Light Emitting Element Segmented Electrodes for Uniform Emission
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Solution Overview
Problem
Existing light emitting elements experience uneven distribution of current density between electrodes, leading to non-uniform emission.
Innovation Solution
The light emitting element features specific electrode configurations with extending portions that diffuse current uniformly across the semiconductor stack, including first and second electrodes with connecting portions and extending portions arranged to minimize current density variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrode structures are used with one electrode at center and other embracing it, then current density distribution is improved, but uneven distribution still occurs between electrodes causing non-uniform emission
Solution Approach 1:
The first electrode is divided into multiple segments (first electrode segment, second electrode segment, third electrode segment) arranged in a specific pattern. This segmentation allows each segment to independently control current flow to different regions of the light emitting element, enabling precise adjustment of current density distribution across the emission surface.
Solution Approach 2:
Different electrode segments are positioned to provide localized current control. The first electrode segment is disposed at a first region, the second electrode segment at a second region, and the third electrode segment at a third region, allowing each segment to optimize current density in its specific area to achieve overall uniform emission.
2Reliability
If electrode structures are designed to achieve uniform current density, then emission uniformity improves, but device complexity increases due to multiple extending portions and bent portions
Solution Approach 1:
The electrode is segmented into multiple portions (first, second, third electrode segments) with specific geometric configurations including extending portions and bent portions. Each segment serves a specific function in controlling current distribution to achieve uniform emission across the light emitting element surface.
Solution Approach 2:
The electrode structure utilizes three-dimensional configuration with extending portions that protrude from the semiconductor substrate surface and bent portions that create specific spatial arrangements. This dimensional complexity enables precise current control while maintaining manufacturability through standard semiconductor fabrication processes.
Data Source
AI summary
A light emitting element includes: a semiconductor structure; first and second electrodes formed above the semiconductor structure. In a plan view: the first electrode consists of a first pad electrode configured to be bonded with a first conductive wire and electrically connected to a first external electrode or a first external terminal, a first extending portion extending from the first pad electrode, and two second extending portions extending from the first pad electrode, the second electrode consists of a second pad electrode configured to be bonded with a second conductive wire and electrically connected to a second external electrode or a second external terminal, and two third extending portions extending from the second pad electrode.