Laser-Heated Plasma Chamber for Faster Ion Source Stabilization
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Solution Overview
Problem
Ion implantation processes are hindered by the slow temperature responsiveness and significant heat loss of arc chambers in ion generation devices, leading to prolonged waiting times and reduced productivity due to the need for stabilizing plasma generation at suitable temperatures.
Innovation Solution
Incorporating a heating device that uses a laser beam to heat the plasma generation chamber, either by irradiating the chamber's defining members or members exposed to the plasma, to enhance temperature control and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If arc discharge is used to generate plasma, then ions can be extracted for implantation, but the arc chamber temperature becomes difficult to control quickly due to poor temperature responsiveness and significant heat loss
Solution Approach 1:
The laser heating device performs preliminary heating of the arc chamber to a target temperature before plasma generation begins. This preliminary action reduces the time required for temperature stabilization during operation, as the chamber is already pre-heated to the desired temperature range, thereby improving productivity without sacrificing plasma stability
Solution Approach 2:
A laser heating device is introduced as an intermediary tool to transfer thermal energy to the arc chamber. The laser acts as a mediator between the energy source and the plasma generation system, enabling rapid and precise temperature control that overcomes the inherent slow thermal response of the arc chamber, thus reducing waiting time while maintaining stable plasma conditions
2Reliability
If the arc chamber is heated to suitable temperature for plasma generation, then stable plasma can be maintained, but significant heat loss occurs and temperature control becomes slow
Solution Approach 1:
The patent replaces conventional thermal heating mechanisms with laser-based optical heating. The laser beam provides direct, focused energy transfer to the arc chamber walls, enabling rapid temperature adjustment without the thermal inertia and heat loss problems of conventional heating systems. This substitution allows precise temperature control while maintaining plasma generation stability
Solution Approach 2:
The laser heating system enables dynamic adjustment of the arc chamber temperature parameter in real-time. By controlling laser power and exposure duration, the system can quickly raise or maintain the chamber temperature at optimal levels for plasma stability, overcoming the slow thermal response characteristic of conventional heating methods while ensuring reliable plasma generation
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 shortens the time required for plasma stabilization and improves the overall productivity of the ion implantation process by promoting faster temperature raising and reducing the waiting period for optimal operation conditions.
Implementation Method 1
a heating device configured to heat the plasma generation chamber by irradiating a member that defines the plasma generation chamber or a member that is to be exposed to the plasma generated inside the plasma generation chamber with a laser beam
Data Source
AI summary
There is provided an ion generation device including a plasma generation chamber that generates a plasma for extracting an ion, and a heating device configured to heat the plasma generation chamber by irradiating a member that defines the plasma generation chamber or a member that is to be exposed to the plasma generated inside the plasma generation chamber with a laser beam.