Semiconductor Recess Facets for Uniform Charge Injection
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Solution Overview
Problem
In optoelectronic components with a semiconductor active zone, charge carriers are not evenly distributed, leading to efficiency losses due to uneven injection and penetration through the active zone.
Innovation Solution
A semiconductor component with a multiple quantum well structure and recesses in the p-side semiconductor layer, where the recesses have obliquely angled facets to facilitate even charge carrier injection, and a barrier structure that blocks charge carrier penetration through the main surface, directing current flow through the recesses for uniform distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If charge carriers are injected into the active zone without recesses, then the injection process is simpler, but the charge carrier distribution becomes uneven leading to efficiency losses
Solution Approach 1:
The patent segments the active zone surface by forming multiple recesses (V-pits) in the p-side semiconductor layer. These recesses divide the injection area into multiple facets, allowing charge carriers to be injected through different angled surfaces rather than a single flat surface, thereby achieving more uniform distribution across the active zone.
Solution Approach 2:
The patent applies local quality by creating recesses with specific geometric properties (angled facets) in particular regions of the active zone. The oblique angles of the recess facets (e.g., 30°, 45°, or 60°) are specifically designed to optimize charge carrier injection and distribution in those local areas, improving overall efficiency.
2Productivity
If a barrier structure is added to block charge carriers, then uniform charge carrier distribution is achieved, but the device complexity increases
Solution Approach 1:
The patent implements preliminary action by forming the barrier structure at the bottom of the recesses before final device operation. This pre-positioned barrier structure proactively prevents charge carrier penetration through the main surface, ensuring uniform distribution is achieved by design rather than by corrective measures during operation.
Solution Approach 2:
The barrier structure acts as an intermediary element between the recesses and the active zone. It mediates charge carrier flow by blocking penetration through the main surface while allowing controlled injection through the recess facets, thereby achieving uniform distribution without requiring complete structural redesign.
3Productivity
If recesses with oblique facets are formed, then charge carrier injection through facets is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by specifying particular facet angle ranges (e.g., 30°, 45°, or 60°) that optimize charge carrier injection efficiency. By identifying and implementing these specific angular parameters, the patent achieves enhanced injection efficiency while providing clear manufacturing targets that balance precision requirements with performance benefits.
Data Source
AI summary
A component having an enhanced efficiency and a method for producing a component are disclosed. In an embodiment, a component includes a semiconductor layer sequence comprising a p-conducting semiconductor layer, an n-conducting semiconductor layer and an active zone located therebetween, wherein the active zone comprises recesses on a side of the p-conducting semiconductor layer, each recess having facets extending obliquely to a main surface of the active zone, and wherein the p-conducting semiconductor layer extends into the recesses, and a barrier structure, wherein the active zone is arranged between the barrier structure and the n-conducting semiconductor layer so that an injection of positively charged charge carriers into the active zone via the main surface is hindered in a targeted manner so that an injection of positively charged charge carriers into the active zone via the facets is promoted.