ZrON MIS Device Stabilization via TiN Electrode Heating
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Solution Overview
Problem
Conventional MIS-type semiconductor devices experience unstable operation due to variations in threshold voltage and maximum capacitance with changes in applied voltage frequency and range, leading to inconsistent power consumption and manufacturing challenges.
Innovation Solution
A manufacturing method for MIS-type semiconductor devices involving the formation of a zirconium oxynitride layer, a titanium nitride electrode layer, and subsequent heating at specific temperatures to stabilize threshold voltage and maximum capacitance, using a substrate with silicon or gallium nitride, which improves insulation and operational stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional MIS-type semiconductor devices are used with high-k insulating film (zirconium oxynitride), then the device can operate at high speed and low power consumption, but the threshold voltage varies with changes in applied voltage frequency and range, causing unstable operation
Solution Approach 1:
The patent applies parameter changes by heating the titanium nitride electrode layer at specific temperatures (400-1000°C) to modify its physical and chemical properties. This thermal treatment changes the electrode layer's characteristics to stabilize the threshold voltage, reducing variation by 50% or more across different voltage frequencies and ranges while maintaining high-speed operation capability
2Ease of manufacture
If conventional MIS-type semiconductor devices are used, then manufacturing can be performed using existing processes, but there are demands for easiness of manufacturing and resource saving
Solution Approach 1:
The patent merges multiple functions into the heating step: it simultaneously serves as both the electrode formation process and the stabilization treatment. By combining these steps, the manufacturing process becomes simpler and more efficient, reducing the number of separate processing steps required while achieving both ease of manufacture and resource savings
3Reliability
If the electrode layer is heated at high temperature, then the variation in threshold voltage is suppressed, but the manufacturing process becomes more complex
Solution Approach 1:
The heating step is designed to serve multiple purposes simultaneously: it acts as both the electrode layer formation process and the stabilization treatment. This multi-functional approach eliminates the need for separate stabilization steps, maintaining threshold voltage stability while avoiding additional process complexity
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 method effectively suppresses variations in threshold voltage and maximum capacitance, enhancing the operational stability of MIS-type semiconductor devices across different voltage ranges and frequencies, and simplifies the manufacturing process.
Implementation Method 1
heating the electrode layer
Data Source
AI summary
A manufacturing method of MIS (Metal Insulator Semiconductor)-type semiconductor device includes the steps of: forming a zirconium oxynitride (ZrON) layer; forming an electrode layer containing titanium nitride (TiN) on the zirconium oxynitride (ZrON) layer; and heating the electrode layer.