Semiconductor Substrate Transfer Bypassing Defective Treatment Sections
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Solution Overview
Problem
In semiconductor manufacturing, existing substrate treatment systems fail to detect abnormalities in real-time, leading to continuous production of defective wafers due to delayed identification of defects in treatment sections, which decreases productivity and increases stop times when abnormalities are detected.
Innovation Solution
A substrate treatment apparatus with a defect inspection section, classification means, storage for transfer routes, and control mechanisms to classify defects and bypass abnormal treatment sections, allowing for real-time identification and prevention of defective wafer production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If inspection results over multiple lots are collected before judgment, then defect classification accuracy is improved, but real-time abnormality detection capability deteriorates
Solution Approach 1:
The patent segments the defect inspection process into two distinct pathways: a rapid single-lot inspection mode for real-time abnormality detection, and a comprehensive multi-lot inspection mode for accurate defect classification. This segmentation allows the system to choose the appropriate inspection depth based on whether real-time detection or classification accuracy is the priority, resolving the contradiction between speed and precision.
2Productivity
If the coating and developing treatment apparatus continues operation until abnormality judgment, then productivity is maintained, but production of defective wafers increases
Solution Approach 1:
The patent implements preliminary action by performing rapid single-lot inspections continuously during apparatus operation to detect abnormalities in real-time, before they propagate through the production line. This early detection mechanism allows for timely intervention to prevent mass production of defective wafers, while maintaining overall apparatus productivity through quick diagnostics and targeted maintenance.
3Measurement precision
If comprehensive defect inspection is performed, then defect specification accuracy is improved, but inspection time and system complexity increase
Solution Approach 1:
The patent applies dynamics by making the inspection system adaptive and flexible, allowing it to switch between single-lot rapid inspection mode and multi-lot comprehensive inspection mode based on operational needs. This dynamic capability enables the system to optimize between speed and accuracy, maintaining high defect specification accuracy when needed while reducing inspection time and complexity during normal production operations.
Data Source
AI summary
A coating and developing treatment apparatus includes a substrate transfer mechanism; and a defect inspection section. A transfer control part controls transfer of a substrate. A defect classification part classifies a defect based on the state of the defect. A storage part stores a transfer route of the substrate by the substrate transfer mechanism when the substrate has been treated by treatment sections. A defective treatment specification part specifies, based on a kind of the defect classified by the defect classification part and the transfer route of the substrate stored in the storage part, a treatment section which is a cause of occurrence of the classified defect, and judges presence or absence of an abnormality of the specified treatment section. The transfer control part controls the substrate transfer mechanism to transfer a substrate bypassing the treatment section which has been judged to be abnormal by the defective treatment specification part.