Bonding Tool Heat-Resistant Coating for Semiconductor Substrate Protection
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Solution Overview
Problem
Conventional bonding tools in the semiconductor packaging industry often transfer heat to areas of the substrate not intended for bonding, affecting the characteristics of those areas and compromising the bonding process.
Innovation Solution
A bonding tool with a heat-resistant coating applied to non-contact regions, reducing heat transfer to adjacent areas of the substrate, is used to minimize heat radiation and conduction to unbonded pads or areas during the bonding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the bonding tool is heated to bond semiconductor elements, then the bonding process is enabled, but heat is transferred to non-bonding areas of the substrate causing harmful effects
Solution Approach 1:
The bonding tool incorporates regions with different thermal properties: the contact region has high thermal conductivity to efficiently transfer heat to the semiconductor element for bonding, while the non-contact region has low thermal conductivity (heat-resistant coating) to minimize heat transfer to non-bonding substrate areas. This spatial differentiation of thermal properties resolves the contradiction between enabling bonding and preventing harmful heat transfer.
Solution Approach 2:
The bonding tool body is divided into distinct functional regions: a contact region that interfaces with the semiconductor element and a non-contact region that faces the substrate but does not touch it. Each region is assigned different material properties (high vs. low thermal conductivity) to perform its specific function, thereby solving the heat transfer problem while maintaining bonding capability.
2Object-affected harmful factors
If heat-resistant coating is applied to non-contact region, then heat transfer to substrate is reduced, but device complexity increases
Solution Approach 1:
The bonding tool uses composite construction with different material regions: the contact region is made of high thermal conductivity material for efficient heat transfer to the die, while the non-contact region is coated with heat-resistant material (low thermal conductivity) to protect the substrate. This composite approach achieves heat control without requiring complex active cooling systems or multiple separate components.
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
The heat-resistant coating effectively reduces heat radiation and conduction to non-bonding areas of the substrate, enhancing the reliability and robustness of the bonding process by maintaining the integrity of substrate materials and metallization.
Implementation Method 1
reducing heat transfer to adjacent areas of the substrate, is used to minimize heat radiation and conduction to unbonded pads or areas during the bonding process
Implementation Method 2
reducing heat transfer to adjacent areas of the substrate, is used to minimize heat radiation and conduction to unbonded pads or areas during the bonding process
Data Source
AI summary
A bonding tool for bonding a semiconductor element to a substrate on a bonding machine is provided. The bonding tool includes a body portion including a contact region for contacting the semiconductor element during a bonding process on the bonding machine. The body portion defines a non-contact region adjacent the contact region. The bonding tool also includes a heat resistant coating applied to the non-contact region.