GaN-on-Silicon Trench Integration for System Efficiency
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Solution Overview
Problem
Current semiconductor technologies face challenges in integrating Gallium Nitride (GaN) structures with semiconductor devices on a single chip, limiting the efficiency and performance of optoelectronic and high-power devices due to material incompatibilities and structural limitations.
Innovation Solution
A semiconductor structure is developed with a silicon substrate featuring a trench for epitaxial growth of a Gallium-Nitride layer, which is then integrated with semiconductor structures, allowing for coplanar surfaces and the potential inclusion of an Aluminum-Gallium-Nitride layer, enabling efficient embedding of GaN regions within the substrate and facilitating the creation of both GaN and semiconductor devices on a single substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If GaN structures are integrated with semiconductor devices on a single chip, then system efficiency and device performance are improved, but material incompatibilities and structural limitations cause integration challenges
Solution Approach 1:
The patent divides the substrate into distinct regions: a first substrate region for semiconductor devices and a second substrate region for GaN structures. This segmentation allows each material to be processed and integrated in its optimal environment, reducing integration complexity while maintaining system efficiency.
Solution Approach 2:
The patent applies different material properties and structural configurations to different regions of the substrate. The semiconductor devices are fabricated with properties optimized for their function, while GaN structures are configured with properties optimized for their specific applications, allowing both to coexist on the same chip without compromising performance.
2Length of moving object
If GaN and semiconductor devices are developed in parallel on a single substrate, then material distances are reduced and performance is improved, but voltage drop increases
Solution Approach 1:
The patent introduces an intermediary structure or configuration between the GaN devices and semiconductor devices that manages electrical connections and minimizes voltage drop. This intermediary element allows the short material distances to be maintained while compensating for the energy loss through its specific electrical properties or configuration.
3Ease of manufacture
If a trench is created in the silicon substrate for epitaxial growth of GaN layer, then GaN structures can be embedded in the substrate, but the substrate structure becomes more complex
Solution Approach 1:
The patent creates the trench in the silicon substrate in advance, before the epitaxial growth of the GaN layer. This preliminary action prepares the substrate structure to receive and accommodate the GaN layer, making the subsequent embedding process easier and more straightforward despite the increased substrate 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
This integration reduces voltage drop and enhances overall system efficiency by allowing for the parallel development and integration of GaN and semiconductor devices, improving performance and reducing material distances between them.
Implementation Method 1
A gallium-nitride layer may be located in the trench
Data Source
AI summary
A method and structure for integrating gallium nitride into a semiconductor substrate. The method may also include means for isolating the gallium nitride from the semiconductor substrate.