Array Substrate Insulating Layer Aperture for Friction Alignment
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Solution Overview
Problem
The friction alignment process in TFT-LCD manufacturing is affected by static electricity differences, leading to poor alignment of liquid crystal molecules due to contact between conductive and insulating materials during high-speed friction.
Innovation Solution
An array substrate with a non-display region featuring an insulating layer and conductive structures within apertures, where the conductive structures are positioned below the surface of the insulating layer, preventing direct contact with the rubbing cloth and minimizing static electricity influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive structures are exposed on the surface during friction alignment, then electrical connection is achieved, but static electricity difference causes poor alignment quality
Solution Approach 1:
An insulating layer is introduced as an intermediary between the conductive structure and the rubbing cloth. The rubbing cloth first contacts the insulating layer (which can be uniformly charged), and only indirectly contacts the conductive structure through the insulating layer. This mediator eliminates the direct contact between the rubbing cloth and conductive structure, thereby resolving the static electricity difference problem while maintaining electrical connection functionality.
Solution Approach 2:
The conductive structure is moved from the surface dimension to a subsurface dimension by embedding it within the insulating layer. The aperture provides a pathway for electrical connection while the insulating layer maintains a continuous surface for uniform friction alignment. This dimensional transition allows both electrical connectivity and uniform alignment quality to coexist.
2Reliability
If conductive structures are covered by insulating layer, then friction alignment quality improves, but electrical connection path is blocked
Solution Approach 1:
The insulating layer is designed with apertures that provide pathways for electrical connection. These apertures allow the conductive structure to remain electrically connected to external circuits while being embedded within the insulating layer. The porous structure of the insulating layer with apertures enables simultaneous achievement of uniform friction alignment surface and electrical connectivity.
3Ease of manufacture
If rubbing cloth contacts conductive material directly, then manufacturing process is simple, but static electricity causes non-uniform alignment
Solution Approach 1:
The insulating layer serves as a mediator between the rubbing cloth and conductive structure. The rubbing cloth uniformly contacts the insulating layer surface during friction alignment, and the insulating layer uniformly transmits the friction force to the alignment film. This intermediary approach maintains manufacturing simplicity while achieving uniform alignment precision.
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 configuration ensures consistent and high-quality frictional alignment, improving the picture quality by eliminating static electricity-induced issues during the alignment process.
Implementation Method 1
the friction alignment process in the related art has a problem of poor frictional alignment due to static electricity difference
Data Source
AI summary
An array substrate, a method for manufacturing the same and a display device are provided. The array substrate includes an insulating layer and a conductive structure in the non-display region. The insulating layer includes at least one aperture in the non-display region. The aperture has a one-to-one correspondence with the conductive structure. The conductive structure is within the aperture, and the surface of the conductive structure is lower than the surface of the insulating layer.