Display Metal Layer Edge Angles to Prevent ESD and Pixel Defects
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Solution Overview
Problem
Current electronic devices with display panels face challenges in improving display quality and process yield, particularly as resolution increases and pixel area decreases.
Innovation Solution
The electronic device comprises a substrate with a first metal layer having different side angles at its edges, where one edge does not overlap a second metal layer, and the other edge overlaps it, with a side angle of the overlapping edge ranging from 30 to 45 degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution is increased and pixel area is decreased, then the display quality is improved, but the process yield deteriorates
Solution Approach 1:
The patent applies different side angles to different edges of the same metal layer based on local requirements. The first edge has a first side angle optimized for regions not overlapping with other metal layers, while the second edge has a second side angle (30-45 degrees) optimized for regions overlapping with other metal layers to prevent electrostatic discharge. This local differentiation allows the structure to simultaneously achieve high resolution display quality and maintain process yield by addressing different functional requirements in different regions.
2Reliability
If different electrical requirements are met in various regions of the metal layer, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent introduces asymmetry into the metal layer structure by assigning different side angles to different edges. Instead of using a uniform side angle throughout the metal layer, the first edge has a first side angle while the second edge has a second side angle of 30-45 degrees. This asymmetric design enables the structure to meet different electrical requirements in overlapping versus non-overlapping regions without requiring completely separate structures for each region, thus improving reliability while controlling complexity.
Solution Approach 2:
The patent implements local quality by tailoring the side angle of each metal layer edge according to its specific functional requirements. Regions where metal layers overlap require a side angle of 30-45 degrees to prevent electrostatic discharge, while regions without overlap can use a different side angle optimized for other performance criteria. This localized optimization improves electrical performance and reliability without requiring a complete redesign of the entire device structure.
Data Source
AI summary
An electronic device is provided. The electronic device includes a substrate, a first metal layer, and a second metal layer. The first metal layer is disposed on the substrate. The first metal layer includes a first edge and a second edge. The second metal layer is disposed on the first metal layer. The first metal layer is located between the substrate and the second metal layer. The first edge does not overlap the second metal layer. The second edge overlaps the second metal layer. A side angle of the first edge is different from a side angle of the second edge. The side angle of the second edge is greater than or equal to 30 degrees and less than or equal to 45 degrees. A method of manufacturing an electronic device is also provided.