Semiconductor Component Shielding Structure for Light Output
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Solution Overview
Problem
Light generated in semiconductor components is often lost due to multiple reflections and absorption by metal contacts, leading to inefficient coupling-out of electromagnetic radiation.
Innovation Solution
A component design featuring a semiconductor body with an active layer between two semiconductor layers, where a shielding structure is placed near the electrical contact layer to prevent radiation from reaching the contact layer, using a mirror layer and strategically arranged openings to reflect or scatter radiation away from absorptive surfaces, thereby enhancing light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrical contact layers are used to contact the semiconductor layers, then electrical conductivity is improved, but light output is reduced due to absorption of electromagnetic radiation by the metal contacts
Solution Approach 1:
The contact layer is segmented into multiple discrete contact regions rather than a continuous layer. This segmentation reduces the total absorbing surface area while maintaining necessary electrical contact points, thereby reducing light absorption while preserving electrical conductivity function
Solution Approach 2:
A dielectric layer is introduced as an intermediary between the metal contact regions and the semiconductor body. This dielectric layer allows electrical contact to be maintained while reducing direct optical absorption and enabling better control over light extraction paths
2Reliability
If the contact layer covers the first main surface in places, then electrical contact is improved, but harmful absorption of electromagnetic radiation increases
Solution Approach 1:
The contact layer is designed with locally optimized properties where it is present - concentrated in specific contact regions rather than uniformly distributed. This local concentration maintains electrical contact reliability at necessary points while minimizing the overall harmful absorption area
Solution Approach 2:
The previously harmful absorption by contact layers is converted into a beneficial configuration where contact regions are strategically placed and sized to minimize absorption while maximizing electrical contact effectiveness. The absorption that remains is in controlled locations that do not interfere with primary light extraction paths
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
The shielding structure effectively reduces radiation absorption by contact layers, increasing the overall light output and efficiency of the component by ensuring that emitted radiation is either reflected or coupled out without being absorbed.
Implementation Method 1
a shielding structure configured to prevent the electromagnetic radiation generated by the active layer from impinging onto the contact layer
Implementation Method 2
using a mirror layer and strategically arranged openings to reflect or scatter radiation away from absorptive surfaces
Implementation Method 3
the component includes a mirror layer, wherein the mirror layer is arranged in a vertical direction between the semiconductor body and the carrier
Data Source
AI summary
A component includes a carrier and a semiconductor body arranged on the carrier, wherein the semiconductor body has an active layer arranged between the first and second semiconductor layers and is configured to generate, during operation of the component, an electromagnetic radiation that can be coupled out from the component through a first main surface, the first main surface of the component has an electrical contact layer configured to electrically contact a first semiconductor layer and in a plan view the carrier covers the first main surface in places, and in direct vicinity of the electrical contact layer the component includes a shielding structure configured to prevent electromagnetic radiation generated by the active layer from impinging onto the contact layer.