Semiconductor Gas Inlet Switching for Process Uniformity
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Solution Overview
Problem
In plasma processing devices, the residual process gas in the edge gas inlet mechanism's uniform-flow chamber can mix with the first process gas in the reaction chamber, affecting process uniformity when alternately introducing different gases.
Innovation Solution
A semiconductor processing device with a second gas inlet mechanism featuring a uniform-flow chamber and switch elements in the gas outlets, which isolates the chamber from the reaction chamber when no process gas is being delivered, preventing residual gas from entering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the edge gas inlet mechanism maintains continuous communication with the reaction chamber through gas outlets, then the gas inlet mechanism can always be ready to deliver process gas, but residual process gas remains inside the uniform-flow chamber and mixes with the first process gas in the reaction chamber, affecting process uniformity
Solution Approach 1:
The switch element is activated in advance before gas delivery begins, closing the gas outlets to isolate the uniform-flow chamber. This preliminary isolation prevents residual gas from mixing with the incoming first process gas, ensuring process uniformity while maintaining the ability to quickly deliver gas when needed
Solution Approach 2:
The gas inlet mechanism transitions from a static continuous communication state to a dynamic state with controllable isolation. The switch element enables the system to dynamically adjust the communication state between the uniform-flow chamber and reaction chamber, isolating when necessary to prevent gas mixing and maintaining readiness for rapid gas delivery
2Manufacturing precision
If the uniform-flow chamber is isolated from the reaction chamber when no process gas is being delivered, then residual gas mixing is prevented, but the gas inlet mechanism cannot quickly respond to deliver process gas
Solution Approach 1:
The switch element is pre-positioned and can be rapidly actuated to open the gas outlets. This preliminary preparation ensures that when process gas delivery is needed, the isolation is quickly removed and gas flow begins immediately, maintaining both process uniformity and rapid response capability
Solution Approach 2:
The switch element acts as an intermediary mechanism between the uniform-flow chamber and reaction chamber. It provides controlled access that can be rapidly opened or closed, mediating between the need for isolation to prevent gas mixing and the need for rapid response to deliver process gas when required
Data Source
AI summary
A semiconductor processing device is provided. The device includes a reaction chamber, a first gas inlet mechanism, and a second gas inlet mechanism that includes a gas inlet, a uniform-flow chamber, at least one gas outlet, and at least one switch element. The gas inlet communicates with the uniform-flow chamber and arranged to deliver a process gas into the uniform-flow chamber. The at least one gas outlet is between the reaction chamber and the uniflow-flow chamber. The at least one switch element is disposed in each gas outlet and arranged to enable the uniform-flow chamber to communicate with the reaction chamber when the process gas is being delivered into the uniform-flow chamber through the gas inlet, and to isolate the uniform-flow chamber from the reaction chamber when no process gas is being delivered into the uniform-flow chamber.