Semiconductor Gate Dipole Structure for Threshold Voltage Tuning
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Solution Overview
Problem
The integration of semiconductor devices leads to a reduction in electrical properties and production yield, necessitating improvements in reliability and electrical performance.
Innovation Solution
Incorporation of a dipole structure comprising a first and second dipole layer with different maximum oxidation numbers between metal patterns and dielectric layers to adjust threshold voltage and enhance electrical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If integration of semiconductor devices is increased, then device density is improved, but electrical properties and production yield deteriorate
Solution Approach 1:
The patent introduces a dipole structure with specific dipole moments between the metal pattern and high-k dielectric layer, changing the electrical parameters (threshold voltage, work function) of the device. This allows optimization of electrical properties while maintaining high integration density by controlling the dipole characteristics rather than changing the physical layout.
Solution Approach 2:
The dipole structure acts as an intermediary layer between the metal pattern and high-k dielectric layer. This intermediary element modifies the electrical field distribution and work function, enabling improved electrical properties without requiring changes to the overall device structure or integration density.
2Quantity of substance
If integration of semiconductor devices is increased, then device density is improved, but production yield deteriorates
Solution Approach 1:
By adjusting the dipole structure parameters (dipole moment, layer thickness, material composition), the patent optimizes device performance to meet specification requirements. This ensures higher production yield while maintaining high device density through parameter optimization rather than structural redesign.
3Reliability
If threshold voltage is adjusted using dipole structure, then electrical properties are improved, but device complexity increases
Solution Approach 1:
The dipole structure serves as a simple intermediary layer inserted between existing metal pattern and high-k dielectric layer. This approach adjusts threshold voltage without requiring complex additional structures, maintaining device simplicity while improving electrical properties.
Solution Approach 2:
The dipole structure utilizes composite material design combining different materials with specific dipole moments. This allows threshold voltage adjustment through material selection rather than structural complexity, maintaining ease of fabrication while achieving desired electrical characteristics.
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 dipole structure improves the reliability and electrical properties of semiconductor devices by adjusting threshold voltage and reducing device size, thereby enhancing production yield.
Implementation Method 1
a dipole structure between the metal pattern and the high-k dielectric layer. The dipole structure may include a first dipole layer and a second dipole layer. The first dipole layer may include a first dipole element. The second dipole layer may include a second dipole element different from the first dipole element.
Data Source
AI summary
Disclosed is a semiconductor device comprising a first channel region, a first dielectric structure on the first channel region, a first metal pattern spaced apart from the first dielectric structure, and a first dipole structure between the first metal pattern and the first dielectric structure. The first dipole structure includes a first dipole layer and a second dipole layer. The first dipole layer includes a first dipole element. The second dipole layer includes a second dipole element different from the first dipole element. A maximum oxidation number of the first dipole element is different from a maximum oxidation number of the second dipole element.