SiGe Gate Structure for Reliable High-Density Semiconductor Memory
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Solution Overview
Problem
Highly integrated semiconductor devices face challenges in maintaining reliability and electrical characteristics due to increased complexity, which affects their operating speed and power consumption.
Innovation Solution
A semiconductor device design incorporating a silicon-germanium (SiGe) pattern between a semiconductor substrate and gate structure, with dopant regions and contacts, enhances hole mobility and reduces contact resistance, improving electrical characteristics and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a semiconductor device is highly integrated to achieve miniaturization and multi-functionalization, then productivity and device capability are improved, but reliability and electrical characteristics deteriorate
Solution Approach 1:
The patent applies local quality by forming a semiconductor pattern with different material composition (second semiconductor material) than the substrate (first semiconductor material) in specific regions where electrical characteristics need improvement. This localized material differentiation enhances hole mobility and electrical performance in critical areas without changing the entire device structure, thereby improving reliability while maintaining high integration.
Solution Approach 2:
The patent utilizes composite materials by combining two different semiconductor materials - a first semiconductor material for the substrate and a second semiconductor material for the pattern formed thereon. This composite structure leverages the advantageous properties of each material to achieve both high integration and improved electrical characteristics, resolving the contradiction between productivity and reliability.
2Volume of moving object
If a semiconductor device is highly integrated to achieve miniaturization, then device density is improved, but electrical characteristics deteriorate
Solution Approach 1:
The patent implements local quality by creating a semiconductor pattern with distinct material properties in specific locations on the substrate. The second semiconductor material is strategically placed to improve hole mobility and electrical characteristics in regions where miniaturization has caused performance degradation, enabling small device size to coexist with good electrical properties.
Solution Approach 2:
The patent applies parameter changes by modifying the material composition parameter - using a second semiconductor material with different properties than the first substrate material. This parameter change in material composition directly improves hole mobility and electrical characteristics, allowing the device to maintain performance despite reduced size from high integration.
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 use of a SiGe pattern increases hole mobility by 20-25% compared to traditional silicon substrates, improving current flow and threshold voltage control, thus enhancing the semiconductor device's reliability and electrical performance.
Implementation Method 1
The use of a SiGe pattern increases hole mobility by 20-25% compared to traditional silicon substrates, improving current flow and threshold voltage control
Data Source
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AI summary
A semiconductor device includes a semiconductor substrate including a first semiconductor material, a gate structure on the semiconductor substrate, and a semiconductor pattern including a second semiconductor material, between the semiconductor substrate and the gate structure. The semiconductor pattern is in contact with the semiconductor substrate, the gate structure passes through a portion of the semiconductor pattern, and is spaced apart from the semiconductor substrate, and the first semiconductor material is different from the second semiconductor material.