Outer Cup Protrusion for Solution Containment in Substrate Processing
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Solution Overview
Problem
In semiconductor and flat display panel manufacturing, the scattering of treatment solutions during the development process leads to contamination of substrates in adjacent cups, causing process failures due to the close spacing of cups in the development chamber.
Innovation Solution
A substrate treating apparatus with outer cups featuring protrusions on their sidewalls to direct treatment solutions inward, minimizing scattering and contamination, and a nozzle arm and transfer robot design to support precise substrate handling and solution application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple cups are arranged in a row within a single chamber to increase processing capacity, then productivity is improved, but treatment solution scatters into adjacent cups causing contamination
Solution Approach 1:
A partition wall is introduced as an intermediary structure between adjacent cups to prevent treatment solution from scattering into neighboring cups. The partition wall acts as a physical barrier that separates the processing spaces while allowing each cup to maintain its independent treatment environment, thus eliminating cross-contamination between substrates processed in adjacent cups.
Solution Approach 2:
The partition wall is strategically positioned only at specific locations where solution scattering is most likely to occur, rather than completely enclosing each cup. This localized separation approach maintains adequate spacing between cups for substrate access while providing contamination prevention exactly where needed, optimizing both productivity and contamination control.
2Productivity
If cups are spaced closer together to increase the number of cups in a chamber, then productivity is improved, but treatment solution easily scatters to adjacent cups
Solution Approach 1:
The partition wall serves as a reliable intermediary that ensures consistent separation between adjacent cups even when they are positioned close together. This structural mediator guarantees that treatment solution remains contained within its designated cup throughout the processing cycle, preventing process failures due to contamination regardless of the reduced spacing between cups.
3Object-affected harmful factors
If partition walls are added between cups to prevent solution scattering, then contamination is reduced, but device complexity increases
Solution Approach 1:
Rather than implementing complete enclosures or complex multi-component partition systems, the solution uses simple, localized partition walls only at the critical interfaces between adjacent cups. This minimalistic approach provides effective contamination prevention with minimal added structural complexity, maintaining ease of manufacturing and operation.
Data Source
AI summary
Disclosed is an apparatus for treating a substrate, the apparatus including: a housing having an inner space; a plurality of outer cups arranged in a row in the inner space, each having a processing space; a spin chuck for supporting and rotating a substrate in each of the processing spaces; and a treatment solution nozzle provided in a plurality to correspond to the plurality of outer cups, respectively, and for supplying a treatment solution onto the substrate supported by the spin chuck, in which the outer cup includes a sidewall surrounding the spin chuck, the sidewall includes a first region and a second region located adjacent to each other along a circumferential direction thereof, and the outer cup includes a first protrusion installed in the first region while extending upwardly on a top end of the sidewall.