Segmented Gate Electrode Layout for Lower Gate-Drain Capacitance
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Solution Overview
Problem
The parasitic capacitance of the gate in semiconductor devices affects switching speed and power consumption, necessitating a reduction in gate capacitance to enhance performance.
Innovation Solution
Incorporating openings in the connection area of the gate electrode layer to reduce the area of the connection area, thereby decreasing gate-drain capacitance (Cgd) and improving switching speed and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the connection area of the gate electrode layer is reduced to decrease gate-drain capacitance, then switching speed is improved and power consumption is reduced, but the electrical connection reliability may be compromised
Solution Approach 1:
The connection area is divided into multiple separate contact regions (first contact region and second contact region) instead of a single continuous area. This segmentation reduces the total gate-drain capacitance while maintaining reliable electrical connections through multiple discrete pathways, resolving the contradiction between reducing capacitance for faster switching and maintaining connection reliability.
2Use of energy by moving object
If the connection area of the gate electrode layer is reduced to decrease gate-drain capacitance, then power consumption is reduced, but the electrical connection reliability may be compromised
Solution Approach 1:
The connection area is divided into multiple separate contact regions (first contact region and second contact region) instead of a single continuous area. This segmentation reduces the total gate-drain capacitance and thus power consumption, while maintaining reliable electrical connections through multiple discrete pathways, resolving the contradiction between reducing power consumption and maintaining connection reliability.
3Productivity
If the gate electrode layer area is reduced to decrease parasitic capacitance, then switching performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The gate electrode layer is segmented into distinct regions (cell area, connection area, gate pad area) with the connection area further divided into multiple contact regions. This segmentation allows for more relaxed patterning requirements compared to creating complex continuous patterns, as each region can be formed independently with standard manufacturing processes, thus improving switching performance without excessively increasing manufacturing precision requirements.
Data Source
AI summary
A semiconductor device includes a substrate, a drift region, a channel region, a source region, a gate electrode layer and a gate pad. The drift region is located in the substrate. The gate electrode layer is located above the drift region and is adjacent to the channel region and the source region, in which the gate electrode layer includes a cell area, a connection area and a gate pad area. The cell area at least covers the channel region in the substrate. The connection area is adjacent to the cell area, in which the connection area has at least one opening that penetrates the connection area. The gate pad contacts the gate pad area of the gate electrode layer, in which the gate pad and the at least one opening of the connection area of the gate electrode layer is laterally separated.