Optical Integrated Device Selective Area Growth Mask Patterns
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Solution Overview
Problem
Current optical integrated device manufacturing methods lack efficiency and productivity in producing high-capacity, high-speed optical communication components that require precise energy band gaps and diverse core functionalities for advanced network infrastructure.
Innovation Solution
A method involving selective area growth using mask patterns of varying widths and materials to form multiple core layers with specific energy band gaps, including passive waveguide, electro-optic modulator, laser diode, and photodiode cores, within an optical integrated device, enhancing productivity and device performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional manufacturing methods are used, then device structure is simple, but productivity is low and manufacturing efficiency is poor
Solution Approach 1:
The patent divides the manufacturing process into distinct stages: forming mask patterns with different widths, selective area growth of core layers, and differentiated doping processes. Each mask pattern (first, second, third mask patterns) corresponds to specific device regions, enabling parallel processing of multiple device types simultaneously, thereby improving productivity without compromising structural precision
Solution Approach 2:
The patent applies local quality by using mask patterns of different widths to create core layers with different energy band gaps in specific regions. The first mask pattern forms a first core layer with a first energy band gap, the second mask pattern forms a second core layer with a second energy band gap, and the third mask pattern forms a third core layer with a third energy band gap. This localized differentiation enables diverse device functionalities within a single integrated structure, improving manufacturing efficiency while maintaining precise structural control
2Productivity
If multiple device types are manufactured separately, then each device can be optimized, but manufacturing time and productivity are reduced
Solution Approach 1:
The patent merges the manufacturing of multiple device types (detectors, modulators, amplifiers) into a single integrated process. Multiple core layers with different energy band gaps are formed simultaneously using selective area growth with different mask patterns, and doping is performed in an integrated manner. This merging approach maintains precise energy band gap control for each device type while significantly improving manufacturing speed and productivity
Solution Approach 2:
The patent changes key parameters (mask pattern width, growth conditions, doping concentrations) to achieve different energy band gaps in different regions. By adjusting mask pattern widths and controlling selective area growth parameters, the patent precisely controls the energy band gap of each core layer while manufacturing multiple device types in parallel, thereby maintaining manufacturing precision while improving overall productivity
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 allows for simultaneous formation of multiple optical device cores with tailored energy band gaps, improving both productivity and performance by enabling high-capacity, high-speed, and high-temperature operation in optical communication networks.
Implementation Method 1
forming a core layer on a portion of the lower clad layer by a selective area growth method using the mask patterns as deposition masks
Data Source
AI summary
Provided is a method of manufacturing an optical integrated device. The method includes forming a lower clad layer on a substrate, forming a plurality of mask patterns arranged in one direction on the lower clad layer, forming a core layer on a portion of the lower clad layer by a selective area growth method using the mask patterns as deposition masks, and forming an upper clad layer on the core layers, wherein the mask patterns have different widths or include mask layers of different materials.