Segmented Gate Electrode Composition for Interface Noise Control
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Solution Overview
Problem
Current semiconductor devices experience noise and undesirable current flow issues at the interface between the active region and the isolation structure due to the conductive nature of the active region and non-conductive isolation structure, leading to random telegraph signals and flicker noise.
Innovation Solution
A gate electrode with multiple portions is fabricated, where one portion is over the interface between the active region and the isolation structure and another over the active region, with different material compositions to control electromagnetic fields and inhibit current flow near the interface, thereby mitigating noise and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform gate electrode is used over the active region and isolation structure interface, then the device structure is simple, but noise and undesirable current flow occur at the interface
Solution Approach 1:
The gate electrode is divided into multiple portions with different material compositions: a first portion over the active region and a second portion over the isolation structure interface. This segmentation allows each portion to be optimized for its specific location, reducing noise at the interface while maintaining device performance in the active region.
Solution Approach 2:
Different material compositions are used in different portions of the gate electrode. The first portion has a material composition optimized for the active region, while the second portion has a different material composition specifically tailored to reduce noise and control current flow at the isolation structure interface.
2Productivity
If the gate electrode material is optimized for the active region, then current flow control in the channel is improved, but noise increases at the interface with the isolation structure
Solution Approach 1:
The gate electrode is segmented into portions with different material compositions, allowing the first portion to optimize current flow control in the active region while the second portion specifically addresses noise reduction at the isolation structure interface.
Solution Approach 2:
The gate electrode employs local quality by using different material compositions in different portions: the first portion's material is optimized for current flow control in the active region, while the second portion's material is specifically selected to minimize noise generation at the isolation structure interface.
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 different material compositions of the gate electrode portions effectively reduce current flow noise and improve the semiconductor arrangement's performance by controlling electromagnetic fields and current density near the interface.
Implementation Method 1
A material composition of the gate electrode affects an electromagnetic field that is generated in and around the active region when a voltage is applied to the gate electrode
Data Source
AI summary
A semiconductor arrangement is provided and includes a gate electrode. The gate electrode includes a first portion over a first interface between an active region and an isolation structure and a second portion over the active region. The first portion has a first material composition. The second portion has a second material composition different than the first material composition.