Layered Substrate Shuttle Transfer for Smaller Fab Footprints
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Solution Overview
Problem
Existing substrate transfer apparatuses in semiconductor and display processes occupy large areas, limiting the number of equipment that can be accommodated in a factory, and thus, reducing productivity and increasing costs.
Innovation Solution
A substrate transfer apparatus with a compact design that includes a first and second moving plate, a shuttle for substrate movement, and layer transfers with a spiral shape to facilitate movement between layers, utilizing magnetic levitation rails for efficient shuttle movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional substrate transfer apparatuses are used, then substrate transfer function is provided, but the equipment occupies large area reducing productivity
Solution Approach 1:
The patent introduces a vertical dimension by stacking multiple moving plates (first moving plate, second moving plate, third moving plate) at different heights. The layer transfer mechanism enables shuttle movement between these vertical layers, effectively utilizing three-dimensional space instead of conventional two-dimensional horizontal layout. This dimensional transition reduces the horizontal footprint while maintaining substrate transfer capacity, directly resolving the contradiction between equipment area and productivity.
Solution Approach 2:
The patent implements a nested structure where multiple moving plates are stacked vertically with each plate containing processing chambers and shuttles. The layer transfer mechanism nests the movement functionality within the compact stacked configuration. This nesting approach allows multiple substrate transfer operations to occur in a vertically integrated space, significantly reducing the overall equipment footprint while enhancing processing capacity through parallel vertical operations.
2Productivity
If equipment area is reduced to enhance productivity, then space efficiency improves, but movement time between layers must be minimized
Solution Approach 1:
The patent employs magnetic levitation technology to enable continuous, smooth movement of shuttles between moving plates without mechanical contact or interruption. The magnetic fields are continuously maintained to propel and guide shuttles along the movement path, eliminating start-stop mechanical operations. This continuous action reduces movement time between layers while maintaining compact equipment dimensions, thereby improving processing amount per unit area without sacrificing speed.
Solution Approach 2:
The patent replaces conventional mechanical drive systems with magnetic levitation fields for shuttle movement. Instead of mechanical motors, gears, or belts that require physical contact and have inherent friction and inertia limitations, the system uses magnetic fields to levitate and propel shuttles. This substitution eliminates mechanical constraints, reduces movement time, and enables smoother, faster transitions between vertical layers within the compact apparatus structure.
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 apparatus enhances processing capacity in limited areas by reducing the footprint of substrate transfer equipment, optimizing space usage, and improving production line efficiency, thereby reducing costs and increasing productivity.
Implementation Method 1
each of the first moving plate and the second moving plate includes a magnetic levitation rail, and wherein the shuttle is magnetically levitated by the magnetic levitation rails to be moved on the first moving plate or the second moving plate
Data Source
AI summary
Disclosed is a substrate transfer apparatus including a first moving plate, a second moving plate located on a lower side of the first moving plate, a shuttle that is moved on the first moving plate or the second moving plate and that accommodates a substrate, and a first layer transfer connected to the first moving plate and the second moving plate, and that moves the shuttle from any one of the first moving plate and the second moving plate to the other one.