Display Substrate Edge ESD Structure for Moisture Protection
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Solution Overview
Problem
Existing electronic devices face challenges in reducing damage to conductive elements, particularly due to electrostatic charge accumulation and moisture exposure during manufacturing and usage.
Innovation Solution
The electronic device incorporates a substrate with a conductive element and an extending element, separated by insulating layers. The extending element has a unique configuration with varying widths and bent regions, which helps in dissipating electrostatic charges and reducing exposure to moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the conductive element is directly exposed on the substrate, then the manufacturing process is simpler, but the conductive element is vulnerable to electrostatic charge accumulation and moisture damage
Solution Approach 1:
An insulating layer is introduced as an intermediary between the conductive element and the external environment. This insulating layer acts as a protective barrier that prevents direct exposure of the conductive element to electrostatic charges and moisture, thereby improving reliability without significantly complicating the manufacturing process
Solution Approach 2:
A thin film insulating layer is applied over the conductive element. This thin film provides protection against electrostatic discharge and moisture ingress while maintaining a compact structure and not significantly increasing device thickness or manufacturing complexity
2Reliability
If the insulating layer is made thicker to better protect the conductive element, then the protection against moisture and electrostatic charges improves, but the overall device thickness increases
Solution Approach 1:
The thickness of the insulating layer is optimized to provide adequate protection against electrostatic discharge and moisture while minimizing the increase in overall device thickness. The insulating layer thickness is selected within a specific range that balances protective functionality with compact device dimensions
3Quantity of substance
If the extending element has a narrow width to reduce material usage, then the amount of material and device area is reduced, but the element becomes more susceptible to damage
Solution Approach 1:
The extending element is constructed using a composite structure that combines different materials or layers, providing enhanced strength and durability even at reduced widths. This allows the element to maintain structural integrity and resistance to damage while minimizing material usage and device area
Data Source
AI summary
The present disclosure provides an electronic device including a conductive element, a first insulating layer, an extending element, and a second insulating layer disposed on a substrate. At least a portion of the first insulating layer is located between the conductive element and the extending element. The second insulating layer is disposed on the conductive element and the extending element. In a cross-sectional view, a thickness of the first insulating layer is different from a thickness of the second insulating layer. In a top view, the extending element has a first portion extending to an edge of the substrate, the extending element has a second portion connecting the first portion and disposed between the first portion and the conductive element, and the first minimum width of the first portion is less than the second minimum width of the second portion.