Semiconductor Devices With Localized Interface Films
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Solution Overview
Problem
Current semiconductor devices face challenges in optimizing transistor performance due to limitations in interface films and channel cross-sectional areas, which affect charge transfer and leakage current characteristics, particularly as device density increases.
Innovation Solution
The semiconductor device incorporates interface films and channels with varying thicknesses and cross-sectional areas in different regions, using oxide films and metal films with distinct oxygen contents to enhance performance by optimizing charge transfer and minimizing leakage current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interface films with different thicknesses are used in different regions, then charge transfer characteristics are improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by forming first interface films with a first thickness in a first region and second interface films with a second thickness in a second region. This allows each region to have optimized interface film thickness tailored to its specific electrical characteristics, improving charge transfer performance while managing complexity through regional differentiation.
2Object-generated harmful factors
If channels with different cross-sectional areas are used in different regions, then leakage current is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements local quality by creating first channels with a first cross-sectional area in a first region and second channels with a second cross-sectional area in a second region. This regional variation in channel dimensions allows optimization of leakage current characteristics while establishing clear manufacturing specifications for each region.
Solution Approach 2:
The patent applies segmentation by dividing the semiconductor device into distinct first and second regions with different channel cross-sectional areas. This segmentation allows independent optimization of each region's electrical characteristics, particularly for controlling leakage current in different operational contexts.
3Reliability
If metal films with different oxygen content are used, then electrical performance is optimized, but process complexity increases
Solution Approach 1:
The patent applies local quality by forming first metal films with a first oxygen content in a first region and second metal films with a second oxygen content in a second region. This allows optimization of electrical performance in each region by controlling the oxygen content of metal films locally, while managing process complexity through targeted compositional control.
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
This approach improves semiconductor device performance by tailoring interface film thickness and channel dimensions to specific regions, achieving better charge transfer characteristics and reduced leakage currents, thereby enhancing overall device efficiency.
Implementation Method 1
The first and second interface films may include an oxide of the substrate
Data Source
AI summary
Semiconductor devices and methods for fabricating the same are provided. A semiconductor device may include a substrate including first and second regions, a first interface film disposed on the substrate in the first region, a second interface film disposed on the substrate in the second region, a dielectric film disposed on the first and second interface films, a first metal film disposed on the dielectric film in the first region, and a second metal film disposed on the dielectric film in the second region. The first and second interface films may comprise an oxide of the substrate, the first and second metal films may comprise different materials, and the first and second interface films may have different thicknesses. Channels may be provided in the first and second regions, and the channels may be fin-shaped or wire-shaped. The metal films may have different oxygen content.