RF Plasma Injection Chamber Layout for Uniform Low-Temperature Deposition
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Solution Overview
Problem
Existing semiconductor processing operations are inefficient, non-uniform, and limited in capacity and throughput, with issues such as non-uniform film growth, limited gas activation, and unintended dopant diffusion, particularly at low processing temperatures.
Innovation Solution
A plasma injection configuration for process chambers that includes a substrate support, heat sources, RF coils, and a flow housing for controlled gas and plasma injection, allowing for uniform gas activation and deposition at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional heating and gas flow methods are used, then processing can be performed, but gas activation is non-uniform and film growth is non-uniform
Solution Approach 1:
The processing chamber is divided into multiple zones with independent RF coil assemblies positioned at different locations (e.g., upstream, downstream, and radial positions). Each RF coil can be independently controlled to create localized plasma regions, allowing precise control of gas activation patterns across the substrate surface to achieve uniform film growth.
Solution Approach 2:
Different regions of the processing chamber are provided with tailored plasma activation conditions through selectively positioned RF coils. The system creates locally optimized plasma density and energy distribution matched to specific areas of the substrate, ensuring uniform activation and film growth across the entire processing surface.
2Manufacturing precision
If low processing temperatures are used, then dopant diffusion is reduced, but gas activation is limited
Solution Approach 1:
The system decouples temperature and activation parameters by introducing RF-powered plasma as a separate activation mechanism. This allows the processing temperature to be maintained at low levels for precise dopant concentration control while the RF plasma provides the necessary gas activation energy, independently adjusting activation efficiency without compromising temperature control.
Solution Approach 2:
Thermal energy (conventional heating) is replaced with electromagnetic energy (RF plasma) for gas activation. This substitution enables activation of process gases at lower temperatures where thermal mechanisms are insufficient, while maintaining the low temperature environment needed to prevent unwanted dopant diffusion.
3Productivity
If conventional chamber designs are used, then processing can be performed, but throughput and capacity are limited
Solution Approach 1:
The chamber is configured with multiple independently controllable RF coil assemblies that can operate in different modes and patterns. This segmentation allows for rapid switching between processing modes, optimization of plasma distribution for different substrate sizes, and increased throughput through efficient utilization of chamber volume without requiring a complete redesign of the chamber structure.
4Reliability
If higher processing temperatures are used, then gas activation is improved, but unintended dopant diffusion occurs
Solution Approach 1:
Thermal activation is replaced with RF plasma activation, allowing gas activation to occur at lower temperatures. The RF electromagnetic fields provide the energy needed for gas molecule dissociation and ionization without requiring high thermal energy, thus preventing dopant diffusion while maintaining effective gas activation.
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 uniformity and efficiency of film growth, reduces dopant diffusion, and increases throughput by facilitating reliable gas activation and modular operation in semiconductor manufacturing.
Implementation Method 1
one or more radio frequency (RF) coils disposed at least partially around the flow housing
Implementation Method 2
one or more radio frequency (RF) coils disposed at least partially around the flow housing
Implementation Method 3
one or more heat sources operable to heat the processing volume
Data Source
AI summary
The present disclosure relates to plasma injection configurations for process chambers, and related apparatus, chamber kits, and methods for semiconductor manufacturing. In one or more embodiments, a processing chamber applicable for use in semiconductor manufacturing includes one or more sidewalls, a window at least partially defining a processing volume, a substrate support disposed in the processing volume, and one or more heat sources operable to heat the processing volume. The processing chamber includes a flow housing disposed at least partially outwardly of the one or more sidewalls, and one or more radio frequency (RF) coils disposed at least partially around the flow housing.