Fan-Out Line Adhesion via Notch-Groove Interlocking
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Solution Overview
Problem
Existing array substrates with double-layer fan-out wiring are prone to fan-out line failure or breakage during processing due to rinsing and air knife influences, affecting product yield.
Innovation Solution
The array substrate design features two fan-out layers with an insulating layer in between, where the first fan-out line has a protruding part that fits into a groove in the insulating layer, and the second fan-out line has a notch that receives a recessed portion of the insulating layer, enhancing adhesion and reducing the likelihood of line failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If double-layer wiring is used to arrange fan-out lines, then the area occupied by the fan-out area is reduced, but the fan-out lines are prone to fall off or break during processing
Solution Approach 1:
The patent transitions from single-layer to double-layer wiring arrangement in the fan-out area, utilizing the thickness direction (z-axis) to stack fan-out lines across multiple layers. This dimensional change allows compact area utilization while providing structural support through vertical stacking, resolving the contradiction between area reduction and line stability.
Solution Approach 2:
The patent implements an insulating layer nested between the first and second fan-out layers, creating a layered sandwich structure. The insulating layer is positioned within the fan-out area structure, providing electrical isolation and mechanical support to the fan-out lines, thereby preventing line breakage while maintaining compact area usage.
2Productivity
If double-layer wiring is used to arrange fan-out lines, then the area occupied by the fan-out area is reduced, but the fan-out lines are prone to fall off or break during processing
Solution Approach 1:
The insulating layer is nested within the fan-out structure between the two fan-out layers, providing continuous support and isolation. This nested configuration prevents fan-out lines from falling off or breaking during processing steps like cleaning, exposure, and etching, thereby improving both reliability and product yield simultaneously.
Solution Approach 2:
The insulating layer acts as an intermediary element between the first and second fan-out layers, providing mechanical support and electrical isolation. This intermediary structure prevents direct contact between adjacent fan-out lines, reducing the risk of short circuits and line breakage, thus improving product yield without compromising line stability.
3Area of stationary object
If fan-out lines are arranged in a compact configuration, then the bezel area is reduced, but the lines are more susceptible to damage from rinsing and air knife
Solution Approach 1:
The patent arranges fan-out lines in a compact double-layer configuration along the thickness direction, reducing the horizontal footprint in the bezel area. This vertical stacking protects the lines from horizontal forces during rinsing and air knife processes, as the lines are supported by the insulating layer and positioned in a compact vertical arrangement rather than spread out horizontally.
Solution Approach 2:
The compact double-layer configuration, while potentially vulnerable, is combined with the insulating layer that converts the close proximity of lines into a benefit by providing mutual support and isolation. The insulating layer prevents damage from rinsing and air knife by maintaining structural integrity of the compact arrangement, turning the potential harm of compactness into a space-saving advantage.
Data Source
AI summary
An array substrate, a display, and a manufacturing method are provided. The array substrate is provided with a first notch on at least one of two sides in a width direction of the second fan-out line, wherein a portion of the insulating layer fills into the first notch in a direction towards the second fan-out line to form a recess part corresponding to the first notch, the recess part defining a groove. A protruding part is provided on at least one of two sides in a width direction of the first fan-out line, where a part of the protruding part fills into the groove in a direction towards the insulation layer to form a protrusion corresponding to the groove.