Selective Gas Heating Density for Epitaxial Growth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge in semiconductor device manufacturing is to reduce the thermal budget while maintaining superior performance, as smaller device sizes and tighter design rules require more precise control over process gases and temperature during selective epitaxial growth processes.
Innovation Solution
A substrate treating apparatus with a wafer chuck, injector unit, and gas supply system that allows for selective temperature control of process gases through varying heating unit densities on gas supply lines, enabling precise temperature management for different gases to optimize the epitaxial growth process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If uniform heating is applied to all gas supply lines, then thermal budget is reduced, but process selectivity and gas temperature control precision deteriorate
Solution Approach 1:
The patent applies local quality by providing different heating unit densities on different gas supply lines according to the specific temperature requirements of each process gas. The first gas supply line receives heating units with a first density, while the second gas supply line receives heating units with a second density, enabling precise temperature control for each gas type without uniformly heating all lines, thus maintaining thermal budget efficiency while achieving process selectivity.
2Manufacturing precision
If heating unit density is increased on gas supply lines, then gas temperature control precision is improved, but device complexity and system cost increase
Solution Approach 1:
Instead of uniformly increasing heating unit density across all gas supply lines, the patent applies heating units with different densities locally optimized for each gas supply line's specific temperature control requirements. This approach achieves the necessary temperature precision for each process while avoiding the unnecessary complexity and cost of uniformly high heating density throughout the entire system.
3Productivity
If selective temperature control is implemented for different process gases, then process selectivity and epitaxial growth efficiency are improved, but gas supply system complexity increases
Solution Approach 1:
The patent implements selective temperature control by assigning different heating unit densities to different gas supply lines based on the specific temperature requirements of each process gas. This localized approach enables optimized epitaxial growth efficiency for each gas type while keeping the overall system complexity manageable through a modular gas supply architecture rather than requiring a completely redesigned complex system.
Solution Approach 2:
The gas supply system is segmented into multiple independent gas supply lines, each with its own heating unit configuration optimized for the specific process gas it carries. This segmentation allows selective temperature control for different gases (enabling efficient epitaxial growth) while maintaining a manageable system structure through modular, independent line configurations rather than a monolithic complex 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 enables precise temperature control of process gases, enhancing the selectivity and efficiency of semiconductor device manufacturing by adjusting gas temperatures based on process conditions, thereby reducing thermal budget and improving device performance.
Implementation Method 1
first heating units disposed on the first gas supply line and second heating units disposed on the second gas supply line
Data Source
AI summary
Disclosed is a substrate treating apparatus comprising a wafer chuck on which a substrate is placed, an injector unit on a side of the wafer chuck and injecting process gases that include a first gas and a second gas, and a gas supply unit supplying the process gases to the injector unit. The gas supply unit comprises first and second gas supply sources that respectively accommodate the first and second gases, first and second gas supply lines that respectively connect the first and second gas supply sources to the injector unit, and first and second heating units that are respectively disposed on the first and second gas supply lines. The first heating units disposed on the first gas supply line have a density per unit length greater than the density per unit length of the second heating units disposed on the second gas supply line.