LED Structure with Segmented Electrodes for Height Alignment
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Solution Overview
Problem
The existing LED structures face issues with poor contact between the P-type and N-type electrodes due to height differences caused by separate formation through sputtering or vapor deposition, leading to suboptimal metal bonding connections.
Innovation Solution
The LED structure incorporates a structural supporting area with slots and an insulating layer to align and electrically connect the electrodes, ensuring optimal contact during metal bonding, and includes a design where the structural supporting area surrounds the epitaxial structure to enhance mechanical strength and prevent height differences between the electrode contacting and current injection regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the P-type electrode and the N-type electrode are separately formed by sputtering or vapor deposition, then the electrodes can be formed with appropriate materials and properties, but a height difference between the electrodes occurs causing poor contact
Solution Approach 1:
The N-type electrode is segmented into two distinct parts: a first N-type electrode portion and a second N-type electrode portion. The first portion is formed at a first height level while the second portion is formed at a second height level, allowing each segment to be independently formed and positioned to achieve proper alignment with corresponding electrodes without requiring perfect height uniformity across the entire electrode structure
Solution Approach 2:
The patent introduces a vertical height dimension differentiation by forming electrode portions at different height levels. This multi-level structure allows the first N-type electrode portion to contact the N-type semiconductor layer at one height while the second N-type electrode portion contacts the P-type electrode at a different height, resolving the alignment issue through dimensional variation
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 configuration ensures improved electrical contact and mechanical strength of the LED structure by aligning electrodes and preventing height differences, thereby enhancing the overall performance and reliability of the LED device.
Implementation Method 1
Since the P-type electrode and the N-type electrode are separately formed by sputtering or vapor deposition
Implementation Method 2
Since the P-type electrode and the N-type electrode are separately formed by sputtering or vapor deposition
Data Source
AI summary
A light emitting diode structure includes a first electrode, a second electrode, and an epitaxial structure. The epitaxial structure is divided into a base area and a structural supporting area. The base area includes a bottom portion and a top portion. The top portion protrudes from a surface of the bottom portion along a single direction. The light emitting diode structure is square. The structural supporting area is positioned at a side of the top portion and protrudes from the surface of the bottom portion beside the top portion along the same direction. A top of the structural supporting area is aligned with a top of the top portion. The first electrode is arranged on the top of the top portion. The second electrode is arranged on the top of the structural supporting area. The second electrode arranged on the structural supporting area is aligned with the first electrode.