Air Cushion Workpiece Loader for Flexible Substrate Handling
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Solution Overview
Problem
Electro-chemical deposition systems face challenges in effectively transporting and handling flexible and thin semiconductor substrates, which can be damaged due to their size, thickness, and flexibility, especially when transitioning between different processing stages.
Innovation Solution
A workpiece handling and loading apparatus that uses parallel plates with gas outlets to create an air cushion, allowing for the secure and damage-free handling and transport of flexible substrates by flattening them without direct contact with the plates, and a clamping mechanism to securely transfer them between a loader module and a workpiece holder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handling methods are used for flexible substrates, then handling simplicity is maintained, but substrate damage occurs due to contact and flexing
Solution Approach 1:
The patent employs parallel plates with gas outlets that generate an air cushion to support and transport flexible substrates without physical contact. This pneumatic system prevents substrate damage while maintaining controlled handling, resolving the contradiction between substrate integrity and handling simplicity.
Solution Approach 2:
The air cushion acts as an intermediary between the parallel plates and the flexible substrate, eliminating direct contact that causes damage. This mediator enables safe handling of delicate substrates while keeping the handling apparatus relatively simple.
2Manufacturing precision
If direct contact handling is used, then device simplicity is maintained, but substrate flatness and quality deteriorate
Solution Approach 1:
The pneumatic system with parallel plates creates an air cushion that maintains substrate flatness during loading and transport. The gas outlets are positioned to provide uniform support across the substrate surface, preventing warping while avoiding direct contact that could cause localized damage.
Solution Approach 2:
The air cushion provides an upward force that counteracts the substrate's tendency to warp or bend under its own weight or during handling, maintaining flatness without requiring mechanical contact points that could cause deformation.
3Reliability
If flexible substrates are handled without support, then handling speed is maintained, but substrate damage increases due to flexing
Solution Approach 1:
The pneumatic support system provides continuous protection to flexible substrates during entire handling and transport processes. The air cushion prevents flexing-induced damage while enabling smooth, continuous movement through the electrochemical deposition system, maintaining productivity.
Solution Approach 2:
The air cushion provides continuous support throughout the substrate's journey through the loading and transport process, eliminating moments of unsupported flexing that could cause damage. This continuous protection enables efficient handling without sacrificing substrate reliability.
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 ensures safe and efficient handling and transport of flexible substrates, reducing the risk of damage and improving the electrochemical deposition process by maintaining substrates in a flat, suspended position, thereby preventing physical contact and potential defects.
Implementation Method 1
Each of the parallel plates is configured to supply an air cushion sufficient to flatten the flexible workpiece and hold the flexible workpiece between the parallel plates without the flexible workpiece contacting planar surfaces of the parallel plates
Data Source
AI summary
Techniques herein provide a workpiece handling and loading apparatus for loading, unloading, and handling relatively flexible and thin substrates for transport and electrochemical deposition. Such a system assists with workpiece holder exchange between a delivery cartridge or magazine, and a workpiece holder. Embodiments include a workpiece handler configured to provide an air cushion to a given workpiece, and maneuvering to a given workpiece holder that can edge clamp the workpiece.