Decoupling Capacitor Bottom Electrode Structure for Semiconductor Noise Reduction
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Solution Overview
Problem
Highly integrated semiconductor devices face challenges in achieving high operating speed and low noise due to fluctuations in power and ground voltages, which existing technologies struggle to address effectively through decoupling capacitors.
Innovation Solution
The semiconductor device incorporates a decoupling capacitor design with specific electrode structures and dielectric patterns to increase decoupling capacitance, including a substrate with cell array and peripheral circuit regions, where the decoupling region and connection line region both feature bottom electrodes and dielectric layers to form capacitors that filter noise between operating powers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of operating circuits is increased to achieve high integration, then the capacity of the semiconductor device is improved, but fluctuation noises occur in power voltage and ground voltage
Solution Approach 1:
The semiconductor device is divided into multiple unit cells, each containing its own decoupling capacitor. This segmentation allows each unit cell to independently filter voltage noise, preventing the accumulation of noise across the entire high-capacity device while maintaining high integration through the modular structure.
Solution Approach 2:
Decoupling capacitors are introduced as intermediary elements between the power voltage line and ground voltage line in each unit cell. These capacitors act as mediators that absorb and filter voltage fluctuations, preventing noise from affecting the operating circuits while allowing the high integration design to proceed.
2Device complexity
If conventional decoupling capacitor designs are used, then the structure is simple, but the decoupling capacitance is insufficient to effectively filter noise
Solution Approach 1:
The decoupling capacitor structure merges multiple functional elements: the first and second bottom electrodes form capacitor plates, while the first and second dielectric layers combined with the third dielectric layer create a multi-layer dielectric structure. This merging of elements increases the decoupling capacitance within a compact area, effectively filtering noise without requiring a complex external capacitor structure.
Solution Approach 2:
The patent transitions from a planar capacitor design to a three-dimensional multi-layer structure by stacking dielectric layers and electrodes vertically. The first dielectric layer, second dielectric layer, and third dielectric layer are arranged in multiple layers with corresponding bottom electrodes and top electrodes, increasing capacitance by utilizing the vertical dimension rather than expanding horizontally.
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 design enhances electrical characteristics by increasing decoupling capacitance, effectively reducing noise between operating powers and improving the overall performance of semiconductor devices.
Implementation Method 1
semiconductor devices commonly use a decoupling capacitor to filter noise between operating voltages such as the power voltage (VDD) and the ground voltage (VSS)
Data Source
AI summary
A semiconductor device comprises a substrate including a cell array region and a peripheral circuit region that surrounds the cell array region. The cell array region includes landing pads disposed on the substrate and first bottom electrodes disposed on and connected to corresponding landing pads. The peripheral circuit region includes conductive lines disposed on the substrate, a first conductive pad disposed on and spaced apart from the conductive lines, a dielectric pattern disposed between the conductive lines and the first conductive pad, and a plurality of second bottom electrodes disposed on and connected in common to the first conductive pad. A height of each of the first bottom electrodes is greater than a height of each of the second bottom electrodes. Top surfaces of the first bottom electrodes are located at a same level as a level of top surfaces of the second bottom electrodes.