Display Electrode Insulation Layout to Prevent Air Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face issues with air gaps forming under light-emitting elements, leading to potential breaking or poor contact of contact electrodes, which can result in electrical shorts or poor performance.
Innovation Solution
A display device design featuring inorganic insulation layers with different etch selectivities is implemented, where a first insulation layer partially covers electrodes and exposes them to form contact points for light-emitting elements, preventing air gaps and ensuring smooth contact with both ends of the elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light emitting element contacts the contact electrode directly, then electrical connection is achieved, but air gaps may form causing breaking or poor contact of the contact electrode
Solution Approach 1:
The patent introduces an insulation layer as an intermediary component between the contact electrode and the light emitting element. This insulation layer includes a first region that contacts the light emitting element and a second region that contacts the contact electrode, serving as a mediator that prevents direct contact while ensuring electrical connection through its conductive properties, thereby eliminating air gaps and preventing contact electrode breaking
Solution Approach 2:
The patent modifies the physical and chemical parameters of the insulation layer, specifically its etch selectivity relative to the inorganic insulation layer. By controlling the etch selectivity ratio between 1:1 and 10:1, the insulation layer can be selectively removed in certain regions to expose the contact electrode while maintaining structural integrity in other regions, thus preventing air gap formation without compromising electrical connection
2Reliability
If inorganic insulation layer patterns with different etch selectivities are formed, then air gaps are prevented, but manufacturing process complexity increases
Solution Approach 1:
The patent applies local quality by creating regions with different etch selectivity characteristics within the insulation layer. The first region having different etch selectivity than the second region allows selective removal in specific areas during manufacturing, enabling precise control over where air gaps are prevented while simplifying the overall manufacturing process by localizing the complexity to specific regions rather than the entire 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 design effectively prevents air gaps and ensures reliable electrical contact, reducing the risk of electrode breakage and short circuits, thereby enhancing the stability and performance of the display device.
Implementation Method 1
A material of the first insulation layer and a material of the second insulation layer may have different etch selectivities
Data Source
AI summary
A display device includes a first electrode, a second electrode spaced apart from the first electrode to face the first electrode, a first insulation layer, at least one light emitting element, a second insulation layer, a first contact electrode, and a second contact electrode. The first insulation layer includes an overlapping area which overlaps the at least one light emitting element, a first non-overlapping area which extends outward from the first end of the at least one light emitting element and does not overlap the at least one light emitting element, and a second non-overlapping area which extends outward from the second end of the at least one light emitting element and does not overlap the at least one light emitting element.