Semiconductor Process Chamber Segmentation for Gas Stability
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Solution Overview
Problem
In semiconductor device manufacturing, the supply of source gases for unit processes in a single process chamber is unstable, leading to increased sheet resistance and non-uniform thickness of deposited layers, which affects the quality and reliability of the barrier layer formation.
Innovation Solution
A method is introduced where a substrate undergoes multiple unit processes in a single process chamber with independent pressure control for each section, followed by cleaning processes that reduce the pressure to exhaust levels to remove residual gases and byproducts, ensuring stable gas supply and improved layer formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple unit processes are performed in a single process chamber, then productivity is improved by reducing vacuum break between processes, but source gas supply stability deteriorates leading to increased sheet resistance and non-uniform thickness
Solution Approach 1:
The single process chamber is divided into multiple independent process sections, each capable of performing different unit processes. Each section has its own source gas supply system, allowing stable gas supply for each process while maintaining continuous operation without vacuum breaks between processes.
Solution Approach 2:
Each process section within the single chamber is equipped with dedicated source gas supply mechanisms tailored to specific process requirements. This localized gas supply system ensures optimal gas flow and composition for each unit process, preventing the sheet resistance and thickness uniformity issues that arise from shared gas supply systems.
2Productivity
If multiple unit processes are performed in a single process chamber, then productivity is improved, but manufacturing precision deteriorates due to non-uniform thickness of deposited layer
Solution Approach 1:
The process chamber is segmented into multiple independent sections, each with its own deposition control system. This allows precise control of deposition parameters for each unit process, ensuring uniform thickness even when multiple different processes are performed sequentially within the same chamber.
Solution Approach 2:
Each process section has localized control mechanisms for source gas flow, temperature, and deposition rate. This local quality control ensures that each unit process achieves the required thickness uniformity independently, preventing the quality degradation that would result from a single shared control system.
3Productivity
If multiple unit processes are performed in a single process chamber, then productivity is improved, but manufacturing precision deteriorates due to increased sheet resistance
Solution Approach 1:
The chamber is divided into separate process sections, each with dedicated source gas supply and process control systems. This segmentation allows each unit process to maintain optimal gas flow and reaction conditions, ensuring consistent electrical properties and sheet resistance for the deposited layers.
Solution Approach 2:
Each process section implements localized control of source gas composition, flow rate, and reaction parameters. This local quality assurance ensures that each deposition process achieves the target sheet resistance values, preventing the electrical property degradation that occurs when multiple processes share a single gas supply system.
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 enhances the reliability of the barrier layer formation by maintaining uniformity and reducing defects, thereby increasing the operational period and efficiency of the manufacturing apparatus.
Implementation Method 1
cleaning processes that reduce the pressure to exhaust levels to remove residual gases and byproducts
Implementation Method 2
Various deposition processes based on chemical reactions of source materials have been utilized for forming the WN layer
Data Source
AI summary
In a method of manufacturing a semiconductor device, a substrate is loaded to a process chamber having, unit process sections in which unit processes are performed, respectively. The unit processes are performed on the substrate independently from one another at the unit process sections under a respective process pressure. The substrate sequentially undergoes the unit processes at the respective unit process section of the process chamber. Cleaning processes are individually performed to the unit process sections, respectively, when the substrate is transferred from each of the unit process sections and no substrate is positioned at the unit process sections. Accordingly, the process defects of the process units may be sufficiently prevented and the operation period of the manufacturing apparatus is sufficiently elongated.