Substrate Transfer Interface for Pattern-Collapse-Free Processing
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Solution Overview
Problem
Existing substrate processing systems face inefficiencies in transitioning between batch and single-wafer processing, leading to increased time and potential damage to substrates due to surface tension and pattern collapse during liquid processing.
Innovation Solution
A substrate processing system with a carry-in/out section, batch processing section, single-wafer processing section, and interface sections that include a standby table and transfer mechanisms to manage substrates horizontally and vertically, using pure water to prevent pattern collapse and improve throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrates are processed in batch mode with liquid immersion, then processing efficiency is improved, but pattern collapse and substrate damage occur due to surface tension
Solution Approach 1:
A transfer mechanism acts as an intermediary between batch and single-wafer processing sections, enabling substrates to be moved individually on their main surfaces while maintaining batch processing capability. This intermediary system prevents pattern collapse by avoiding liquid immersion during transfer operations.
Solution Approach 2:
The processing system is segmented into distinct batch processing and single-wafer processing sections, allowing different processing modes to operate independently and simultaneously. This segmentation enables selective application of liquid processing only where beneficial while avoiding it where harmful.
2Adaptability or versatility
If substrates are transferred between processing sections, then flexibility is improved, but processing time increases due to transition delays
Solution Approach 1:
The transfer mechanism enables continuous substrate movement between batch and single-wafer processing sections without interrupting the overall processing flow. Substrates are transferred on their main surfaces in a continuous manner, eliminating idle time and maintaining productive action throughout the system.
3Manufacturing precision
If substrates are held upright in batch processing, then liquid processing effectiveness is improved, but substrate stability decreases during transfer
Solution Approach 1:
The system dynamically adjusts substrate orientation based on processing requirements. Substrates are held upright during batch liquid processing for effectiveness, then rotated to horizontal orientation on the transfer mechanism for stable movement, and finally positioned appropriately for single-wafer processing. This dynamic reconfiguration optimizes both processing effectiveness and transfer stability.
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
Enhances productivity and minimizes substrate damage by allowing independent operation of transfer devices and maintaining substrate stability during transitions, reducing the risk of pattern collapse and improving overall processing efficiency.
Implementation Method 1
minimizes substrate damage by allowing independent operation of transfer devices and maintaining substrate stability during transitions, reducing the risk of pattern collapse
Data Source
AI summary
A substrate processing system includes: a carry-in/out section in which a cassette accommodating a plurality of substrates is carried in/out; a batch processing section in which a wafer lot including the plurality of substrates is collectively processed in a state where each of the plurality of substrates stand upright; a single-wafer processing section in which the plurality of substrates included in the wafer lot are processed one by one in a horizontal state; and an interface section that delivers the plurality of substrates from the batch processing section to the single-wafer processing section. The interface section includes: a standby table that horizontally holds a substrate in a state of being in contact with pure water; and a transfer mechanism that delivers the substrate from the batch processing section to the standby table.