Gallium Nitride Multilayer Structure on Amorphous Substrates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing techniques for forming semiconductor layers containing gallium nitride are limited by the need for expensive substrates like sapphire or quartz, which hinder the expansion of display screen area and require high-temperature processing, reducing throughput.
Innovation Solution
A multilayered structure is developed using an inexpensive amorphous substrate with an insulating surface, featuring a semiconductor layer with high crystallinity made of gallium nitride, and a side protection portion also made of gallium nitride, which are separated at the side surface of the orientation layer, allowing for high-throughput manufacturing at lower temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If expensive substrates like sapphire or quartz are used, then high crystallinity gallium nitride layers can be formed, but production costs increase and substrate area expansion is limited
Solution Approach 1:
The patent replaces expensive, reusable substrates (sapphire, quartz) with inexpensive, disposable amorphous substrates. The amorphous substrate serves as a temporary platform for forming the gallium nitride layer, which is then transferred to the final device, eliminating the need for costly substrate materials in the final product.
Solution Approach 2:
The patent introduces an amorphous substrate as an intermediary medium that enables the formation of high-crystallinity gallium nitride layers without requiring expensive crystalline substrates. This intermediary allows the deposition and crystallization process to occur at lower costs while maintaining the desired material quality.
2Manufacturing precision
If high-temperature processing is used, then high crystallinity gallium nitride layers can be formed, but manufacturing throughput decreases
Solution Approach 1:
The patent changes the temperature parameter from high-temperature processing to low-temperature processing by using amorphous substrates that can be heated to lower temperatures (e.g., 400-600°C) compared to traditional substrates. This parameter change enables faster heating and cooling cycles, improving manufacturing throughput while still achieving high crystallinity through controlled deposition conditions.
Solution Approach 2:
The patent performs preliminary crystallization and orientation of the gallium nitride layer during the deposition process on the amorphous substrate, eliminating the need for subsequent high-temperature annealing steps. This preliminary action during deposition reduces the overall processing time and temperature requirements, thereby improving throughput.
3Productivity
If amorphous substrates are used, then production costs decrease and throughput improves, but achieving high crystallinity becomes more difficult
Solution Approach 1:
The amorphous substrate acts as an intermediary that facilitates low-temperature processing while the gallium nitride layer itself achieves high crystallinity through controlled deposition. The amorphous substrate provides a stable platform for deposition without requiring the substrate itself to be crystalline, thus decoupling the substrate requirements from the layer quality requirements.
Solution Approach 2:
The patent changes the deposition parameters (gas flow rates, pressure, temperature, deposition speed) to optimize crystal growth on amorphous substrates. By adjusting these parameters, high crystallinity is achieved even at lower temperatures and on amorphous surfaces, resolving the contradiction between substrate cost and layer quality.
4Reliability
If the semiconductor layer and side protection portion are separated, then device characteristics are improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the gallium nitride structure into distinct functional regions: a semiconductor layer on the amorphous substrate and a side protection portion separated at the orientation layer interface. This segmentation allows each region to be optimized independently for its specific function while simplifying the overall manufacturing process compared to integrated structures.
Solution Approach 2:
The patent applies different properties to different parts of the structure: the semiconductor layer is optimized for electrical performance with high crystallinity, while the side protection portion is optimized for mechanical protection. The separation at the orientation layer allows each part to have locally optimized characteristics without compromising the other.
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 enables the production of semiconductor devices with high crystallinity gallium nitride layers on cost-effective amorphous substrates, improving throughput and reducing production costs while maintaining excellent device characteristics.
Implementation Method 1
a semiconductor layer containing gallium nitride having a pattern arranged on the orientation layer
Implementation Method 2
a semiconductor layer containing gallium nitride having a pattern arranged on the orientation layer
Data Source
AI summary
A multilayered structure includes an amorphous substrate having an insulating surface; an orientation layer having a pattern on the amorphous substrate having the insulating surface; a semiconductor layer containing gallium nitride having a pattern arranged on the orientation layer; and a side protection portion containing gallium nitride arranged on a side surface of the orientation layer, wherein the semiconductor layer and the side protection portion are separated at the side surface of the orientation layer.