3D Micro/Nanostructure Construction via Electron Beam Atom Migration
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Solution Overview
Problem
Current methods for constructing 3D micro/nanostructures lack precise control over material structure and size, especially at the nanoscale, and existing 3D printing technologies are not suitable for high-precision processing of semiconductor micro/nanostructures due to limitations in processing accuracy and material flexibility.
Innovation Solution
A method using an electron beam to focus on a material source, activating surface atoms through thermal radiation and controlling the beam's movement point-by-point to construct 3D micro/nanostructures with high precision, aided by a grating positioning displacement platform and focusing/scanning graphical control program, allowing for real-time construction of complex structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If bottom-top methods (vapor-liquid-solid CVD, self-assembly) are used to prepare nanomaterials, then preparation cost is low and process is fast, but manufacturing precision and structure control are insufficient
Solution Approach 1:
The patent replaces conventional mechanical/chemical deposition methods with electron beam irradiation to achieve atomic-level material manipulation. The electron beam provides precise energy localization to control material deposition and structure formation at the nanoscale, resolving the contradiction between fast preparation and high precision by using a fundamentally different physical mechanism.
Solution Approach 2:
The electron beam irradiation creates localized modification zones with precise spatial control, allowing different regions of the substrate to have different material compositions and structures. This local quality control enables high manufacturing precision while maintaining efficient processing through direct writing approaches.
2Manufacturing precision
If top-bottom methods (photolithography, electron beam lithography) are used for nanostructure machining, then manufacturing precision is high, but device complexity increases and flexibility decreases
Solution Approach 1:
The patent merges material deposition, structure formation, and patterning into a single electron beam irradiation process. This consolidation eliminates the need for separate lithography, deposition, and etching steps required in conventional top-down methods, thereby reducing device complexity while maintaining nanoscale manufacturing precision through direct electron beam control.
Solution Approach 2:
The electron beam irradiation induces self-organized material transformation and structure formation on the substrate. The material system responds autonomously to the localized energy input by forming desired nanostructures through controlled diffusion and phase transformation, reducing the need for complex multi-step processing and enhancing process flexibility.
3Productivity
If conventional 3D printing (SLA, FDM, SLS) is used for 3D structure construction, then real-time construction capability is achieved, but processing accuracy exceeds 100 microns and is unsuitable for micro/nanoscale
Solution Approach 1:
The patent fundamentally changes the energy scale and spatial resolution parameters of 3D printing by using electron beam irradiation instead of conventional laser or mechanical deposition. The electron beam's nanoscale focus capability and high energy density enable real-time construction of 3D micro/nanostructures with precision at the nanometer level, bridging the gap between additive manufacturing speed and nanoscale resolution.
4Manufacturing precision
If 3D laser direct writing based on multiphoton absorption is used, then processing accuracy of 100/200 nm is achieved, but material selection is limited to organic photosensitive monomers
Solution Approach 1:
The electron beam irradiation method provides universal applicability across diverse material systems including metals, semiconductors, ceramics, and polymers. Unlike photopolymerization limited to organic monomers, the electron beam can induce various physical and chemical transformations (diffusion, phase change, decomposition, deposition) applicable to virtually any material, thereby achieving both high precision and broad material versatility.
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
This method extends the processing accuracy of 3D printing to the nanoscale, enabling precise control over material formation and facilitating the integration of nanotechnology and 3D printing, suitable for constructing semiconductor micro/nanostructures with improved flexibility and accuracy.
Implementation Method 1
focusing an electron beam to ensure that a position of a focus of the electron beam is 0-100 nm away from a surface of the material source... the focus of electron beam is used to activate and control the surface layer atoms of the material source via thermal radiation
Data Source
AI summary
A construction method for 3D micro/nanostructure, comprising: Step (1), fixing and vacuuming a material source on a substrate; Step (2), focusing an electron beam to ensure that a position of a focus is 0-100 nm away from a surface of material source, and an interface local domain including the focus of electron beam and surface atoms is formed; and Step (3), controlling the focus of electron beam to move point by point according to a shape of a designed 3D micro/nanostructure, and realizing the construction of 3D micro/nanostructure. This disclosure realizes real-time construction of 3D micro/nanostructure through the migration of atoms driven by uneven atomic density and electric potential difference in interface local domain. This disclosure promotes integrative development of nanotechnology and 3D printing and has good value of application and promotion.