Display Electrode Connection Layout With Variable Insulating Layer
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Solution Overview
Problem
Connection failures between light emitting elements and connection electrodes in display devices are prevalent, leading to performance issues.
Innovation Solution
A display device design featuring a first and second electrode with light emitting elements connected via a first and second connection electrode, where an insulating layer with varying thickness portions is used to ensure stable electrical contact, and a method of fabricating this structure through multiple etching processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform thickness insulating layer is used, then the manufacturing process is simple, but connection failures occur between light emitting elements and connection electrodes
Solution Approach 1:
The insulating layer is designed with different thicknesses in different regions: a first thickness in the first region and a second thickness (greater than the first) in the second region. This local variation in thickness provides enhanced insulation where needed while maintaining connection reliability, directly resolving the contradiction between connection reliability and structural complexity.
2Reliability
If the insulating layer thickness is increased, then insulation performance improves, but manufacturing precision requirements increase
Solution Approach 1:
The insulating layer is segmented into multiple regions with different thicknesses: a first region with a first thickness and a second region with a second thickness. This segmentation allows each region to be optimized independently for its specific function, improving overall insulation performance while making thickness control more manageable through region-specific manufacturing parameters.
3Area of stationary object
If the insulating layer width is increased, then coverage area increases, but the space for connection electrodes decreases
Solution Approach 1:
The insulating layer width is varied locally across different regions: wider in regions requiring enhanced insulation coverage and narrower in regions where connection electrodes need to be positioned. This local variation in width allows the insulating layer to provide adequate coverage area while maintaining sufficient space for reliable electrical contacts.
Data Source
AI summary
A display device and method for fabrication thereof are provided. The display device includes a first electrode and a second electrode spaced apart from the first electrode in a second direction, light emitting elements disposed on the first electrode and the second electrode, a first insulating layer disposed on the light emitting elements, a first connection electrode disposed on the first electrode and electrically contacting each of the light emitting elements, and a second connection electrode disposed on the second electrode and electrically contacting each of the light emitting elements, and the first insulating layer includes a first portion and a second portion having a thickness larger than a thickness of the first portion of the first insulating layer.