Conductive Polymer Contact Electrodes for Micro-LED Alignment
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Solution Overview
Problem
Current display device manufacturing processes are complex and inefficient, particularly in aligning and fixing light emitting elements, which affects the alignment quality and increases the number of fabrication steps.
Innovation Solution
A display device design that includes contact electrodes made of conductive polymer, where light emitting elements are aligned and fixed using an electric field and a conductive polymer ink, reducing the number of fabrication processes and improving alignment quality by using the polymer to form contact electrodes that cover the light emitting elements and electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing processes are used to align and fix light emitting elements, then the alignment quality can be maintained, but the number of fabrication steps increases and the process becomes complex
Solution Approach 1:
The patent combines multiple functions (alignment, fixation, and contact electrode formation) into a single conductive polymer layer. The conductive polymer is applied as an ink that simultaneously serves as an adhesive to fix the light emitting elements, forms electrical contacts, and provides structural support, thereby eliminating multiple separate fabrication steps while maintaining alignment precision.
Solution Approach 2:
The conductive polymer layer performs multiple functions simultaneously: it acts as an adhesive for fixing light emitting elements, forms electrical contact electrodes, provides mechanical support, and enables electrical connectivity. This multi-functional approach reduces the overall device complexity and streamlines the manufacturing process.
2Manufacturing precision
If multiple separate processes are used for aligning and fixing light emitting elements, then the alignment quality can be improved, but the manufacturing time increases
Solution Approach 1:
The patent merges the alignment and fixation processes into a single step where the conductive polymer ink is applied. The ink contains particles that align with the light emitting elements and simultaneously provide fixation, eliminating the need for separate alignment and bonding steps, thereby reducing manufacturing time while maintaining alignment quality.
Solution Approach 2:
The conductive polymer ink is formulated with particles that are pre-aligned or capable of self-alignment before application. This preliminary preparation ensures that when the ink is applied, the particles are already positioned to align with the light emitting elements, eliminating the need for time-consuming post-application alignment steps.
3Reliability
If conventional contact electrodes are used, then electrical connectivity can be ensured, but the manufacturing process becomes more complex
Solution Approach 1:
The conductive polymer layer serves as both the fixation adhesive and the contact electrode, eliminating the need for separate electrode deposition steps. This multi-functional approach ensures electrical connectivity while simplifying the fabrication process by reducing the number of layers and steps required.
Solution Approach 2:
The conductive polymer is formulated as a composite material containing conductive particles or fillers within a polymer matrix. This composite structure provides both the adhesive properties needed for fixation and the electrical conductivity required for contact electrodes, combining multiple functions in a single material system.
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 simplifies the manufacturing process, enhances the alignment of light emitting elements, and reduces the complexity of fabrication steps while maintaining high alignment quality and electrical connectivity.
Implementation Method 1
The first contact electrode and the second contact electrode may include conductive polymer
Implementation Method 2
light emitting elements are aligned and fixed using an electric field and a conductive polymer ink
Data Source
AI summary
Provided are a display device and a manufacturing method therefor. The display device includes: a first substrate; a first electrode and a second electrode spaced apart from each other on the first substrate; a plurality of light emitting elements at least a portion of which is arranged between the first electrode and the second electrode; a first contact electrode at least partially covering the first electrode and contacting one end of each of the light emitting elements; and a second contact electrode spaced apart from the first contact electrode to at least partially cover the second electrode and contacting the other end of each of the light emitting elements, wherein the first contact electrode and the second contact electrode comprise a conductive polymer.