Support Substrate with Curved Cantilever Array for Nanostructure Transfer
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Solution Overview
Problem
The challenge in the fabrication of devices with nanostructures is the inefficient transfer and attachment of nanostructures from a growth substrate to a target device, leading to low yield due to random or parallel deposition methods, which often result in incorrect positioning or excess nanostructures.
Innovation Solution
A support substrate with a set of cantilevers arranged along a curved or angular part of the circumference, allowing each cantilever to extend in different directions, facilitating sequential transfer of nanostructures by loading and unloading them onto a device substrate using van der Waals or other adherent forces, with optional growth on the cantilever tips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If random or parallel deposition methods are used to transfer nanostructures onto device substrates, then the transfer process is simple, but the yield of devices is low due to incorrect positioning or excess nanostructures
Solution Approach 1:
The invention divides the transfer process into sequential steps using individual cantilevers, where each cantilever picks up and places a single nanostructure one at a time. This segmentation of the parallel deposition process into discrete sequential operations enables precise positioning while maintaining manufacturing feasibility through automated manipulation of the cantilever array.
Solution Approach 2:
The cantilevers serve as intermediary tools between the nanostructure source and the device substrate. Each cantilever acts as a mediator that picks up a nanostructure at its free end, transports it to the target location, and releases it precisely on the device substrate, thereby enabling controlled transfer rather than random deposition.
2Productivity
If multiple cantilevers are arranged in parallel to transfer multiple nanostructures, then the transfer capacity increases, but collisions between cantilevers occur preventing scalable production
Solution Approach 1:
The invention resolves cantilever collision issues by arranging cantilevers in a two-dimensional array with controlled spacing and orientations, rather than simple parallel alignment. This dimensional arrangement allows multiple cantilevers to operate simultaneously without interference, enabling scalable production while maintaining transfer capacity.
Solution Approach 2:
The cantilevers are designed with flexible positioning capabilities, allowing dynamic adjustment of their positions and orientations during the transfer process. This dynamic control enables the system to adapt cantilever configurations to avoid collisions while maintaining high transfer capacity across multiple devices.
3Productivity
If a large number of devices are produced using random deposition, then production volume increases, but waste of devices increases due to discarded non-functional devices
Solution Approach 1:
The invention performs preliminary positioning of each nanostructure on its target device before final attachment, using the cantilever as a temporary holder. This preliminary action ensures correct placement is achieved before release, eliminating the need to discard mispositioned devices and reducing waste while maintaining high production volume.
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 approach enables scalable and cost-effective production by preventing collisions between cantilevers, allowing for precise placement of nanostructures on device substrates, thereby increasing production efficiency and reducing waste.
Implementation Method 1
loading and unloading them onto a device substrate using van der Waals or other adherent forces
Implementation Method 2
loading and unloading them onto a device substrate using van der Waals or other adherent forces
Data Source
Figure 1a~1d
Figure 2a~2c
Figure 3a~3b
AI summary
The invention refers to a support substrate (1) comprising a set of cantilevers (13), wherein each cantilever of the set of cantilevers (13) extends along a longitudinal axis in a direction from the support substrate (1) to a free end (130) of the cantilever. The free end (130) of each cantilever of the set of cantilevers (13) is adapted to load the nanostructure (2). The cantilevers of the set of cantilevers (13) are arranged along at least a curved or angular part of a circumference (11) of the support substrate (1). At least two cantilevers of the set of cantilevers (13) each extend in different directions.