Gate Sidewall Protective Layer for Low-Capacitance Semiconductor Devices
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Solution Overview
Problem
The semiconductor industry faces challenges in manufacturing complex and smaller ICs due to increased complexity and costs associated with scaling down processes, requiring advancements in IC manufacturing techniques to maintain efficiency and reduce costs.
Innovation Solution
The semiconductor device incorporates a dielectric structure with a leakage-improving component, such as an air gap, to reduce capacitance and improve RC delay issues, while using a method that includes forming a substrate with fins, gate structures, and conductive layers, and patterning conductive materials to create a semiconductor device with a leakage-improving component between conductive layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If geometry size is decreased to increase functional density, then production efficiency is improved and costs are lowered, but manufacturing complexity increases
Solution Approach 1:
The patent introduces a mid-layer dielectric structure that segments the interconnect architecture into distinct layers, allowing independent optimization of each layer. This segmentation enables complex routing to be divided into manageable segments, reducing overall manufacturing complexity while maintaining high functional density
Solution Approach 2:
The patent adds a vertical dimension by introducing a mid-layer dielectric structure between conventional interconnect layers. This dimensional approach allows signals to be routed through multiple levels, reducing lateral congestion and enabling higher functional density without proportionally increasing lateral manufacturing complexity
2Productivity
If geometry size is decreased to increase functional density, then more circuits fit per chip area, but RC delay issues worsen
Solution Approach 1:
The patent introduces a mid-layer dielectric structure that adds vertical routing dimensions, allowing signals to travel through multiple layers rather than long lateral paths. This reduces the effective resistance and capacitance by shortening current paths and providing alternative routing options, thereby reducing RC delay while increasing functional density
Solution Approach 2:
The mid-layer dielectric structure acts as an intermediary between conventional interconnect layers, providing intermediate connection points and routing options. This intermediary structure reduces the direct distance between source and destination, lowering both resistance and capacitance effects that cause RC delay
3Loss of time
If more dielectric layers are added to reduce capacitance, then RC delay is improved, but device complexity increases
Solution Approach 1:
The patent segments the dielectric structure into conventional layers and a specific mid-layer dielectric structure with distinct properties. This segmentation allows the mid-layer to be optimized specifically for reducing capacitance and RC delay, while other layers maintain their conventional designs, thereby limiting overall structural complexity increase
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 enhances production efficiency, reduces costs, and improves the semiconductor device's performance by minimizing capacitance and RC delay issues through the strategic use of dielectric structures and air gaps, facilitating the manufacturing of complex and smaller ICs.
Implementation Method 1
The semiconductor device incorporates a dielectric structure with a leakage-improving component, such as an air gap, to reduce capacitance and improve RC delay issues
Data Source
AI summary
A semiconductor device and method of manufacturing the same are provided. The semiconductor device includes a substrate and a first gate electrode disposed on the substrate and located in a first region of the semiconductor device. The semiconductor device also includes a first sidewall structure covering the first gate electrode. The semiconductor device further includes a protective layer disposed between the first gate electrode and the first sidewall structure. In addition, the semiconductor device includes a second gate electrode disposed on the substrate and located in a second region of the semiconductor device. The semiconductor device also includes a second sidewall structure covering a lateral surface of the second gate electrode.