Graphene Scratch Prevention Layer for LED Backplane Yield
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Submillimeter light-emitting diode backplanes are prone to scratches during cutting, transferring, and bonding processes, leading to short circuits and open circuits, which significantly affect the product yield.
Innovation Solution
An array substrate with a scratch prevention layer made of graphene or modified graphene, featuring a first and second hollowed region corresponding to conductive pads and electrodes, respectively, is introduced. This layer has a Young's modulus greater than or equal to 0.1 TPa and a thickness ranging from 50 angstroms to 2000 angstroms, providing protection against scratches and facilitating bonding without oxidation of conductive sub-layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the array substrate undergoes cutting, transferring, and bonding processes, then the light-emitting diode backplane can be manufactured, but the substrate is prone to scratches leading to short circuits and open circuits
Solution Approach 1:
A scratch prevention layer is formed on the array substrate before the cutting, transferring, and bonding processes. This preliminary protective layer prevents scratches during subsequent manufacturing operations, thereby improving product yield without compromising manufacturing capability
Solution Approach 2:
The scratch prevention layer acts as an intermediary protective element between the array substrate and the mechanical processes (cutting, transferring, bonding). This intermediate layer absorbs mechanical stresses and prevents direct contact between sharp tools and the substrate, reducing scratches and improving reliability
2Reliability
If a scratch prevention layer is added to protect against scratches, then product yield improves, but the structure becomes more complex
Solution Approach 1:
The scratch prevention layer is implemented as a thin film structure that provides protective functionality without significantly increasing structural complexity. The thin film nature allows it to be integrated into existing manufacturing processes with minimal additional complexity
Solution Approach 2:
The scratch prevention layer uses composite material structures (including graphene-based materials combined with other layers) that provide enhanced scratch resistance while maintaining a relatively simple overall structure that can be manufactured using existing thin-film deposition techniques
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 scratch prevention layer effectively prevents scratches on the array substrate during manufacturing, reducing the occurrence of short circuits and open circuits, thereby improving the overall product yield and display performance.
Implementation Method 1
a preparation material of the scratch prevention layer includes at least one of graphene or modified graphene
Implementation Method 2
the second conductive sub-layer is configured to prevent the first conductive sub-layer from oxidation
Data Source
AI summary
An array substrate, a manufacturing method thereof, and a display device are provided. The array substrate includes a substrate; an array layer, wherein the array layer includes a conductive pad and a conductive electrode disposed on the substrate; and a scratch prevention layer disposed on a side of the array layer away from the substrate, wherein the scratch prevention layer includes a first hollowed region and a second hollowed region, the first hollowed region corresponds to the conductive pad, and the second hollowed region corresponds to the conductive electrode.