Heterogeneous Virtual Sinter Joint Model for Bond Assessment
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Solution Overview
Problem
Conventional methods for assessing high temperature bonding systems, such as transient liquid phase sintering, rely on homogeneous virtual models that are inaccurate due to computational power restrictions, failing to simulate the heterogeneous nature of real-world bond microstructures effectively, which affects the assessment of mechanical, thermal, and electrical properties.
Innovation Solution
The development of a method using heterogeneous virtual models to simulate the interconnect microstructure of high temperature bonding systems, where sinter joint objects such as intermetallic compounds, voids, and metal particles are placed in a virtual joint space with non-overlapping three-dimensional coordinates, allowing for the creation of a sinter joint model that can be analyzed for thermal, electrical, and mechanical properties without excessive computational power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If homogeneous virtual models are used to simulate high temperature bonding systems, then computational power requirements are reduced, but the accuracy of simulating heterogeneous real-world bond microstructures deteriorates
Solution Approach 1:
The patent segments the complex heterogeneous microstructure into multiple discrete sinter joint objects (metal particles, intermetallic compounds, voids) with different material properties. Each object is individually defined with specific coordinates, sizes, and material characteristics, allowing the simulation to capture microstructural heterogeneity without requiring excessive computational resources by treating each segment independently rather than modeling the entire heterogeneous system as a single complex continuum.
Solution Approach 2:
The patent assigns different material properties and characteristics to different regions and objects within the virtual model. Each sinter joint object has locally defined properties (material type, size, shape, position) that reflect the actual heterogeneous nature of the microstructure. This local quality approach allows accurate representation of property variations at the microscale while maintaining computational efficiency through localized rather than global complexity.
2Measurement precision
If heterogeneous virtual models are used to simulate high temperature bonding systems, then the accuracy of simulating real-world bond microstructures is improved, but computational power requirements increase excessively
Solution Approach 1:
The patent creates a virtual copy of the heterogeneous microstructure using simplified geometric representations (sinter joint objects) that capture the essential features without requiring full physical fidelity. These virtual objects replicate the key characteristics (material type, size, position, shape) of actual microstructural features, providing sufficient accuracy for assessing mechanical, thermal, and electrical properties while maintaining computational tractability through idealized geometries.
Solution Approach 2:
The patent changes the representation parameters from continuous complex field distributions to discrete object-based parameters (coordinates, sizes, material properties of individual sinter joint objects). This parameter transformation allows the model to capture heterogeneity through a finite set of well-defined parameters rather than requiring resolution of continuous complex variations, significantly reducing computational requirements while preserving essential microstructural information.
3Ease of manufacture
If conventional bonding methods are used, then the bonding layer can be formed, but the bond strength and reliability at high operating temperatures are insufficient
Solution Approach 1:
The patent performs preliminary virtual assessment of bonding parameters, microstructure formation, and property development through simulation before actual manufacturing. By modeling the sintering process and predicting microstructural outcomes (intermetallic compound formation, void distribution, particle arrangement) in advance, the methodology enables optimization of bonding conditions to ensure high temperature reliability while maintaining manufacturing feasibility.
Solution Approach 2:
The patent replaces physical trial-and-error experimentation with computational simulation and analysis. Instead of repeatedly manufacturing and testing bonded joints to assess reliability, the virtual model substitutes mechanical testing with computational assessment of mechanical, thermal, and electrical properties, enabling prediction of high temperature performance without requiring excessive physical prototypes or extensive experimental validation.
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 enables the creation of a stronger bond layer by accurately simulating the behavior of high temperature bonding systems, enhancing mechanical, thermal, and electrical performance, and maximizing system reliability through the analysis of simulated properties.
Implementation Method 1
a method for assessing an interconnect microstructure of a virtual assembly of a high temperature bonding of substrates includes a plurality of sinter joint objects in the interconnect microstructure of the virtual assembly
Implementation Method 2
The location is determined by, for each individual sinter joint object, creating three-dimensional coordinates for the sinter joint object
Implementation Method 3
computational power restrictions have prevented the use of heterogeneous virtual models, which would provide for a more accurate simulation of a formed real world bond and its associated mechanical, thermal, and electrical properties
Data Source
AI summary
Methods and apparatuses for assessing the behavior of high temperature bonding systems such as sinter joint models of virtual interconnect microstructures via simulations that analyze sinter joint model properties include defining a plurality of sinter joint objects in a virtual interconnect microstructure, each sinter joint object having a type and a size, and determining a location of individual sinter joint objects with respect to one another in a virtual joint space to create a sinter joint model. The type is at least one of an intermetallic compound, a void, and a metal particle. The location is determined by, for each object, creating three-dimensional coordinates, and based on a determination that the sinter joint object is spaced from and non-overlapping with previously placed sinter joint objects, locking a position and size of the sinter joint object.