Etching Chamber Temperature Zoning for Uniform Polymer Layers
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Solution Overview
Problem
In semiconductor manufacturing, the non-uniform formation of polymer layers on capacitor holes due to temperature and condition differences across a wafer leads to varying morphologies, causing issues in the etching process.
Innovation Solution
A method involving a simulated wafer with a temperature control device to condition the etching chamber, forming and measuring polymer layers, and adjusting the temperature to achieve uniform thickness distribution, ensuring consistent polymer layer formation across the wafer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If temperature control is applied uniformly across the wafer, then the etching process is simple to control, but polymer layer thickness varies in different regions due to temperature differences
Solution Approach 1:
The patent segments the wafer into multiple temperature zones with independent control parameters. Instead of applying a single uniform temperature setting, the system divides the processing area and applies localized temperature adjustments based on measured polymer layer thickness variations in each segment, thereby achieving uniform results across the entire wafer.
Solution Approach 2:
The patent transitions from static uniform temperature control to dynamic zone-specific temperature control. Temperature settings are adjusted dynamically based on real-time measurements of polymer layer thickness, allowing the system to adapt to local variations and maintain optimal conditions across different wafer regions.
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 ensures uniform polymer layer thickness across the wafer, preventing excessive side etching and maintaining vertical morphology of capacitor holes, thereby improving the consistency and quality of semiconductor device fabrication.
Implementation Method 1
an etching gas reacts with a to-be-etched material layer to form a polymer layer attached to a sidewall of the capacitor hole
Implementation Method 2
conditioning a temperature in the etching chamber by using a temperature control device while the simulated wafer is etched
Data Source
AI summary
The present application relates to a semiconductor equipment regulation method, including: providing a simulated wafer; placing the simulated wafer in an etching chamber, and conditioning a temperature in the chamber by using a temperature control device while the simulated wafer is etched by using an etching gas; during the etching process, forming a polymer layer on a surface of each etch hole; acquiring a thickness distribution map of the polymer layer in the entire simulated wafer; comparing the acquired thickness distribution map with a target thickness distribution map; and adjusting a temperature control effect through using the temperature control device on each region of the simulated wafer according to a result of the comparison, so as to adjust thickness uniformity of the polymer layer in the entire wafer.