Embedded Metal Mesh Flexible Transparent Electrode Manufacturing
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Solution Overview
Problem
Current methods for manufacturing large-area embedded metal mesh flexible transparent electrodes are costly, inefficient, and limited by high sheet resistance and poor optical performance, with challenges in embedding high-aspect-ratio structures and using high-temperature sintered materials due to substrate temperature constraints.
Innovation Solution
Combining electric-field-driven jet deposition micro-nano 3D printing with roll-to-plane thermal imprinting to create embedded metal mesh flexible transparent electrodes, allowing for low-cost, high-throughput production with high-temperature metal mesh materials and achieving low sheet resistance and high light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal mesh is formed on the surface of the transparent substrate, then the manufacturing process is simple, but the surface smoothness is poor and short circuiting defects are prone to occur
Solution Approach 1:
The metal mesh is embedded within grooves formed in the transparent substrate, creating a nested structure where the conductive layer is housed inside the substrate itself. This resolves the contradiction by maintaining manufacturing simplicity while achieving smooth surfaces, as the metal mesh is concealed within the substrate's groove structures rather than sitting on the surface.
Solution Approach 2:
The invention transitions from a two-dimensional surface-mounted metal mesh to a three-dimensional embedded structure by creating grooves within the substrate. This dimensional change allows the metal mesh to be positioned within the substrate volume, achieving both ease of manufacture and improved surface smoothness by relocating the conductive element from the surface to an embedded position.
2Ease of manufacture
If metal mesh is formed on the surface of the transparent substrate, then the manufacturing process is simple, but the metal mesh has poor adhesiveness and is prone to falling off
Solution Approach 1:
By nesting the metal mesh within grooves of the transparent substrate, the invention creates mechanical interlocking that significantly enhances adhesion. The metal mesh is physically trapped within the substrate structure, preventing delamination and falling off during bending operations, while maintaining the simplicity of the manufacturing process.
Solution Approach 2:
The groove structures in the substrate provide curved surfaces that conform to the metal mesh, creating mechanical interlocking through the curved geometry. This curvature-based design enhances the bonding between the metal mesh and substrate, improving adhesion strength while keeping the manufacturing process straightforward.
3Reliability
If the line width is decreased to sub-microscale to reduce sheet resistance, then the electrical performance improves, but the metal mesh structure with high aspect ratio is difficult to manufacture
Solution Approach 1:
The embedded groove structure provides mechanical support and confinement for sub-microscale metal mesh lines, enabling the fabrication of high aspect ratio patterns that would otherwise be difficult to manufacture. The groove walls act as physical guides and support structures, facilitating the creation of narrow, high-aspect-ratio conductive features.
Solution Approach 2:
By changing the physical state and positioning of the metal mesh from surface-mounted to embedded within grooves, the invention enables the fabrication of sub-microscale features with high aspect ratios. The embedded configuration alters the mechanical and electrical parameters, allowing for narrower line widths and improved sheet resistance while maintaining manufacturability.
4Reliability
If metal mesh is embedded into the flexible transparent substrate, then the surface smoothness and adhesiveness are improved, but the manufacturing cost is high and production throughput is low
Solution Approach 1:
The manufacturing process is segmented into distinct stages: groove formation in the substrate, metal mesh deposition within the grooves, and embedding. This segmentation allows each step to be optimized independently and enables parallel processing, thereby reducing overall manufacturing cost and increasing production throughput while maintaining the benefits of embedded metal mesh.
Solution Approach 2:
The grooves are pre-formed in the transparent substrate before metal mesh deposition. This preliminary action simplifies subsequent manufacturing steps and enables high-throughput production by preparing the substrate structure in advance, reducing the complexity and cost of the overall embedding process.
5Temperature
If low-temperature sintering is used to embed conductive materials, then the substrate temperature constraint is satisfied, but the sheet resistance is high and electrical performance is poor
Solution Approach 1:
The invention changes the sintering parameters by using high-temperature resistant transparent substrates that can withstand higher sintering temperatures. This parameter change enables the use of high-temperature sintering processes that reduce sheet resistance and improve electrical performance, while still satisfying substrate temperature constraints through material selection.
Solution Approach 2:
The invention uses composite material systems consisting of high-temperature resistant transparent substrates combined with metal mesh conductive materials. This composite approach allows the substrate to withstand high sintering temperatures required for low sheet resistance, while maintaining the optical and mechanical properties needed for flexible transparent electrodes.
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 efficient, low-cost mass production of large-size embedded metal mesh electrodes with improved electrical and optical performance, including low sheet resistance and high light transmittance, while expanding material options and simplifying the manufacturing process.
Implementation Method 1
electric-field-driven jet deposition micro-nano 3D printing
Implementation Method 2
thermal imprinting
Data Source
AI summary
A manufacturing method of an embedded metal mesh flexible transparent electrode and application thereof; the method includes: directly printing a metal mesh transparent electrode on a rigid substrate by using an electric-field-driven jet deposition micro-nano 3D printing technology; performing conductive treatment on a printed metal mesh structure through a sintering process to realize conductivity of the metal mesh; respectively heating a flexible transparent substrate and the rigid substrate to set temperatures; completely embedding the metal mesh structure on the rigid substrate into the flexible transparent substrate through a thermal imprinting process; and separating the metal mesh completely embedded into the flexible transparent substrate from the rigid substrate to obtain the embedded metal mesh flexible transparent electrode. The mass production of the large-size embedded metal mesh flexible transparent electrode with low cost and high throughput by combining the electric-field-driven jet deposition micro-nano 3D printing technology with the roll-to-plane thermal imprinting technology.