Heterogeneous IC Bonding Layers for Heat and Interface Reliability
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Solution Overview
Problem
The semiconductor industry faces challenges in effectively dissipating heat generated by integrated circuit dies and ensuring reliable bonding interfaces as devices shrink in size, which affects performance and reliability.
Innovation Solution
The integration of heterogeneous bonding layers with alternating patterns of different materials on both upper and lower integrated circuit dies, facilitating improved bonding interfaces and enhanced heat dissipation through direct dielectric-to-dielectric and metal-to-metal bonding configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If integrated circuit dies are shrunk to reduce device size, then device miniaturization is achieved, but heat dissipation becomes less effective
Solution Approach 1:
The bonding layer is segmented into multiple heterogeneous regions with different materials (e.g., first bonding layer material and second bonding layer material) arranged in specific patterns. This segmentation creates multiple thermal pathways with different thermal conductivities, enabling more effective heat dissipation from the integrated circuit die while maintaining the miniaturized device form factor.
Solution Approach 2:
Different regions of the bonding layer are assigned different material properties tailored to local requirements. High thermal conductivity materials are positioned in regions requiring efficient heat transfer, while other materials are placed where electrical isolation or mechanical properties are prioritized. This local optimization of material properties enhances overall heat dissipation performance in the compact device.
2Volume of moving object
If integrated circuit dies are shrunk to reduce device size, then device miniaturization is achieved, but bonding interface reliability deteriorates
Solution Approach 1:
The bonding interface is divided into multiple heterogeneous regions with different materials configured in specific patterns. This segmentation allows different bonding mechanisms to operate simultaneously at the same interface, distributing mechanical and thermal stresses across multiple material systems, thereby enhancing bonding reliability in miniaturized devices where stress concentration is more critical.
Solution Approach 2:
The bonding layer employs composite material structures combining multiple materials with complementary properties. This composite approach creates a bonding interface that simultaneously provides mechanical strength, thermal management, and electrical isolation, maintaining high reliability despite the reduced device size and associated manufacturing tolerances.
3Temperature
If heterogeneous bonding layers with alternating material patterns are implemented, then heat dissipation is improved, but manufacturing complexity increases
Solution Approach 1:
The bonding layer is segmented into discrete heterogeneous regions that can be formed using standard semiconductor fabrication techniques such as selective deposition and patterning. This segmentation approach allows complex thermal management structures to be built using conventional process steps, reducing the manufacturing complexity increase associated with implementing heat dissipation enhancements.
4Reliability
If heterogeneous bonding layers with alternating material patterns are implemented, then bonding interface reliability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The bonding interface is segmented into multiple heterogeneous regions that can be formed using modular fabrication processes. This segmentation allows each region to be optimized and controlled independently, distributing the precision requirements across multiple process steps rather than requiring ultra-high precision in a single monolithic bonding operation, thereby achieving high reliability with manageable manufacturing precision requirements.
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 leads to more effective heat dissipation and improved bonding interfaces, enhancing the performance and reliability of integrated circuit packages.
Implementation Method 1
The heat generated by the lower integrated circuit die may be more effectively dissipated during operation
Implementation Method 2
one or more upper integrated circuit dies bonded to a lower integrated circuit die
Data Source
AI summary
An integrated circuit package and the method of forming the same are provided. The integrated circuit package may include a first die. The first die may include a first semiconductor substrate, a first bonding layer over the first semiconductor substrate, and a first die connector in the first bonding layer. The first bonding layer may include a first portion including a first material and a second portion including a second material, wherein the first material is different from the second material. A surface of the first bonding layer may include a surface of the first portion, a surface of the second portion, and a surface of the first die connector.