2D Semiconductor Channel With Metallic Nanoparticles for Scaling
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Solution Overview
Problem
Conventional semiconductor devices face performance degradation as they shrink in size due to increased mobility loss and short channel effects, particularly when using silicon-based materials, which limits the reduction in channel thickness.
Innovation Solution
A semiconductor device utilizing a two-dimensional semiconductor material with a polycrystalline structure and metallic nanoparticles deposited on defects and grain boundaries, combined with a gate insulating layer and electrodes, to enhance electrical conductivity and control doping levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the size of semiconductor devices is reduced, then more devices can be integrated and driving speed increases, but performance degradation occurs due to increased mobility loss and short channel effects
Solution Approach 1:
The patent changes the material parameter from conventional silicon-based materials to two-dimensional semiconductor materials with atomic-level thickness (1 nm or less). This fundamental material parameter change enables continued scaling while maintaining performance by eliminating short channel effects and reducing mobility loss, thus resolving the contradiction between device miniaturization and performance maintenance
Solution Approach 2:
The patent employs composite material structures including two-dimensional semiconductor material layers combined with metallic nanoparticles and gate insulating layers. This composite approach enhances electrical conductivity and controls doping levels, allowing high-performance devices at reduced sizes by combining the advantages of different materials to overcome the limitations of individual materials
2Speed
If the channel thickness is reduced to increase driving speed, then device performance improves, but mobility loss increases causing performance degradation
Solution Approach 1:
The patent changes the channel thickness parameter to atomic-level dimensions (1 nm or less) using two-dimensional materials. This extreme thinning reduces the channel length and increases driving speed while the two-dimensional material structure maintains high carrier mobility by eliminating bulk defects and phonon scattering, thus resolving the contradiction between speed enhancement and mobility loss
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 solution enables improved electrical conductivity and reduced contact resistance, maintaining high performance even at small thicknesses, overcoming short channel effects and mobility loss, thus allowing for smaller device sizes without performance degradation.
Implementation Method 1
metallic nanoparticles partially on the two-dimensional material layer... improved electrical conductivity and reduced contact resistance
Data Source
AI summary
A semiconductor device may include a two-dimensional material layer including a two-dimensional semiconductor material having a polycrystalline structure; metallic nanoparticles partially on the two-dimensional material layer; a source electrode and a drain electrode respectively on both sides of the two-dimensional material layer; and a gate insulating layer and a gate electrode on the two-dimensional material layer between the source electrode and the drain electrode.