Chamber Performance Matching for Semiconductor Equipment
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Solution Overview
Problem
In semiconductor manufacturing, there is a need for improved methodologies to correct and match the baseline of processing chambers to minimize process variable mismatch, ensuring predictable product reliability, consistency, and yield, as overlay errors between layers can lead to device failure and increased cycle times due to tool-to-tool manufacturing errors and film property mismatches.
Innovation Solution
A method involving sensor calibration in processing chambers, where a predetermined process is performed, and signals from sensors are collected and analyzed to identify mismatches, allowing for calibration and subsequent processes to ensure chamber performance matches a standard, using hardware and on-wafer result matching procedures to correct sensor responses and chamber settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single processing chamber is dedicated to manufacture certain film layers to eliminate tool-to-tool manufacturing errors, then overlay precision is improved, but manufacturing cycle time increases and logistics become more complex
Solution Approach 1:
The patent applies parameter changes by systematically adjusting and calibrating processing parameters across multiple chambers to achieve consistent film properties. Through baseline matching and sensor calibration, each chamber's parameters are modified to match a reference chamber, enabling multi-chamber processing without sacrificing overlay precision.
Solution Approach 2:
The patent implements universality by developing a standardized baseline matching methodology that can be applied across multiple processing chambers and different film layer types. This universal approach allows any chamber to process any layer with consistent quality, eliminating the need for dedicated single-chamber assignments.
2Productivity
If multiple processing chambers are used to increase productivity, then manufacturing cycle time decreases, but tool-to-tool manufacturing errors and film property mismatches increase
Solution Approach 1:
The patent applies preliminary action by performing baseline matching and sensor calibration before actual production processing. This preparatory calibration ensures that all chambers are pre-adjusted to match the reference baseline, preventing film property mismatches before they occur during multi-chamber production.
Solution Approach 2:
The patent implements feedback through sensor calibration processes that compare actual sensor readings against expected values. This feedback mechanism identifies and corrects deviations in chamber performance, ensuring consistent film properties across multiple chambers while maintaining high productivity.
3Measurement precision
If sensor calibration is performed to match chamber baselines, then measurement precision is improved, but process time and complexity increase
Solution Approach 1:
The patent applies partial action by focusing calibration efforts on critical sensors and key process parameters rather than attempting to calibrate every sensor in every chamber. This selective approach achieves sufficient measurement precision for overlay control while minimizing the time and complexity overhead of comprehensive calibration.
Data Source
AI summary
Embodiments of the present disclosure provide methodology to match and calibrate processing chamber performance in a processing chamber. In one embodiment, a method for calibrating a processing chamber for semiconductor manufacturing process includes performing a first predetermined process in a processing chamber, collecting a first set of signals transmitted from a first group of sensors disposed in the processing chamber to a controller while performing the predetermined process, analyzing the collected first set of signals, comparing the collected first set of signals with database stored in the controller to check sensor responses from the first group of sensors, calibrating sensors based on the collected first set of signals when a mismatch sensor response is found, subsequently performing a first series of processes in the processing chamber, and collecting a second set of signals transmitted from the sensors to the controller while performing the series of processes.