Perovskite Capacitor Electrode Stabilization
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Solution Overview
Problem
As semiconductor devices miniaturize, the capacitance of capacitors decreases and leakage current increases, posing challenges in maintaining effective dielectric characteristics and stability of perovskite crystal structures in capacitors.
Innovation Solution
A capacitor design featuring a dielectric layer with a perovskite crystal structure, sandwiched between electrodes with metallic, semiconductor, and ionic layers, where the metallic layer has a thickness of 50 Å or less, and the semiconductor layer is five times thicker, stabilizing the dielectric layer's crystallinity and enhancing capacitance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the size of the capacitor is reduced for miniaturization, then the degree of integration improves, but the capacitance decreases and leakage current increases
Solution Approach 1:
The patent changes the material composition parameters of the electrode, introducing a multi-layer structure with metallic layer (50 Å or less), semiconductor layer (five times or more thicker than metallic layer), and ionic layer. This parameter change in material composition enables maintaining high capacitance characteristics even in miniaturized capacitors.
Solution Approach 2:
The patent employs composite materials by combining metallic layer, semiconductor layer, and ionic layer in a multi-layer electrode structure. This composite approach allows the electrode to simultaneously provide conductivity, charge storage, and interface stability, resolving the contradiction between miniaturization and capacitance maintenance.
2Length of stationary object
If the size of the capacitor is reduced, then the device dimensions decrease, but the leakage current increases
Solution Approach 1:
The patent changes the electrode material parameters by introducing a multi-layer structure with specific thickness ratios (semiconductor layer five times or more thicker than metallic layer). This parameter optimization reduces leakage current while maintaining small capacitor size.
Solution Approach 2:
The semiconductor layer acts as an intermediary between the metallic layer and the dielectric layer, providing a transition zone that reduces leakage current. The ionic layer further mediates the interface between electrode and dielectric, stabilizing the structure and minimizing harmful leakage effects in miniaturized capacitors.
3Device complexity
If a simple electrode structure is used, then the device complexity is reduced, but the perovskite crystal structure stability deteriorates
Solution Approach 1:
The patent uses composite materials with a multi-layer electrode structure (metallic layer, semiconductor layer, ionic layer) that provides the necessary stability for perovskite crystal structure. The specific thickness ratios and material combinations create a stable interface that maintains crystallinity without excessive complexity.
Solution Approach 2:
The patent applies local quality by assigning different functions to different layers: the metallic layer provides conductivity, the semiconductor layer provides charge storage and interface stability, and the ionic layer provides chemical stability. This localized functional distribution stabilizes the perovskite structure while keeping the overall design manageable.
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 design stabilizes the perovskite crystal structure, improves capacitance, and reduces leakage current, resulting in a capacitor with enhanced dielectric constant and capacitance characteristics.
Implementation Method 1
a dielectric layer having a perovskite crystal structure between the first and second electrodes, wherein at least one of the first and second electrodes includes a metallic layer having a perovskite crystal structure
Data Source
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AI summary
Provided are a capacitor and a semiconductor device including the same. The capacitor includes: a dielectric layer having a perovskite crystal structure; and first and second electrodes spaced apart from each other with the dielectric layer therebetween. At least one of the first and second electrodes includes a metallic layer having a perovskite crystal structure, a first ionic layer having ionic properties, and a semiconductor layer.