High-Resolution Conductive Features via Adhesive Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional printing methods struggle to produce high-resolution conductive features with widths less than 10 microns, as they either result in low resolution or are costly, making them unsuitable for low-cost electronic fabrication.
Innovation Solution
A method involving the deposition of a liquid composition containing metal nanoparticles and solvents onto a substrate, followed by heating to form an intermediate feature with a central and edge region, and then applying an adhesive to remove the central region, resulting in high-resolution conductive features with widths less than 10 microns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional printing methods (inkjet, screen printing) are used to deposit metal nanoparticle inks, then the fabrication process is simple and low-cost, but the resolution is insufficient (line width >= 30 microns)
Solution Approach 1:
The patent segments the fabrication process into distinct stages: (1) deposition of metal nanoparticle ink forming an intermediate feature with central and edge regions, (2) selective removal of the central region through adhesive application, and (3) formation of the final high-resolution feature. This segmentation allows each stage to be optimized independently, achieving sub-10 micron resolution through the combination of simple deposition followed by controlled material removal.
Solution Approach 2:
The patent employs preliminary action by first depositing the metal nanoparticle ink to form an intermediate feature that is larger than the final desired structure. The central region is then selectively removed to create the high-resolution feature. This preliminary deposition of a larger feature followed by selective removal is a classic example of preliminary action, enabling high resolution without requiring complex deposition equipment.
2Manufacturing precision
If photolithography is used to produce high-resolution lines (1-5 microns), then manufacturing precision is high, but the cost is too high for low-cost electronic fabrication
Solution Approach 1:
The patent replaces the complex optical-mechanical photolithography system with a simpler liquid deposition system. Instead of using light exposure and photoresist, the method uses direct deposition of metal nanoparticle ink followed by thermal processing and selective adhesive removal. This substitution maintains high resolution (sub-10 micron) while dramatically reducing equipment complexity and fabrication cost, making it suitable for low-cost electronic devices.
Solution Approach 2:
The patent changes the fundamental parameters of the fabrication process by using metal nanoparticle inks with specific size distributions (D10-D90 ratio) and controlling deposition parameters to achieve high resolution. The nanoparticle size and distribution are carefully controlled to enable formation of sub-10 micron features through liquid deposition rather than requiring photolithography's optical parameters.
3Manufacturing precision
If special inkjet printers are designed to print very small droplets, then resolution may improve, but the nozzle clogs making reliable printing difficult
Solution Approach 1:
The patent uses preliminary action by depositing the metal nanoparticle ink as a liquid composition that forms an intermediate feature larger than the final structure. This preliminary deposition does not require printing the final sub-10 micron feature directly, so nozzle clogging is not an issue. The high resolution is achieved in a subsequent step through selective removal of the central region, making the process reliable and consistent.
Solution Approach 2:
The patent segments the feature formation process into deposition of an intermediate feature followed by selective removal. This segmentation allows the deposition step to use standard inkjet printing without requiring ultra-fine droplet control, while the high resolution is achieved through the removal step. This resolves the contradiction by separating the deposition function from the resolution-function.
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 enables the production of high-resolution conductive features with widths as low as 4-5 microns, suitable for electronic devices, while being cost-effective and suitable for low-cost fabrication on plastic substrates.
Implementation Method 1
heating the deposited features to a heating temperature during or after the depositing to form an intermediate feature
Implementation Method 2
applying an adhesive substance to at least a portion of a surface of the intermediate feature
Data Source
AI summary
A method of forming a high resolution feature on a substrate, the method includes, depositing a liquid composition comprising a substance and a solvent onto the substrate to form deposited features, heating the deposited features to a heating temperature during or after the depositing to form an intermediate feature having a central region and an edge region, applying an adhesive substance to at least a portion of a surface of the intermediate feature, and removing the adhesive substance together with at least a portion of the central region of the intermediate feature to form the high resolution feature on the substrate.