Wafer Bond Monitoring Using Video Defect Detection
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Solution Overview
Problem
Current wafer bonding processes often detect bonding defects only after completion, leading to significant time and cost expenditures in mitigating improper bonding, and potential scrapping of wafers.
Innovation Solution
Implementing a real-time monitoring system using video cameras and machine learning techniques to analyze video data of the bonding process, allowing for immediate detection of defects during wafer bonding by observing bonding wave propagation and comparing with historical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If real-time monitoring system with video cameras and machine learning is implemented, then bonding defect detection capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical inspection systems with a combination of video cameras and machine learning algorithms. The machine learning model processes video data to detect bonding defects, substituting what would traditionally require complex mechanical measurement and inspection equipment. This achieves high reliability defect detection while avoiding the complexity of precision mechanical systems.
2Loss of time
If real-time monitoring is implemented during wafer bonding, then loss of time is reduced, but use of energy increases
Solution Approach 1:
The monitoring system operates continuously throughout the wafer bonding process, capturing video data in real-time without interrupting the bonding operation. This continuous monitoring enables immediate defect detection while the bonding process proceeds, eliminating the need for separate inspection steps and reducing total process time. The system processes video frames continuously using machine learning to maintain real-time detection capability.
Data Source
AI summary
Systems and methods are provided for monitoring wafer bonding and for detecting or determining defects in a wafer bond formed between two semiconductor wafers. A wafer bonding system includes a camera configured to monitor bonding between two semiconductor wafers. Wafer bonding defect detection circuitry receives video data from the camera, and detects a bonding defect based on the received video data.