Monolithic Metal-Insulator Transition Structure for Low On-Resistance
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Solution Overview
Problem
Existing power semiconductor devices face challenges in achieving high breakdown voltage and low on-resistance while minimizing heating when switched on, and they require complex manufacturing processes.
Innovation Solution
A monolithic metal-insulator transition device is developed with a switching region and a driving region on a single silicon substrate, utilizing negative differential resistance (NDR) properties, where the driving region supplies critical current for metal-insulator transition switching, and includes specific doping and wiring configurations to enhance electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional power semiconductor devices are used, then breakdown voltage can be achieved, but on-resistance is high and heating occurs when switched on
Solution Approach 1:
The patent utilizes the metal-insulator transition phenomenon by changing the physical state of the resistive switching layer material. When voltage is applied, the material transitions from an insulating state (high resistance) to a metallic state (low resistance), thereby reducing on-resistance and minimizing heating while maintaining high breakdown voltage capability.
Solution Approach 2:
The device employs a composite structure consisting of multiple layers including a resistive switching layer, electrode layers, and insulating layers. This composite material architecture enables simultaneous achievement of high breakdown voltage and low on-resistance by combining materials with complementary properties.
2Reliability
If complex manufacturing processes are used to achieve high performance, then electrical properties improve, but manufacturing complexity increases
Solution Approach 1:
The patent integrates the driving region and switching region into a single monolithic device structure on one substrate. This merging of functions into a unified device reduces manufacturing steps compared to assembling separate components, while maintaining excellent electrical properties through the integrated design.
Solution Approach 2:
The device is divided into distinct functional regions (driving region with first source/drain regions and gate electrode, and switching region with second source/drain regions and resistive switching layer) that can be manufactured using standard semiconductor fabrication processes, enabling modular and scalable production.
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
The device achieves reduced on-resistance and improved breakdown voltage, with enhanced electrical reliability and simplified manufacturing, effectively addressing the limitations of existing power semiconductor devices.
Implementation Method 1
A metal-insulator transition device is a switching device using state transition of a material
Implementation Method 2
The on-resistance of the monolithic metal-insulator transition device may be reduced by using negative differential resistance (NDR) properties
Implementation Method 3
an inlet well region formed adjacent to an upper surface of the substrate in the switching region and doped with an impurity of a first conductivity type, a control well region having a second conductivity type different from the first conductivity type
Data Source
AI summary
Provided is a monolithic metal-insulator transition device. The monolithic metal-insulator transition device includes a substrate including a driving region and a switching region, first and second source/drain regions on the driving region, a gate electrode between the first and second source/drain regions, an inlet well region formed adjacent to an upper surface of the substrate on the switching region, a control well region having a different conductivity type from the inlet well region between the inlet well region and a lower surface of the substrate, a first wiring electrically connecting the first source/drain region and the control well region, and a second wiring electrically connecting the second source/drain region and the inlet well region.