Array Substrate Protective Layer Layout for Laser Damage Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the field of display technology, particularly with mini-LEDs and Micro LEDs, issues such as bulging, discoloration, and peeling of the light adjustment layer occur due to excessive absorption of laser energy during the manufacturing process, which affects the reliability and yield of array substrates and display devices.
Innovation Solution
The implementation of a protective layer between the light adjustment layer and the base substrate, which attenuates laser energy, preventing overlap with the conductive layer and positioning itself between signal lines to mitigate energy absorption and related manufacturing issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If laser energy is used to prepare signal lines, then manufacturing efficiency is improved, but the light adjustment layer absorbs excessive laser energy causing bulging, discoloration, and peeling
Solution Approach 1:
A protective layer is introduced as an intermediary between the base substrate and the light adjustment layer. This protective layer absorbs excessive laser energy during signal line preparation, preventing the light adjustment layer from absorbing too much energy and avoiding defects such as bulging, discoloration, and peeling.
Solution Approach 2:
The protective layer is formed in advance before the light adjustment layer is completely finalized. By positioning the protective layer beforehand, it can preemptively shield the light adjustment layer from laser damage during subsequent signal line preparation processes.
2Stability of the object's composition
If the protective layer is made of conductive material and connected with constant electrical signal, then electrical stability is improved, but device complexity increases
Solution Approach 1:
The protective layer is designed to serve multiple functions simultaneously: it protects the light adjustment layer from laser damage, provides electrical stability when made of conductive material, and can be integrated with existing conductive layer structures. This multi-functionality reduces the need for additional separate components.
3Object-affected harmful factors
If the orthographic projection of the light adjustment layer does not overlap with the conductive layer, then laser energy absorption is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The protective layer serves as a mediator that allows the light adjustment layer to be positioned in gaps between signal lines without direct overlap with conductive layers. This intermediary structure enables the non-overlapping configuration while managing the precision requirements through the protective layer's positioning.
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 solution enhances the reliability of array substrates and improves product yield by reducing the adverse effects of laser energy on the light adjustment layer, thereby preventing bulging, discoloration, and peeling, while also alleviating color shift issues.
Implementation Method 1
The energy of the laser is weakened when the laser adopted for preparing the signal lines is propagated to the protective layer
Data Source
AI summary
An array substrate includes a base substrate, a conductive layer on a side of the base substrate, a light adjustment layer on a side of the conductive layer away from the base substrate, a plurality of signal lines on a side of the base substrate away from the conductive layer, and a protective layer between the light adjustment layer and the base substrate. The conductive layer includes a plurality of pads electrically connected with electronic elements. An orthographic projection of at least part of the light adjustment layer on the base substrate does not overlap an orthographic projection of the conductive layer on the base substrate, and is located in gaps between orthographic projections of adjacent signal lines on the base substrate. An orthographic projection of the protective layer on the base substrate at least covers the orthographic projection of the at least part on the base substrate.