Ion Implanter Controller for Implantation Profile Accuracy
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Solution Overview
Problem
Ion implanters face challenges in accurately tuning ion beams to achieve desired implantation profiles for semiconductor production, leading to inconsistencies in the quality of n-type and p-type extrinsic materials.
Innovation Solution
A substrate-processing apparatus equipped with an ion implanter and a controller that monitors initial implantation profiles and automatically adjusts parameters to match a desired profile using a processor, mass analyzer, and beam manipulators, with the ability to generate and store model scripts for precise ion beam tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual tuning of ion beam parameters is performed, then the ion implanter can be operated, but the implantation profile accuracy is insufficient and inconsistent
Solution Approach 1:
The system automatically measures the actual implantation profile using detectors and compares it with the desired profile, then self-adjusts the beam parameters without requiring manual intervention. The controller autonomously tunes the ion beam parameters based on the measured deviations, enabling the system to self-correct and achieve accurate implantation profiles consistently.
Solution Approach 2:
The system implements a closed-loop feedback mechanism where detectors continuously measure the implantation profile, the controller compares the measured profile with the desired profile, and automatically adjusts the beam parameters based on the deviation. This feedback loop ensures that any deviations from the desired profile are detected and corrected in real-time, maintaining high manufacturing precision.
2Manufacturing precision
If automatic tuning is implemented to improve implantation profile accuracy, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The system replaces manual mechanical adjustment of beam parameters with an automated electronic control system. The controller uses electronic signals to adjust the beam parameters based on detector measurements, substituting the mechanical manual tuning process with an electronic automated system. This reduces the need for complex mechanical adjustment mechanisms while achieving higher precision.
Solution Approach 2:
The controller acts as an intermediary between the detectors and the ion beam generation system. It receives measurement data from the detectors, processes the information to determine the required adjustments, and sends control signals to the beam parameters. This intermediary layer simplifies the overall system architecture by centralizing the control logic and coordination functions.
3Manufacturing precision
If multiple detectors and control mechanisms are added to achieve desired implantation profile, then manufacturing precision improves, but device complexity and cost increase
Solution Approach 1:
The detectors serve multiple functions: they measure the implantation profile, provide feedback to the controller, and enable automatic adjustment of beam parameters. The same detection system is used for both monitoring and control purposes, reducing the need for separate components. The controller also performs multiple functions including data acquisition, analysis, and parameter adjustment coordination.
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 solution enhances the accuracy of ion implantation processes, ensuring consistent production of n-type and p-type extrinsic materials by automatically tuning the ion beam to match the desired implantation profile, thereby improving the quality and reliability of semiconductor manufacturing.
Implementation Method 1
an ion source energized by the processor and functioning to ionize a gas
Implementation Method 2
a mass analyzer providing a magnetic field to select ions of desired species for implantation
Implementation Method 3
a beam manipulator accepting the ion beam leaving the mass analyzer and used to manipulate a shape of the ion beam by a magnetic field
Implementation Method 4
a multipole unit and upper/lower rods to direct desired ions to the substrate using electricity
Data Source
AI summary
The present disclosure provides a substrate-processing apparatus. The substrate-processing apparatus includes an ion implanter and a controller associated with the ion implanter. The ion implanter is configured to implant ions into a substrate using an ion beam. The controller is configured to monitor an initial implantation profile of the ion beam and tune the ion implanter to provide the ion beam having a desired implantation profile based on the initial implantation profile and the desired implantation profile.