Inclined Electrode Structure for Current Leak Suppression
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Solution Overview
Problem
Current electronic devices using organic layers face significant challenges in suppressing current leaks between adjacent elements, leading to unintended light emission and noise generation, which deteriorate the device's characteristics.
Innovation Solution
The electronic device incorporates a configuration with an insulating layer having an inclined portion, a first electrode with portions on the inclined and flat regions, and a functional layer with varying thicknesses on these regions, ensuring effective suppression of current leaks between adjacent elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the organic layer on the inclined portion is increased to suppress current leak between adjacent elements, then current leak suppression improves, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The insulating layer with inclined portions is formed in advance before the organic layer is deposited. This preliminary structuring creates a geometric configuration that inherently guides the organic layer formation and facilitates uniform thickness control across different regions, thereby suppressing current leaks without requiring complex post-processing or precise real-time thickness adjustment during organic layer deposition.
Solution Approach 2:
The solution transitions from controlling only the vertical thickness dimension to utilizing the inclined geometric dimension. By forming the insulating layer at an angle rather than as a flat layer, the patent creates a three-dimensional structure where the inclination angle itself becomes a controllable parameter that influences current leak suppression, adding a spatial dimension to the thickness control strategy.
2Reliability
If the organic layer thickness is uniformly increased across all regions to suppress current leak, then current leak suppression improves, but the manufacturing precision and material consumption increase
Solution Approach 1:
The insulating layer is designed with different thickness characteristics in different spatial regions: it has a first thickness in the first region and a second thickness in the second region. This local differentiation allows the organic layer to achieve optimal thickness distribution automatically during deposition, suppressing current leaks in critical areas without requiring uniform thickness increase across the entire device, thereby reducing material consumption and manufacturing complexity.
Data Source
AI summary
An electronic device including elements arranged on a substrate, each of the elements including an insulating layer, a first electrode, a functional layer, and a second electrode in mentioned order starting from a side closer to the substrate. The insulating layer has an inclined portion that is inclined relative to the substrate. The first electrode has a first portion positioned on the inclined portion and a second portion in contact with the functional layer. The second portion has a smaller inclination angle relative to the substrate than the first portion. A thickness of the functional layer positioned on the first portion in a direction normal to a functional layer surface in contact with the first portion is smaller than a thickness of the functional layer positioned on the second portion in a direction normal to a functional layer surface in contact with the second portion.