Multicomponent Nanopatterns via Ion Etching for Uniform Arrays
Solution Overview
Problem
Existing methods struggle to produce multicomponent nanopatterns with high resolution and high aspect ratio while achieving homogeneous mixing of materials with various compositions, limiting their application in advanced materials and electronic devices.
Innovation Solution
A method involving depositing a multicomponent material film on a prepatterned substrate and re-depositing it through an ion etching process using a secondary sputtering phenomenon to form a multicomponent nanopattern with a high aspect ratio and uniform array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bottom-up methods are used to produce multicomponent particles, then various combinations of metals can be formed, but it is difficult to produce multicomponent particles with the same shape at the same composition ratio because the conditions for reducing respective metals are different
Solution Approach 1:
The patent applies preliminary action by forming a prepattern structure before deposition. A resist pattern is created on the substrate, and then a first film is deposited only on the raised portions of this prepattern. This preliminary structuring ensures that subsequent multicomponent materials are deposited in controlled locations and thicknesses, enabling precise composition ratios while maintaining the ability to form various metal combinations.
2Shape
If top-down methods are used to produce nanopatterns, then a desired shape of array can be obtained, but there is a difficulty in uniform mixing since a polymetallic material is formed by deposition
Solution Approach 1:
The patent applies segmentation by dividing the deposition process into multiple sequential steps. Instead of depositing all metal layers at once, the method deposits different metal films in separate steps on the prepattern structure. This segmentation allows each metal layer to be precisely controlled and deposited uniformly, while the prepattern structure ensures proper spatial arrangement and mixing during subsequent processing steps.
3Manufacturing precision
If dip-pen lithography is used to form polymetallic nanopatterns, then spherical particles with uniform array can be produced, but the method has a disadvantage of not being homogeneously mixed depending on material
Solution Approach 1:
The patent uses an intermediary approach by introducing a prepattern structure as a mediator between the deposition process and the final nanopattern formation. The prepattern (formed by resist coating and selective etching) serves as an intermediary template that guides the sequential deposition of different metal films. This intermediary structure ensures both uniform array formation and homogeneous mixing by controlling the deposition geometry and sequence.
4Measurement precision
If conventional ion etching is used to form nanopatterns, then high resolution can be achieved, but the method does not enable re-deposition on side surfaces to form high aspect ratio structures
Solution Approach 1:
The patent applies continuity of useful action by implementing a sequential process where ion etching is followed by re-deposition. After the first ion etching step creates the basic pattern, the process continues with re-deposition of the multicomponent material on the side surfaces. This continuous action allows the pattern to be refined and three-dimensional structures with high aspect ratios to be formed, maintaining high resolution throughout the process.
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 method enables the formation of multicomponent nanopatterns with improved catalytic properties and uniformity, allowing for various combinations and arrays over a wide area, enhancing their applicability in devices like field effect transistors and gas sensors.
Implementation Method 1
re-depositing it through an ion etching process using a secondary sputtering phenomenon
Data Source
AI summary
Disclosed is a method of producing a multicomponent nanopattern having a regular array and allowing a variety of combinations of compositions by depositing a film including a multicomponent material on a substrate having a prepattern formed thereon and then conducting ion-etching thereon twice. The method can be utilized in a variety of applications requiring considerably regularly arranged multicomponent nanostructures such as transistors, organic optoelectronic devices, catalysts and gas sensors.