Ceramic LED Substrates for Thermal Management and Light Extraction
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Solution Overview
Problem
There is a need for improved light emitter device components and methods that enhance light extraction and thermal efficiency while reducing production costs and improving manufacturability and yield in high-efficiency LEDs.
Innovation Solution
The use of ceramic-based substrates with high reflective properties and non-metallic layers for mounting LED chips, along with advanced phosphor coating methods and encapsulants, to create high-brightness LED components that optimize light extraction and thermal management, eliminating the need for resource-intensive metal-based processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If metal-based processes and materials are used for mounting LED chips, then thermal conductivity is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces metal-based mounting structures with ceramic-based substrates that integrate thermal management functions. The ceramic substrate eliminates the need for separate metal heat sinks and complex mechanical assembly, achieving thermal efficiency through material properties rather than complex mechanical systems.
Solution Approach 2:
The ceramic substrate serves multiple functions simultaneously: it provides mechanical support for LED chips, acts as a heat sink for thermal management, and offers optical reflection properties. This multi-functionality consolidates what would otherwise require separate metal components into a single integrated structure.
2Illumination intensity
If conventional packaging methods are used, then manufacturing simplicity is maintained, but light extraction efficiency decreases
Solution Approach 1:
The patent modifies optical parameters by incorporating reflective layers and optimizing phosphor distribution within the encapsulant. These parameter changes enhance light extraction efficiency without fundamentally altering the packaging process, maintaining manufacturability while improving brightness.
Solution Approach 2:
The encapsulant is formulated as a composite material containing phosphors dispersed within the matrix. This composite structure enables enhanced light extraction through phosphor conversion while maintaining the ease of application associated with conventional encapsulation methods.
3Temperature
If resource-intensive metal-based processes are used, then thermal management is improved, but production cost increases
Solution Approach 1:
The patent employs ceramic substrates that provide effective thermal management at lower cost than metal alternatives. The ceramic material offers sufficient thermal conductivity for LED applications without requiring the expensive metal-based thermal management systems, reducing production costs while maintaining adequate thermal control.
Solution Approach 2:
The patent changes the material parameter from metal to ceramic, which has different thermal and optical properties. This parameter change enables thermal management functionality at reduced cost, as ceramic materials can be manufactured more economically than precision metal components while providing adequate heat dissipation.
4Illumination intensity
If ceramic substrates with high reflective properties are used, then light extraction is improved, but material cost increases
Solution Approach 1:
The patent uses ceramic substrates composed of cost-effective materials such as alumina or aluminum nitride that provide both thermal management and optical reflection properties. These composite ceramic materials achieve high light extraction efficiency without the excessive costs associated with premium reflective materials, balancing performance and material cost.
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
This approach results in higher brightness, improved thermal efficiency, and increased manufacturability of LED components, reducing production costs and enhancing the reliability and performance of LED devices by utilizing ceramic substrates for enhanced reflection and thermal management.
Implementation Method 1
ceramic-based substrates with high reflective properties
Implementation Method 2
thermal management, eliminating the need for resource-intensive metal-based processes
Data Source
AI summary
Devices, components and methods containing one or more light emitter devices, such as light emitting diodes (LEDs) or LED chips, are disclosed. In one aspect, a light emitter device component can include a ceramic body having a top surface, one or more light emitter devices mounted directly or indirectly on the top surface, and one or more electrical components mounted on the top surface and electrically coupled to the one or more light emitter devices, wherein the one or more electrical components can be spaced from the ceramic body by one or more non-metallic layers. Components disclosed herein can result in improved light extraction and thermal management.