Ballistic Transport Device Vacuum Channel Electron Control
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Solution Overview
Problem
Conventional electronic devices with ballistic transport suffer from limitations such as scattering events, short mean free paths, and inability to control ballistic current flow effectively, particularly in high-frequency and power applications.
Innovation Solution
A three-terminal transistor-like device with a particle propagation channel, a first particle deflector, and a particle source and sink, configured to facilitate ballistic transport and control electron flow through geometric shaping and deflection electrodes, allowing for long mean free paths and high mobility electrons.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conventional electron transport in solid media is used, then electrical conduction occurs through scattering events, but the mean free path remains short (30-60 nm in gold) and electron mobility is limited
Solution Approach 1:
The patent changes the physical parameters of the medium by using a vacuum or gas-filled channel instead of a solid medium, fundamentally altering the electron transport mechanism from scattering-dominated to ballistic transport, thereby achieving mean free paths extending over micrometers
Solution Approach 2:
The patent replaces the solid-medium-based electrical conduction system with a vacuum/gas-based electron beam system, substituting the Drude model scattering mechanism with Newtonian ballistic motion governed by electric fields and geometric boundaries
2Length of stationary object
If the number of scattering events is reduced by lowering working temperature or reducing impurities, then mean free path increases, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent extracts the electron transport path from the solid medium and places it in a vacuum or gas-filled channel, removing the scattering sources (impurities, lattice vibrations) inherent in solid media while maintaining a simple geometric channel structure that is easier to manufacture
Solution Approach 2:
The device is segmented into distinct functional regions: electron source, vacuum channel with geometric boundaries, and collection region, allowing independent optimization of each section and simplifying the overall manufacturing process
3Length of stationary object
If ballistic transport is achieved in solid media, then long mean free paths are obtained, but control of electron flow becomes difficult due to lack of scattering mechanisms
Solution Approach 1:
The patent introduces geometric boundaries (channel walls, apertures, deflectors) as intermediaries that mediate electron flow control through elastic collisions, providing a new mechanism for controlling ballistic electrons without relying on scattering from impurities or phonons
Solution Approach 2:
The patent employs curved or angled channel geometries to guide and control electron trajectories through geometric focusing and deflection, enabling precise control of electron flow paths while maintaining ballistic transport conditions
4Device complexity
If conventional two-terminal devices are used, then simple structure is maintained, but ability to control ballistic current flow is insufficient for high-frequency and power applications
Solution Approach 1:
The patent designs a multi-terminal device structure where the same geometric channel and electron beam mechanism can serve multiple functions: current control, signal modulation, high-frequency operation, and power handling, making the device adaptable to diverse applications without requiring fundamentally different designs
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
Enables flexible application in low-power, high-frequency circuits with improved electron mobility and longer mean free paths, facilitating efficient ballistic transport and control of electron flow, enhancing device performance in power and high-frequency applications.
Implementation Method 1
the particle propagation channel being configured to facilitate ballistic transport of particles from the particle inflow portion to the particle outflow portion
Implementation Method 2
a first particle deflector arranged at the particle flow deflection portion, the first particle deflector being activatable to deflect (attract and/or repulse) particles propagating in the particle flow deflection portion
Data Source
AI summary
A device includes a particle propagation channel, a particle deflector, a particle source, and a particle sink. The particle deflector facilitates ballistic transport of particles from a particle inflow portion through a particle flow deflection portion to a particle outflow portion. The particle deflector is arranged at the particle flow deflection portion and is activatable to deflect particles in the flow deflection portion and is configured to selectively prevent the particles from reaching the particle outflow portion. The particle source and particle sink are configured to cause a current path of the particles through the device.