MOSFET Separation Pattern Structure for Short-Channel Leakage
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Solution Overview
Problem
As semiconductor devices are scaled down, short-channel effects such as tunneling currents and leakage currents deteriorate the operating characteristics of MOSFETs.
Innovation Solution
A semiconductor device design featuring a substrate with active patterns, channel patterns, separation patterns, and gate electrodes, where the separation patterns include a body portion and a head portion with an insulating pattern and layer, enhancing electrical insulation and reducing short-channel effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If MOSFET size is scaled down to reduce device dimensions, then device integration density is improved, but short-channel effects such as tunneling currents and leakage currents increase
Solution Approach 1:
The separation pattern divides the semiconductor device structure into distinct regions, creating a physical segmentation between adjacent transistors. This segmentation introduces additional insulation interfaces that suppress carrier leakage and reduce short-channel effects, allowing smaller MOSFET dimensions while maintaining electrical performance
Solution Approach 2:
The separation pattern acts as an intermediary structure between adjacent channel patterns and gate electrodes. This intermediary element provides electrical isolation and prevents direct interaction between neighboring transistors, thereby reducing leakage currents and tunneling effects that worsen with scaling
2Device complexity
If separation pattern structure is simplified to reduce manufacturing complexity, then manufacturing precision is improved, but electrical insulation effectiveness decreases
Solution Approach 1:
The separation pattern employs a composite structure combining multiple insulating materials with different properties. This composite approach achieves superior electrical insulation effectiveness by leveraging the complementary characteristics of each material, while the structured arrangement maintains manufacturing feasibility through standardized layering processes
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
Improves electrical characteristics by reducing leakage currents and increasing the durability of semiconductor devices, while maintaining effective electrical insulation.
Implementation Method 1
the head portion includes an insulating pattern and an insulating layer on the insulating pattern
Data Source
AI summary
A semiconductor device includes a substrate, an active pattern on the substrate, a first channel pattern and a second channel pattern on the active pattern, a separation pattern between the first channel pattern and the second channel pattern, a gate electrode on the first channel pattern and the second channel pattern, and a gate insulating layer between the first channel pattern and the gate electrode and between the second channel pattern and the gate electrode, wherein the separation pattern includes a body portion and a head portion on the body portion, and the head portion includes an insulating pattern and an insulating layer on the insulating pattern.