Roughness Surface Isolating Structure for Semiconductor Gate Oxide Integrity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The scaling down of semiconductor integrated circuits leads to increased complexity in manufacturing, with metal contaminations and dangling bonds in silicon-on-oxide substrates causing degradation in gate oxide integrity and performance of semiconductor devices.
Innovation Solution
Incorporating an isolating structure with a roughness surface adjacent to the semiconductor device, which traps metal contaminations and dangling bonds, enhancing gate oxide integrity by gettering these impurities and preventing current leakage and voltage swell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If scaling down process is used to increase functional density, then production efficiency and cost are improved, but manufacturing complexity and metal contamination increase
Solution Approach 1:
The patent introduces an isolating structure as an intermediary element between the semiconductor device and the substrate. This isolating structure includes a first roughness surface that acts as a mediator to trap and remove metal contaminants, thereby resolving the contradiction by enabling continued scaling while managing the increased contamination risk through an intermediate protective layer
2Productivity
If scaling down process is used to increase functional density, then production efficiency and cost are improved, but metal contamination and dangling bonds cause degradation in gate oxide integrity
Solution Approach 1:
The patent extracts harmful metal contaminants and dangling bonds from the vicinity of the semiconductor device by providing an isolating structure with a roughness surface that selectively traps these impurities. This extraction mechanism allows scaling down to improve productivity while maintaining gate oxide integrity by removing the harmful elements that would otherwise cause degradation
3Reliability
If isolating structure with roughness surface is added, then gate oxide integrity and device reliability are improved, but device complexity increases
Solution Approach 1:
The patent applies the roughness surface feature locally to the isolating structure rather than throughout the entire device. This localized application of the roughness characteristic provides the necessary impurity trapping capability to improve gate oxide integrity while minimizing the overall structural complexity by concentrating the special feature only where it is most needed
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 isolating structure with a roughness surface effectively traps impurities, improving gate oxide integrity and preventing performance degradation, thus enhancing the reliability of semiconductor devices without additional costs.
Implementation Method 1
the roughness surface includes carbon atoms thereon... traps metal contaminations and dangling bonds... gettering these impurities
Data Source
AI summary
A semiconductor structure includes a substrate, a semiconductor device in the substrate, and an isolating structure in the substrate and adjacent to the semiconductor device. The isolating structure has a roughness surface at a sidewall of the isolating structure, and the roughness surface includes carbon atoms thereon.