Array Substrate Confining Groove for Signal Line Positioning
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Solution Overview
Problem
Existing display panels face instability in device characteristics due to inaccuracies in the overlapping position of two wire layers, affecting yield and performance.
Innovation Solution
The array substrate incorporates a confining groove in the first insulating layer, with a signal line featuring a first branch in the groove and a second branch outside, accommodated by an accommodating groove in the second insulating layer, allowing for precise positioning and manufacturing simplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional wire overlapping method is used, then manufacturing process is simple, but overlapping position accuracy is poor leading to unstable device characteristics
Solution Approach 1:
The signal line is divided into two separate branches: the first branch is positioned in the confining groove to ensure precise overlapping with the other wire, while the second branch extends outside the groove to connect with additional components. This segmentation allows each branch to fulfill specific positioning requirements independently.
Solution Approach 2:
The confining groove introduces a vertical dimension (depth) to the otherwise planar wire layout. By recessing the groove into the first insulating layer, the patent creates a three-dimensional positioning structure that precisely controls the overlapping position without increasing lateral complexity.
2Manufacturing precision
If confining groove structure is added to improve positioning accuracy, then overlapping position accuracy improves, but manufacturing process complexity increases
Solution Approach 1:
The confining groove is formed in the first insulating layer before the signal line is deposited. This preliminary action establishes the positioning framework in advance, guiding the subsequent wire formation process and ensuring accurate overlapping without requiring complex alignment steps during wire deposition.
Solution Approach 2:
The confining groove acts as an intermediary structure between the first insulating layer and the signal line. It provides a physical template that mediates the positioning relationship, allowing the signal line to be accurately positioned through the groove structure rather than requiring complex direct alignment procedures.
3Reliability
If signal line position is precisely controlled, then device characteristics stability improves, but manufacturing complexity increases
Solution Approach 1:
The first insulating layer exhibits local quality variation: it is recessed to form the confining groove only in the specific region where precise overlapping is required, while remaining flat in other areas. This localized structural modification provides precise positioning control exactly where needed without unnecessarily complicating the entire insulating layer structure.
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 stable device characteristics by precisely controlling the position and dimensions of the signal line, improving manufacturing efficiency and reducing the risk of overlapping inaccuracies.
Implementation Method 1
patterning, by using a wet etching process, the first metal material layer to form a first metal layer including a signal line
Implementation Method 2
at least part of the insulating material being deposited on the second branch to form an accommodating groove
Data Source
AI summary
The present application discloses an array substrate, a display panel, and a method for manufacturing an array substrate. The array substrate includes a substrate; a first insulating layer located on one side of the substrate, a surface of the first insulating layer facing away from the substrate being recessed to form a confining groove; a first metal layer located on a side of the first insulating layer facing away from the substrate, the first metal layer including a signal line, the signal line including a first branch and a second branch surrounding at least part of the first branch, the first branch being located in the confining groove, and at least part of the second branch being located on the surface of the first insulating layer facing away from the substrate; and a second insulating layer located on a side of the first metal layer facing away from the substrate.