Capillary Self-Assembly Support with Lyophilic Tracks
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Solution Overview
Problem
The capillary self-assembly technique for mesoscopic structures faces challenges in achieving high alignment success rates due to instability in tilt mode, leading to mechanical contact or optical misalignment, with existing solutions failing to address these issues effectively for industrial applications.
Innovation Solution
A support with a reception zone and lyophilic tracks that guide overflow, featuring pairs of tracks with different lyophilic affinities to control tilt and maintain alignment, allowing for controlled overflow and inclination of the plate during capillary self-assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the plate is deposited on the liquid droplet to achieve capillary self-assembly, then alignment precision is improved, but tilt instability occurs causing mechanical contact or optical misalignment
Solution Approach 1:
The patent introduces lyophilic tracks as an intermediary structure between the reception zone and the surrounding area. These tracks mediate the liquid overflow in a controlled manner, preventing uncontrolled spreading that causes tilt instability. The tracks act as a buffer zone that guides liquid flow while maintaining the capillary forces necessary for alignment, thus resolving the contradiction between achieving precise alignment and maintaining tilt stability.
Solution Approach 2:
The patent modifies the surface energy parameters of different zones by creating lyophilic (high surface affinity) tracks with specific surface treatments. By changing the lyophilic/lyophobic characteristics of the support surface in different regions, the liquid overflow is controlled to flow preferentially through the tracks rather than spreading uncontrollably. This parameter change stabilizes the tilt while preserving the alignment precision achieved through capillary self-assembly.
2Manufacturing precision
If liquid overflow is prevented to maintain alignment, then alignment success rate is improved, but controlled tilt management is lost
Solution Approach 1:
The patent segments the support surface into distinct functional zones: a reception zone for initial plate deposition, lyophilic tracks for controlled liquid overflow, and lyophobic zones to contain the liquid. This segmentation allows the system to manage liquid overflow in a controlled manner through the tracks while preventing uncontrolled spreading. The segmented structure enables both high alignment success rates and controlled tilt management, as the tracks provide a designated pathway for liquid flow that does not compromise alignment.
3Reliability
If uniform lyophilic tracks are used to guide overflow, then overflow control is improved, but tilt adjustment capability is reduced
Solution Approach 1:
The patent introduces asymmetry in the lyophilic track design by varying the surface energy characteristics, width, or length of different tracks. This asymmetric configuration allows differential liquid flow control in different directions, enabling tilt adjustment capability. The asymmetric tracks maintain reliable overflow control through their lyophilic properties while providing the versatility to adjust tilt by guiding liquid preferentially in specific directions based on the track asymmetry.
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 effectively stabilizes plate alignment by controlling tilt and preventing overflow, enhancing the success rate of capillary self-assembly in microelectronics and optics by ensuring precise positioning and optical quality.
Implementation Method 1
at least one pair of tracks that extend on the support from the reception zone and that have a lyophilic type affinity with the droplet such that an overflow of the droplet beyond the reception zone is guided in the tracks
Implementation Method 2
it comprises an electro-capillary device associated with each track so that the lyophilic type degree of affinity with the droplet can be modified
Data Source
AI summary
A support is provided, including a reception zone in which the external envelope matches the shape of a plate configured to be placed on a droplet deposited at least in the reception zone in order to achieve capillary self-assembly of the plate and the support, and at least one pair of tracks that extend on the support from the reception zone and that have a lyophilic-type affinity with the droplet such that an overflow of the droplet beyond the reception zone is guided in the tracks, wherein the at least one pair of tracks includes a first track and a second track that do not have the same lyophilic-type degree of affinity with the droplet.