO circuits in adjacent tiers to minimize communication distances, reducing power consumption despite increased functionality
Solution Approach 2:
The patent introduces substrate-backed IO circuits as intermediary components between memory dies and external interfaces, enabling efficient data transfer and reducing the energy required for communication across the package
3Speed
If communication channel length is reduced, then data transfer speed improves, but device layout complexity increases
Solution Approach 1:
The patent achieves short communication channels by positioning IO circuits in tiers adjacent to memory dies and utilizing through-substrate vias for vertical interconnections, enabling high-speed data transfer while maintaining a systematic stacked layout rather than increasing planar 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 effectively dissipates heat from the IO circuits, reducing operational temperatures, improving data retention, and extending the lifetime of the SiP device while minimizing manufacturing costs and increasing available space for other circuits.
Implementation Method 1
positioning heat-generating components, such as IO circuits, closer to thermal interface materials
Data Source
AI summary
System-in-package (SiP) devices, and associated systems and methods are disclosed herein. In some embodiments, a SiP device can include a base substrate, as well as a host device and a heat-mitigating high-bandwidth memory (HBM) device each integrated with the base substrate. The heat-mitigating HBM device can include a stack of one or more memory dies and an interface die carried by the stack of one or more memory dies. The interface die includes an input/output (IO) circuit that is accessible through an upper surface of the interface die. The SiP device can also include a communication substrate carried by the host device and the heat-mitigating HBM device, as well as a thermal interface material carried by the communication substrate. The communication substrate can include one or more communication channels communicably coupling the IO circuit of the interface die to the host device.