Anti-Reflection Dielectric Stack for Optoelectronic Devices
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Solution Overview
Problem
Existing optoelectronic integrated circuits face challenges in enhancing light sensitivity and resonance characteristics due to light reflection and refraction issues at dielectric layer interfaces, which complicates production and increases costs.
Innovation Solution
A method involving the formation of a thinner anti-reflection layer comprising two dielectric layers with specific thicknesses to minimize light attenuation and resonance effects, using silicon nitride and oxide materials, and ensuring conformal coverage to protect the optoelectronic device from water vapor and metal ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional multilayer dielectric structure is used, then light sensitivity can be improved, but light reflection and refraction at interfaces cause resonance effects that complicate production and increase costs
Solution Approach 1:
The patent extracts and removes the problematic intermediate dielectric layers that cause multiple interfaces for light reflection and refraction. By eliminating these layers, the design reduces resonance effects while maintaining light sensitivity, thereby simplifying the manufacturing process without sacrificing optical performance
Solution Approach 2:
The patent employs composite material structures with specific refractive indices arranged in a optimized sequence. By carefully selecting materials with complementary optical properties, the design achieves reduced light reflection and refraction at interfaces, improving light sensitivity while avoiding the complexity of conventional multilayer dielectric stacks
2Reliability
If anti-reflection layers are added to reduce light reflection, then light sensitivity improves, but the production process becomes more complicated with strict thickness control requirements
Solution Approach 1:
The patent optimizes the thickness parameters of dielectric layers to specific ranges that naturally minimize reflection and refraction effects. By carefully controlling layer thicknesses within defined parameters, the design achieves anti-reflection functionality without requiring complex additional layers or strict manufacturing tolerances, thereby improving light sensitivity while maintaining manufacturing ease
3Reliability
If multiple dielectric layers are stacked to improve optoelectronic properties, then light sensitivity enhances, but resonance caused by reflection and refraction at interfaces increases
Solution Approach 1:
The patent converts the potentially harmful resonance effects into beneficial outcomes by strategically designing dielectric layer thicknesses and material compositions. The same multilayer structure that could cause resonance is designed with specific parameters that transform reflected and refracted light into constructive interference patterns, thereby enhancing light sensitivity while eliminating harmful resonance
Solution Approach 2:
The patent uses composite material structures with specifically selected refractive indices and thicknesses to control light propagation. By combining materials with complementary optical properties in a optimized configuration, the design achieves reduced resonance effects while maintaining enhanced light sensitivity, converting what could be harmful interface effects into beneficial optical performance
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 solution effectively reduces light resonance and enhances light sensitivity by minimizing reflection and refraction, simplifying the production process while maintaining optimal optoelectronic properties and protecting the device from environmental influences.
Implementation Method 1
light reflection and refraction issues at dielectric layer interfaces
Implementation Method 2
light reflection and refraction issues at dielectric layer interfaces
Implementation Method 3
forming a thinner anti-reflection layer comprising two dielectric layers with specific thicknesses to minimize light attenuation and resonance effects
Implementation Method 4
the optical sensor unit converts the number of photons into electronic signals
Data Source
AI summary
A method of manufacturing an optoelectronic integrated device can include: providing a semiconductor substrate including at least one optoelectronic device in the semiconductor substrate; forming a first dielectric layer on a first surface of the semiconductor substrate; forming a multilayer insulating layer on the first dielectric layer; forming a first opening in the multilayer insulating layer to expose the first dielectric layer above the optoelectronic device area; and forming a second dielectric layer on the dielectric layer, where the first dielectric layer and the second dielectric layer are anti-reflection layers.