PoP Semiconductor Package Heat Spreader for Dense Package Cooling
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Solution Overview
Problem
The semiconductor industry faces challenges in achieving effective heat dissipation in densely packed semiconductor packages, which limits the performance and reliability of integrated circuit devices due to inadequate thermal management in Package-on-Package (PoP) technology.
Innovation Solution
Incorporating a heat spreader with high thermal conductivity between the memory package component and the IC package component, or directly attaching the IC die to the memory package, to facilitate heat dissipation from the IC die to the heat sink, thereby improving thermal management and reducing operating temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Package-on-Package (PoP) technology is used to increase integration density, then component density and functionality are improved, but heat dissipation capability deteriorates due to densely packed semiconductor packages
Solution Approach 1:
The patent transitions from planar packaging to three-dimensional stacked PoP architecture, enabling higher component density by utilizing vertical space. Multiple semiconductor packages are stacked in layers with interconnect structures facilitating electrical connections between dies in different packages, thereby achieving enhanced integration while managing thermal challenges through the vertical configuration.
Solution Approach 2:
The patent introduces intermediate structures including heat spreaders, thermal interface materials, and encapsulants between the semiconductor dies and external environment. These intermediary elements facilitate heat transfer from high-density packed dies to heat sinks, addressing the thermal management challenge created by increased component density.
2Quantity of substance
If minimum feature size is reduced to improve integration density, then more components can be integrated into a given area, but thermal management becomes more difficult due to smaller heat dissipation pathways
Solution Approach 1:
The patent divides the semiconductor device into multiple discrete packages stacked in a PoP configuration. Each package contains one or more dies with interconnect structures that provide both electrical connectivity and thermal pathways. This segmentation allows independent thermal management of each package layer, simplifying the overall thermal management challenge despite high integration density.
Solution Approach 2:
The patent employs composite material structures including multi-layer encapsulants, hybrid interconnect materials, and composite heat spreaders that combine different materials with complementary thermal and electrical properties. These composite structures provide optimized thermal conduction pathways while maintaining electrical functionality in the densely integrated PoP device.
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 heat dissipation by up to 22% and improves device performance by effectively transferring heat from the IC die to the memory package, addressing the thermal limitations in existing PoP technologies.
Implementation Method 1
Incorporating a heat spreader with high thermal conductivity between the memory package component and the IC package component, or directly attaching the IC die to the memory package, to facilitate heat dissipation from the IC die to the heat sink
Data Source
AI summary
A semiconductor package includes a first package component comprising: a first semiconductor die; a first encapsulant around the first semiconductor die; and a first redistribution structure electrically connected to the semiconductor die. The semiconductor package further includes a second package component bonded to the first package component, wherein the second package component comprises a second semiconductor die; a heat spreader between the first semiconductor die and the second package component; and a second encapsulant between the first package component and the second package component, wherein the second encapsulant has a lower thermal conductivity than the heat spreader.