Bonding Head Manifold With Reducing Gas for Copper Oxidation Control
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Solution Overview
Problem
Existing semiconductor packaging technologies face challenges in providing an environment suitable for bonding semiconductor elements to substrates, particularly due to oxidation and contamination of copper structures, which can be addressed by using a reducing gas.
Innovation Solution
A bonding system with a reducing gas delivery system that includes a manifold with defined reducing gas and exhaust ports to provide reducing gas and remove reaction products, enhancing the bonding environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional bonding processes are used without reducing gas, then the process is simple and fast, but oxidation and contamination of copper structures occur
Solution Approach 1:
A reducing gas delivery system with manifold and ports is introduced as an intermediary component between the bonding surfaces. This mediator provides reducing gas to the bonding area during the bonding process, preventing oxidation and contamination of copper structures while maintaining bonding quality.
Solution Approach 2:
The patent creates a controlled reducing atmosphere environment at the bonding area by delivering reducing gas through the manifold system. This inert-like environment protects the copper structures from oxidation during bonding, improving reliability without requiring complete system vacuum or complex sealing.
2Reliability
If reducing gas is provided to prevent oxidation, then bonding quality improves, but the system complexity and gas delivery requirements increase
Solution Approach 1:
The gas delivery system is segmented into distinct functional components: a manifold with multiple ports, reducing gas delivery ports positioned at the bonding area, and exhaust ports. This segmentation allows precise control of reducing gas delivery only where needed, rather than requiring complex system-wide gas management.
Solution Approach 2:
The reducing gas is delivered locally to the bonding area through specifically positioned ports in the manifold, rather than requiring a completely controlled atmosphere throughout the entire system. This local quality approach provides oxidation protection exactly where copper structures are present while minimizing overall system complexity.
3Reliability
If reducing gas delivery system is added, then oxidation control improves, but manufacturing complexity increases
Solution Approach 1:
The manifold serves multiple functions simultaneously: it distributes reducing gas through multiple ports, provides structural support for the bonding tool, and facilitates exhaust removal. This multi-functionality reduces the need for separate components, simplifying manufacturing compared to systems with dedicated separate systems for each function.
Solution Approach 2:
The reducing gas delivery system is merged with the bonding tool structure through the manifold integration. The manifold becomes part of the bonding head assembly, combining gas delivery functionality with the mechanical bonding interface, thereby reducing the number of separate components and simplifying manufacturing.
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 system effectively reduces oxidation and contamination, improving the bonding process by providing a controlled environment for semiconductor elements and substrates.
Implementation Method 1
it is desirable to provide an environment suitable for bonding. Conventionally, such an environment may be provided by using a reducing gas at the bonding area to reduce potential oxidation and/or contamination of the electrically conductive structures
Implementation Method 2
a reducing gas delivery system for providing a reducing gas to a bonding area of the bonding system, the reducing gas delivery system including a manifold
Implementation Method 3
an exhaust port for removing a reaction product from the bonding area
Data Source
AI summary
A bonding system for bonding a semiconductor element to a substrate is provided. The bonding system includes a bond head assembly including a bonding tool configured for bonding the semiconductor element to the substrate. The bonding system also includes a reducing gas delivery system for providing a reducing gas to a bonding area of the bonding system. The reducing gas delivery system includes a manifold. The manifold includes a lower surface defining (i) a reducing gas port for providing the reducing gas to the bonding area, and (ii) an exhaust port for removing a reaction product from the bonding area.