Variable Volume Gas Diffusion Chamber for Semiconductor Processing
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Solution Overview
Problem
The existing substrate processing methods face challenges in quickly switching between processing gases and controlling the flow rate of gases in semiconductor manufacturing, leading to inefficiencies in gas switching and exhaust times.
Innovation Solution
A substrate processing method that includes a first expanding step, a first gas supplying step, a first plasma processing step, and a first power stopping step, where the gas diffusion chamber volume is increased and then reduced to control the flow rate of gases by varying the position of a top plate, allowing for efficient plasma generation and gas switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gas diffusion chamber volume is kept constant, then the structure is simple, but the gas flow rate control is insufficient
Solution Approach 1:
The patent applies the dynamics principle by making the gas diffusion chamber volume variable through a movable top plate. The top plate can be positioned at different heights to adjust the chamber volume dynamically, enabling precise control of gas flow rates during plasma processing. This transforms a static chamber into a dynamic system that adapts to different processing requirements.
Solution Approach 2:
The patent implements parameter changes by varying the volume of the gas diffusion chamber as a controllable parameter. By adjusting the chamber volume, the system can control the gas flow rate to the processing chamber, providing a new degree of freedom for process optimization without requiring complex valve systems.
2Speed
If conventional gas switching methods are used, then the system is simple to operate, but the gas switching time is long
Solution Approach 1:
The patent applies preliminary action by pre-positioning the top plate at different heights corresponding to different gas flow rates. When gas switching is needed, the system can quickly move the top plate to the pre-determined position, avoiding the need for complex valve switching and exhaust procedures. This prepares the system in advance for rapid response.
Solution Approach 2:
The patent extracts the gas flow control function from the traditional valve system and implements it through the variable volume chamber mechanism. By removing the dependency on complex valve switching for gas flow adjustment, the system achieves faster gas switching through a simpler mechanical motion.
3Adaptability or versatility
If the top plate position is fixed, then the chamber structure is stable, but the gas flow rate cannot be adjusted
Solution Approach 1:
The patent implements universality by making the top plate serve multiple functions: it acts as both a structural component defining the chamber volume and as a flow control mechanism. This single movable component provides both structural integrity and adjustable gas flow control, eliminating the need for separate control mechanisms.
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 method enables faster gas switching and reduced exhaust times, allowing for precise control of gas flow rates and improved processing efficiency in semiconductor manufacturing.
Implementation Method 1
a first plasma processing step supplies radio-frequency power from a radio-frequency power supply to generate plasma in a processing chamber accommodating a substrate
Data Source
AI summary
A substrate processing method includes a first expanding step, a first gas supplying step, a first plasma processing step, and a first power stopping step. The first expanding step increases the volume of a gas diffusion chamber. The first gas supplying step supplies a first gas into the gas diffusion chamber. The first plasma processing step supplies radio-frequency power from a radio-frequency power supply to generate plasma in a processing chamber accommodating a substrate and reduces the volume of the gas diffusion chamber. The first power stopping step stops the supply of the radio-frequency power after the first plasma processing step.