IGBT Pulse Circuit for Precise Surface Processing Control
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Solution Overview
Problem
Current pulsed high power electrical applications require highly specialized, inflexible, and expensive equipment, limiting customizability, precision, and affordability, and are not easily adaptable for various surface processing methods.
Innovation Solution
The use of Insulated-Gate Bipolar Transistor (IGBT) technology to create high-power pulses with customizable voltage, current, and timing structures, enabling a versatile and cost-effective high-power pulse system that can replicate complex pulse structures with high precision and flexibility, suitable for diverse applications like HIPIMS, plasma generation, and electrochemistry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If highly specialized equipment is used for pulsed high power electrical applications, then reliability and precision are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent implements a universal pulser design that can perform multiple surface processing functions (sputtering, ion implantation, electropolishing, etc.) through software control and parameter adjustment rather than requiring separate specialized equipment for each application. This multi-functional approach maintains reliability across applications while reducing overall system complexity and cost.
Solution Approach 2:
The system achieves different processing modes by changing electrical parameters (voltage, current, pulse width, duty cycle) of a single pulser rather than requiring different equipment. The ability to dynamically adjust these parameters allows the same hardware to reliably perform diverse functions without increasing device complexity.
2Manufacturing precision
If highly specialized equipment is used for pulsed high power electrical applications, then manufacturing precision is improved, but cost increases significantly
Solution Approach 1:
The patent uses software-based pulse generation that can replicate complex pulse structures and timing patterns without requiring expensive specialized hardware for each pattern. The digital control system can copy and reproduce precise pulse waveforms through programming, achieving manufacturing precision at lower cost.
Solution Approach 2:
The system replaces complex mechanical or specialized electrical hardware with software-based control and standard semiconductor components (IGBTs). This substitution maintains pulse structure precision while dramatically reducing manufacturing cost and improving ease of manufacture.
3Reliability
If specialized equipment is used for each surface processing method, then application-specific performance is improved, but adaptability decreases
Solution Approach 1:
The patent creates a universal pulser platform that can adapt to different surface processing applications through software configuration and parameter adjustment. The same hardware system reliably performs sputtering, ion implantation, electropolishing, and other processes by changing control parameters, thereby maximizing adaptability while maintaining application-specific performance.
Solution Approach 2:
The system employs dynamic parameter adjustment capabilities where voltage, current, pulse width, and duty cycle can be changed in real-time to suit different applications. This dynamic flexibility allows the system to adapt to various processing requirements without sacrificing reliability in any specific application.
4Adaptability or versatility
If advanced semiconductor technologies are used, then customizability and precision are improved, but device complexity increases
Solution Approach 1:
The patent introduces software and control electronics as intermediaries between the user and the semiconductor power devices (IGBTs). This intermediary layer provides an easy-to-use interface for customizing pulse parameters while managing the complexity of the underlying semiconductor technology, allowing high customizability without exposing users to device complexity.
Data Source
AI summary
A high-power pulsed surface processing system includes insulated-gate bipolar transistors (IGBT) to replicate desirable pulse structures with high precision, at low cost, and with high reliability within a single system. The pulsed surface processing system includes a power supply, an anode and a cathode, a dual gate driver supplying power to one or more IGBT gates, and one or more capacitor banks. Pulse formation software controls the timing and duration of electrical pulses to the electrodes. A freewheeling diode protects the system from an abrupt reduction of current in the circuit. The high-power pulsed surface processing system may be used to control versatile and complex pulse structures while with precise control of instantaneous pulse powers, pulse timing, and process control. The inclusion of dual gate drivers also offers the ability for multiple pulsers to be created and “slaved” together for a wide variety of custom processes.