Display Electrode Structure With Gap-Filling Insulation for LED Contact
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Solution Overview
Problem
Inorganic light emitting diodes face issues with interface defects and gaps in the insulating layer, leading to potential damage to light emitting elements and poor contact with electrodes during the manufacturing process of display devices.
Innovation Solution
An organic insulating layer is formed on top of an inorganic insulating layer to fill defects and gaps, ensuring proper alignment and contact of light emitting elements, thereby preventing disconnection and short-circuit failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic insulating layer is used to fix the light emitting element, then the light emitting element can be aligned and fixed, but interface defects (seams) and gaps are formed around and below the light emitting element
Solution Approach 1:
The patent uses a composite insulating layer structure combining inorganic and organic materials. The inorganic insulating layer provides fixation and alignment, while the organic insulating layer fills the interface defects and gaps formed by the inorganic layer, creating a composite structure that achieves both fixation reliability and interface completeness
Solution Approach 2:
The organic insulating layer acts as an intermediary substance that fills the gaps and defects between the inorganic insulating layer and the light emitting element. This intermediary layer prevents direct contact between the light emitting element and defective regions, ensuring proper electrical isolation and mechanical support
2Reliability
If an inorganic insulating layer is used, then the light emitting element can be fixed, but damage to the light emitting element or poor contact with electrodes may occur during manufacturing
Solution Approach 1:
The organic insulating layer is formed beforehand to fill defects and gaps in the inorganic insulating layer before subsequent manufacturing processes. This preventive measure cushions against potential damage and ensures good contact by eliminating voids and defects that could cause problems during electrode formation and wire bonding
Solution Approach 2:
The organic insulating layer serves as a protective intermediary between the light emitting element and the external environment during manufacturing. It provides a smooth, defect-free surface that facilitates proper electrode contact and protects the light emitting element from damage during handling and processing
Data Source
AI summary
A display device and a method of manufacturing a display device are provided. The display device comprises a first electrode, a second electrode facing the first electrode, a first insulating layer disposed on the first electrode and the second electrode and positioned between the first electrode and the second electrode, a light emitting element disposed on the first insulating layer, a first passivation layer covering the light emitting element and exposing both end portions of the light emitting element, an organic insulating layer disposed on the first passivation layer, a first contact electrode electrically connected to the first electrode, disposed on the organic insulating layer and in contact with a first end portion of the light emitting element exposed by the first passivation layer, and a second contact electrode electrically connected to the second electrode, disposed on the organic insulating layer and in contact with a second end portion of the light emitting element exposed by the first passivation layer.