Wafer Processing Path Switching for Inline SWR Defect Detection
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Solution Overview
Problem
Existing wafer processing machines lack automation to simultaneously detect defects in wafers with different Special Work Request (SWR) conditions, leading to reduced efficiency and increased manual operation risks.
Innovation Solution
A method and apparatus that automatically switch the operating path of wafers between a primary path for semiconductor structure formation and a secondary path for defect detection, allowing for simultaneous detection of defects in wafers with different SWR conditions, thereby improving automation and reducing manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If offline operation is used to detect wafers with different SWR conditions, then defect detection can be performed, but machine efficiency is greatly reduced and manual operation risk increases
Solution Approach 1:
The patent implements dynamic path switching that automatically routes wafers to either the primary processing path or the secondary defect detection path based on their SWR conditions. This dynamic routing eliminates the need for offline operations, allowing defect detection to occur inline without reducing machine efficiency or increasing manual operation risk.
2Reliability
If manual operation is used for defect detection, then defects can be detected, but operation errors increase and automation degree decreases
Solution Approach 1:
The system performs self-service through automatic path switching and defect detection. The determination module automatically identifies wafers requiring defect detection, switches their paths accordingly, and the defect detection module performs the detection without manual intervention. This eliminates operation errors while maintaining high automation degree.
3Device complexity
If a single processing path is used, then the process is simple, but it cannot simultaneously handle wafers needing processing and wafers needing defect detection
Solution Approach 1:
The patent segments the processing system into two distinct paths: a primary path for normal semiconductor structure formation and a secondary path for defect detection. This segmentation allows the system to handle different SWR conditions simultaneously by routing wafers to the appropriate path, maintaining simplicity while increasing versatility.
Data Source
AI summary
The present application relates to the field of semiconductor manufacturing technologies, and in particular to a method and an apparatus for automatically processing wafers. The method for automatically processing the wafers includes the following steps: providing several wafers, wherein the wafers operate on a primary path, and the primary path is a path for forming semiconductor structures on the surfaces of the wafers; determining whether there is a need for detecting defects of the wafers, and if yes, automatically switching an operating path of the wafers to a secondary path; detecting the defects of the wafers in the secondary path; and determining whether the defect detection on the wafers is finished, and if yes, automatically switching the operating path of the wafers to the primary path. The application makes it possible to automatically detect the defects of the wafers with different SWR conditions, thereby improving the automation degree of machines.