Optoelectronic Semiconductor Component with Segmented Conversion Layers
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Solution Overview
Problem
Existing optoelectronic semiconductor components often exhibit color inhomogeneity when viewed from different angles due to variations in light emission characteristics across their surface, leading to an uneven color impression.
Innovation Solution
A method involving the application of wavelength-converting materials, specifically phosphor-containing resins, to the semiconductor chips and their surrounding areas, forming distinct conversion layers that adjust and homogenize the color of emitted light across the viewing angle by converting blue light into yellow and other wavelengths, ensuring a uniform color impression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single conversion material is applied to the semiconductor chip, then the manufacturing process is simple, but the color homogeneity across viewing angles is poor
Solution Approach 1:
The patent divides the conversion material application into two distinct segments: a first conversion material applied to the side faces of the semiconductor chip and a second conversion material applied to the radiation emission surface. This segmentation allows each material to be optimized for its specific location, improving color homogeneity across different viewing angles while maintaining a manageable manufacturing process.
Solution Approach 2:
The patent applies different conversion materials with different properties to different locations on the semiconductor chip. The first conversion material is specifically applied to side faces to address light emission from that region, while the second conversion material is applied to the radiation emission surface. This local quality approach ensures that each area contributes to homogeneous color output from its specific viewing angle.
2Manufacturing precision
If phosphor particle concentration is increased to improve color conversion, then color homogeneity improves, but manufacturing complexity increases
Solution Approach 1:
The patent segments the phosphor particle concentration control into two independent parameters: concentration in the first conversion material and concentration in the second conversion material. This allows each concentration to be optimized independently for its specific location, achieving color homogeneity without requiring complex overall concentration control.
Solution Approach 2:
The patent changes the parameter of phosphor particle concentration differently for the two conversion materials. By adjusting the concentration of phosphor particles in each material separately, the patent optimizes color conversion efficiency for each location, achieving homogeneous color output while maintaining manageable manufacturing 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
The method achieves a homogeneous color impression over the viewing angle by strategically applying and simulating the concentration of phosphor particles in the conversion layers, reducing color inhomogeneities and enhancing the light emission characteristics to produce mixed-color light with a color point in the white range of the CIE standard color chart.
Implementation Method 1
The first conversion material is capable of converting electromagnetic radiation of the first wavelength range into electromagnetic radiation of a second wavelength range that differs from the first. The first conversion material is a liquid resin into which phosphor particles are incorporated.
Implementation Method 2
The second conversion material is suitable for converting electromagnetic radiation of the first wavelength range into electromagnetic radiation of the second wavelength range or a third wavelength range
Data Source
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AI summary
The invention relates to a semiconductor component, comprising a semiconductor chip (1), which emits electromagnetic radiation of a first wavelength range from a radiation emission surface (5). The semiconductor component also comprises a first conversion layer (11) on a lateral flank (6) of the semiconductor chip (1), which first conversion layer is suitable for converting electromagnetic radiation of the first wavelength range into electromagnetic radiation of a second wavelength range, and a second conversion layer (12) on the radiation emission surface (5) of the semiconductor chip (1), which second conversion layer is suitable for converting electromagnetic radiation of the first wavelength range into electromagnetic radiation of the second or of a third wavelength range. The first conversion layer (11) is different from the second conversion layer (12). The invention further relates to a method for producing such a semiconductor component.