Ion-Assisted Passivation for Optoelectronic Components
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Solution Overview
Problem
Optoelectronic components such as laser diodes and LEDs face challenges due to light-induced oxidation and thermal destruction, as well as degradation when exposed to moisture, leading to component failure and increased costs and complexity in hermetically sealed housings.
Innovation Solution
An ion-assisted deposition method is used to apply layers on the semiconductor layer sequence, including metal oxides and nitrides, to prevent oxidation and degradation, while also enhancing reflectivity and transmission properties, thereby protecting the components from moisture and improving durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hermetically sealed housings are used to protect optoelectronic components from moisture and oxidation, then component reliability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies a thin film passivation layer directly to the semiconductor chip surfaces to provide protection against moisture and oxidation, eliminating the need for hermetically sealed housings. This thin film approach maintains component reliability while significantly reducing device complexity and manufacturing cost.
Solution Approach 2:
The invention extracts the protective function from the housing structure and transfers it to a thin passivation layer applied directly to the chip surfaces. This separation allows the housing to be simple and open while the critical protection function is performed by the surface layer.
2Reliability
If conventional deposition methods are used to apply protective layers, then manufacturing simplicity is maintained, but layer quality and protection effectiveness are insufficient
Solution Approach 1:
The patent employs ion-assisted deposition with specific parameters (ion energy, ion flux, deposition rate) to achieve superior layer quality. The ion assistance enhances adhesion and density of the passivation layer, providing effective protection while maintaining manufacturing feasibility through controlled parameter optimization.
Solution Approach 2:
The invention uses composite material systems in the passivation layer, combining organic and inorganic components to achieve both excellent protection properties and compatibility with standard semiconductor manufacturing processes. This composite approach ensures high reliability while keeping manufacturing practical.
3Reliability
If laser facets are left unpassivated to maintain optical performance, then optical efficiency is improved, but component degradation and failure increase
Solution Approach 1:
A thin passivation film is applied to the laser facets, providing a protective barrier against oxidation and moisture while maintaining sufficient optical transmission. The thin film design minimizes optical interference while ensuring long-term durability in ambient conditions.
Solution Approach 2:
The passivation layer acts as a sacrificial protective element that prevents degradation of the critical laser facet. By providing a first line of defense, the thin layer protects the expensive and performance-critical optical surface from harmful environmental factors.
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 method effectively reduces leakage currents, prevents aging effects, and enhances the durability and performance of optoelectronic components by creating a protective passivation layer with improved optical properties and reduced scattering losses.
Implementation Method 1
applying at least one layer directly to a first surface of the semiconductor layer sequence using an ion-assisted application method
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3B
AI summary
A method for manufacturing an optoelectronic device is specified, which in particular comprises the steps A) providing a semiconductor layer sequence with at least one active region, wherein the active region is suitable for emitting electromagnetic radiation during operation, and B) depositing at least one layer on a first surface of the semiconductor layer sequence by means of an ion-assisted deposition method.