Selective Gas Preheating Chamber for Stable Gas Activation
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Solution Overview
Problem
Existing semiconductor processing methods face challenges in uniformly activating process gases due to inconsistent heating and cooling, which limits process recipe adjustability and degrades certain gases, hindering reliable pre-heating and deposition uniformity.
Innovation Solution
A processing chamber design with a gas assembly that includes an injector with flow openings and heaters to heat process gases before entry, allowing independent pre-heating of gases and using insulation sleeves to reduce cooling, along with resistive heaters and gas line heaters to control gas activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If process gases are heated to activate them, then gas activation is improved, but gas degradation occurs and thermal adjustability is limited
Solution Approach 1:
The patent applies preliminary action by pre-heating process gases in heated gas lines before they enter the processing chamber. This allows gases to be activated in advance at controlled temperatures, preventing degradation during the actual processing operation. The gases are heated to the required activation temperature in the gas delivery system, then maintained at that temperature through the processing chamber.
Solution Approach 2:
The patent implements local quality by providing selective heating zones for different gas lines. Each gas line can be independently heated to different temperatures based on the specific activation requirements of that gas. This allows precise control over which gases are activated and at what temperature, avoiding unnecessary heating that could cause degradation.
2Temperature
If chamber component surfaces cool process gases, then gas cooling occurs, but gas activation is hindered
Solution Approach 1:
The patent applies preliminary anti-action by pre-heating gases to activation temperature before they enter the processing chamber, counteracting the cooling effect that would occur when gases contact cooler chamber surfaces. This preliminary heating ensures gases remain at the required activation temperature throughout the processing operation.
Solution Approach 2:
The patent implements parameter changes by dynamically controlling the temperature of gas lines and chamber surfaces. Heated gas lines maintain gases at high temperatures for activation, while selectively heated chamber surfaces create thermal zones that preserve gas activation. This dynamic parameter control allows gases to be activated and maintained at activation temperature despite contact with chamber components.
3Device complexity
If multiple gases are heated uniformly, then heating simplicity is maintained, but selective activation is prevented
Solution Approach 1:
The patent applies segmentation by dividing the gas heating system into separate, independently controllable zones for different gas lines. Each gas line has its own heating control, allowing selective activation of specific gases based on process requirements. This segmented approach enables complex multi-gas processes while maintaining relatively simple individual heating zones.
Solution Approach 2:
The patent implements dynamics by making the heating system adjustable and controllable for each gas line. The heating parameters (temperature, power level) can be dynamically changed based on which gases need activation at any given time. This dynamic control allows the system to adapt to different process recipes and gas combinations without requiring complete system redesign.
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
Enhances gas activation, increases deposition efficiency, and expands thermal adjustability windows, enabling precise control over deposition processes and reducing maintenance costs.
Implementation Method 1
One or more resistive heaters are disposed within at least one of the one or more flow openings
Implementation Method 2
using insulation sleeves to reduce cooling
Data Source
AI summary
The present disclosure relates to gas injection and pre-heating for selective gas activation, and related chamber kits, methods, and processing chambers. In one or more embodiments, a processing chamber includes a chamber body at least partially defining an internal volume. A substrate support is disposed in the internal volume. A gas assembly is coupled to the chamber body. The gas assembly includes an injector operable to flow a gas into the internal volume. A plurality of gas lines are fluidly connected to the injector and at least one heater is operable to heat the gas.