Etching Apparatus Turn Stoppers Compact Layout
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Solution Overview
Problem
Existing wet etching apparatuses for flat panel display manufacturing are not compact, leading to larger factory requirements and increased risk of substrate damage during transfer due to linear device arrangement.
Innovation Solution
A compact etching apparatus with turn stages and stoppers having different diameters at upper and lower ends to prevent substrate damage, allowing for perpendicular transfer and minimizing contact with stoppers, thereby reducing friction and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If devices are arranged linearly as in related art wet etching apparatus, then the layout is simple and easy to implement, but the overall layout cannot be compact and requires larger factory space
Solution Approach 1:
The patent transitions from a linear one-dimensional arrangement to a two-dimensional planar layout by introducing turn stages that change substrate transfer direction by 90 degrees. This dimensional change allows devices to be arranged in a compact rectangular footprint rather than requiring a long linear sequence, significantly reducing the overall layout area while maintaining functional simplicity.
Solution Approach 2:
The turn stages are strategically positioned between processing devices to nest the substrate transfer path within the compact layout. By placing turn stages at intermediate positions and routing substrates through them, the patent creates a nested transfer path that fits within a smaller overall footprint compared to linear arrangement.
2Reliability
If substrates are transferred through linear arrangement of devices, then the transfer path is simple, but the risk of substrate damage or breakage increases
Solution Approach 1:
Turn stages serve as intermediary transfer mechanisms between processing devices. Instead of direct linear transfer that requires precise alignment and creates high stress points, the turn stages act as intermediate buffers that gradually redirect substrates, reducing mechanical stress and the risk of breakage while adding only moderate complexity to the transfer system.
Solution Approach 2:
The turn stages provide beforehand cushioning by preparing the substrate transfer path with gradual direction changes rather than abrupt redirects. This preemptive approach to transfer path design reduces the likelihood of substrate damage before it can occur during linear-to-perpendicular transitions.
3Manufacturing precision
If stoppers with uniform diameter are used to prevent excessive substrate introduction, then the structure is simple, but friction and substrate deformation increase
Solution Approach 1:
The stopper structure transitions from a uniform cylindrical shape to an asymmetric design with different diameters at upper and lower ends. This asymmetric geometry allows the stopper to contact the substrate at optimized points that minimize friction and deformation while still effectively preventing excessive introduction. The larger diameter at one end provides structural strength while the smaller diameter at the other end reduces contact friction.
Solution Approach 2:
Different portions of the stopper are given different diameters to optimize local functions: the larger diameter portion provides structural support and effective blocking, while the smaller diameter portion reduces friction during substrate introduction. This local differentiation of geometric properties allows the stopper to simultaneously achieve both protective and low-friction functions.
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 solution enables a more compact layout and reduces substrate damage during transfer, improving manufacturing efficiency and yield by using turn stages and stoppers with trapezoidal or inverted-trapezoidal shapes to prevent excessive introduction and contact.
Implementation Method 1
an air knife for drying the substrate
Implementation Method 2
a DI rinsing device for rinsing fine particles generated during the etching process
Implementation Method 3
The wet etching method etches a layer to be etched, into a desired form using a chemical solution that chemically reacts with and melts the target layer
Data Source
AI summary
Disclosed herein are an apparatus and method for manufacturing a flat panel display device. The apparatus and method for manufacturing a flat panel display device contribute to a compact apparatus for etching a substrate and damage or breakage prevention of the substrate during the transfer of the substrate by virtue of stoppers. The etching apparatus comprises a loader for loading or unloading a substrate, an etching device for etching the substrate into a desired shape, a DI rinsing device for rinsing fine particles and etchant generated during the etching process from the etched substrate, an air knife for drying the rinsed substrate, and one or more turn stages provided at one or more locations between the above respective devices, and adapted to change a transfer direction of the substrate.