Semiconductor Light Emitting Element Reverse Voltage Protection
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Solution Overview
Problem
Semiconductor light emitting elements, such as LEDs, using nitride semiconductors are prone to breakdown when subjected to reverse voltages from static electricity or lightning, which affects their reliability and efficiency.
Innovation Solution
The semiconductor light emitting element design incorporates a conductive base body, multiple semiconductor layers of different conductivity types, and conductive layers with pad layers, where a diode functions as a protection circuit to suppress breakdown by managing reverse voltage and optimizing light emission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a semiconductor light emitting element uses a nitride semiconductor structure, then light emission function is achieved, but breakdown occurs when reverse voltage is applied
Solution Approach 1:
A diode protection circuit is introduced as an intermediary component between the light emitting element and external voltage sources. This diode conducts during reverse voltage conditions to divert harmful current away from the light emitting element, thereby protecting it from breakdown while maintaining normal operation during forward voltage conditions.
Solution Approach 2:
The protection circuit is designed to activate in advance before reverse voltage can damage the light emitting element. By configuring the diode to conduct during reverse voltage conditions, the system preemptively counteracts the harmful effect before it can cause breakdown, ensuring reliability without affecting normal light emission function.
2Reliability
If multiple semiconductor layers are added to improve protection, then reliability increases, but device complexity increases
Solution Approach 1:
The device is segmented into functionally distinct components: the light emitting element structure with multiple semiconductor layers for light emission, and a separate diode protection circuit for reverse voltage protection. This segmentation allows each component to be optimized independently while maintaining overall system reliability without excessive complexity.
Solution Approach 2:
The diode protection circuit serves multiple functions: it protects against reverse voltage breakdown, provides a clear current path during protection events, and can be integrated into existing device architectures. This multi-functionality achieves reliability improvement without proportionally increasing device complexity.
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 enhances the immunity to reverse voltage, improves luminous efficiency, and increases the reliability of semiconductor light emitting elements by effectively managing current flow and reducing light absorption, thereby maintaining high performance.
Implementation Method 1
a diode functions as a protection circuit to suppress breakdown by managing reverse voltage
Implementation Method 2
a semiconductor light emitting element such as a light emitting diode (LED)
Data Source
AI summary
According to one embodiment, a semiconductor light emitting element includes a base body, first to sixth semiconductor layers, a first conductive layer, and a first pad layer. The first semiconductor layer is separated from the base body and includes first and second semiconductor regions arranged with each other. The second semiconductor layer is provided between the second semiconductor region and the base body. The third semiconductor layer is provided between the second semiconductor region and the second semiconductor layer. The fourth semiconductor layer is separated from the base body, arranged with the first semiconductor layer. The fifth semiconductor layer is provided between the base body and one portion of the fourth semiconductor layer. The sixth semiconductor layer is provided between the fifth semiconductor layer and the one portion. The first conductive layer includes first, second, and third conductive regions. The first pad layer includes a first pad region.