Dual-Arm Dispense System for Semiconductor Wafer Processing
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Solution Overview
Problem
Existing coat/develop modules in semiconductor processing systems have limited throughput due to the idle dispense system components during substrate rotation, leading to increased costs and footprint, and there is a need for more efficient and accurate processing equipment to handle the complexity of modern semiconductor devices.
Innovation Solution
The implementation of a substrate processing apparatus with two independent dispense arms and rinse arms in a dual-chamber system, allowing for simultaneous fluid dispensing and rinsing during substrate rotation, thereby increasing throughput and reducing system footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single dispense system is used in a coat/develop module, then the system complexity is reduced, but the throughput is limited due to idle dispense components during substrate rotation
Solution Approach 1:
The single dispense system is divided into multiple independent dispense arms (first dispense arm and second dispense arm), each capable of operating independently. This segmentation allows one arm to serve a first processing station while another arm serves a second processing station simultaneously, eliminating idle time and increasing throughput without requiring each individual arm to be overly complex
Solution Approach 2:
Multiple dispense arms are designed with universal functionality to handle different processing stations. Each arm can be configured to dispense various fluids (photoresist, developer, rinse solutions) and can serve multiple purposes across different stations, reducing the need for specialized complex components at each station while maintaining high throughput
2Adaptability or versatility
If multiple dispense nozzles are included for different photoresists and solutions, then the coating versatility is improved, but the dispense system cost increases significantly
Solution Approach 1:
The dispense arms are designed as universal components that can handle multiple coating materials (different photoresists, developers, and rinse solutions) through a single multi-functional unit. This eliminates the need for separate specialized nozzle systems for each material type, reducing overall system cost while maintaining the ability to perform diverse coating operations across multiple processing stations
Solution Approach 2:
The system segments the versatility requirement across multiple independent arms rather than concentrating all material handling capabilities in a single complex system. Each arm can be optimized for specific materials it handles most frequently, reducing the complexity and cost of each individual arm while collectively providing comprehensive coating versatility across the module
3Manufacturing precision
If the dispense system is designed with precise tolerances for quality processing, then the manufacturing precision is improved, but the system cost increases
Solution Approach 1:
The precision requirement is segmented and distributed across multiple independent dispense arms rather than requiring one highly precise universal system. Each arm can be optimized to the specific precision level needed for its assigned processing station, reducing overall system cost while maintaining high manufacturing precision for each individual station through targeted precision design where most needed
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
This approach enables higher wafer processing rates within the same footprint, enhancing system reliability and productivity while minimizing defects and operational costs.
Implementation Method 1
a first dispense arm configured to deliver a fluid to the first processing station
Implementation Method 2
a first rinse arm configured to deliver a rinsing fluid to the first processing station
Implementation Method 3
the spinning action of the spin chuck disperses the liquid over the surface of the substrate
Data Source
AI summary
An apparatus for dispensing fluid during semiconductor substrate processing operations comprises an enclosure having a first side and a second side. The enclosure comprises a first processing station and a second processing station. The second processing station is positioned adjacent to the first processing station. In addition, the substrate processing apparatus includes a first dispense arm configured to deliver a fluid to the first processing station wherein the first dispense arm is positioned between the first side and the first processing station and a second dispense arm configured to deliver the fluid to the second processing station wherein the second dispense arm is positioned between the second side and the second processing station. The substrate processing apparatus also comprises a first rinse arm configured to deliver a rinsing fluid to the first processing station and a second rinse arm configured to deliver the rinsing fluid to the second processing station.