Transmissive Optical Shutter Wavelength Selection Yield
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Solution Overview
Problem
Conventional transmissive optical shutters require an additional removal process to allow incident light to pass through the substrate, leading to unnecessary loss of usable region and reduced yield due to the need for forming an opening in the substrate.
Innovation Solution
A transmissive optical shutter design that transmits incident light without the need for an additional removal process by using a substrate that allows wavelengths of 870 nm or more to pass through, eliminating the need for substrate opening and enhancing optical efficiency by adjusting electrode connection positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If an additional removal process is used to form an opening in the substrate for light transmission, then light can pass through the substrate, but the usable region is reduced and yield decreases
Solution Approach 1:
The patent changes the wavelength parameter of incident light to 870 nm or more, which enables the substrate to transmit light at this specific wavelength range. This parameter change eliminates the need for opening formation while maintaining light transmission capability, thereby resolving the contradiction between light transmission and yield.
2Illumination intensity
If an additional removal process is used to form an opening in the substrate, then light can pass through, but the number of process steps increases
Solution Approach 1:
By changing the wavelength parameter to 870 nm or more, the substrate inherently transmits light without requiring additional removal processes. This simplifies the device structure and reduces the number of fabrication steps while achieving the desired light transmission function.
3Illumination intensity
If an opening is formed in the substrate, then light transmission is enabled, but loss regions increase
Solution Approach 1:
The patent utilizes the substrate's natural light transmission property at wavelengths of 870 nm or more, eliminating the need to form openings that would create loss regions. This approach preserves the entire substrate area as usable region while enabling light transmission.
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 increases yield by reducing unnecessary process steps and minimizes loss regions, allowing for a more compact and efficient optical shutter with improved optical efficiency.
Implementation Method 1
an epitaxial layer disposed over the first contact layer and configured to modulate intensity of incident light having a specific wavelength
Data Source
AI summary
A transmissive optical shutter and a method of fabricating the same are provided. The transmissive optical shutter includes a first contact layer, an epitaxial layer disposed over the first contact layer, the epitaxial layer being configured to modulate intensity of incident light having a specific wavelength, a second contact layer disposed on the epitaxial layer, a first electrode disposed on the first contact layer, at least one second electrode disposed on the second contact layer, and a substrate disposed under the first contact layer.