Photonic-Electronic Integration via Segmented Layer Architecture
Solution Overview
Problem
Current photonic-electronic integration approaches face limitations such as excessive optical losses in waveguides and thermal constraints, which hinder the large-scale integration of electronic and active photonic components on a single substrate, leading to inefficiencies in device performance and manufacturing costs.
Innovation Solution
The integration of silicon-based CMOS electronics with passive and active photonic elements, including lasers and optical amplifiers, on a common semiconductor substrate, decoupling the processing of electronic and photonic devices to enhance optical coupling and reduce losses, using structural features like transition elements to facilitate efficient light transfer between photonic and electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical components and electronics are integrated in a single device, then device functionality and compactness are improved, but optical losses in waveguides and thermal constraints worsen
Solution Approach 1:
The device is divided into distinct electronic device layer and photonic device layer, allowing separate optimization of each layer while maintaining integration benefits. The electronic layer handles signal processing while the photonic layer handles optical transmission, reducing cross-interference and optimizing performance of each component type.
Solution Approach 2:
A cladding layer is introduced as an intermediary between the electronic and photonic layers. This cladding layer with refractive index between the two layers facilitates efficient optical coupling while providing thermal isolation, thereby reducing optical losses without compromising thermal management.
2Volume of moving object
If optical components and electronics are integrated in a single device, then device compactness is improved, but manufacturing complexity worsens
Solution Approach 1:
The integrated device is manufactured by separately fabricating the electronic device layer and photonic device layer on different substrates, then bonding them together. This segmentation allows each layer to be optimized for its specific manufacturing requirements while achieving final integration, reducing overall manufacturing complexity.
Solution Approach 2:
The integration is achieved through vertical stacking of electronic and photonic layers in the third dimension, rather than lateral integration in the same plane. This vertical integration approach maintains compact device footprint while simplifying manufacturing by allowing independent processing of each layer before assembly.
3Productivity
If electronic and photonic devices are processed together, then manufacturing efficiency is improved, but thermal constraints worsen
Solution Approach 1:
Electronic and photonic devices are processed separately on their respective substrates with appropriate thermal management for each type, then bonded together. This allows high-temperature photonic processing without affecting temperature-sensitive electronic components, eliminating thermal constraints while maintaining manufacturing efficiency through subsequent integration.
Solution Approach 2:
A cladding layer serves as a thermal intermediary between electronic and photonic layers, providing thermal isolation that prevents heat from electronic devices from affecting photonic components. This enables independent thermal management of each layer, resolving thermal constraints in integrated processing.
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 creation of practical photonic-electronic circuits with reduced parasitic effects, lower power consumption, and lower manufacturing costs, while allowing for more compact devices with improved performance by leveraging monolithic integration on semiconductor fabrication tools.
Implementation Method 1
a cladding layer 140 is formed over the electronic device layer 120. The cladding layer 140 has a refractive index between that of the electronic device layer 120 and the photonic device layer 130
Data Source
Figure 1
Figure 2A~2B
Figure 2C
AI summary
A device (100) includes a passive photonic layer (130p) located over a substrate (110) and including at least one passive photonic element (150) configured to propagate an optical signal therein. An electronic layer (120) located between said substrate (110) and said passive photonic layer (130p) includes at least one electronic device (122, 123, 126) configured to propagate an electrical signal therein. An active photonic layer (130a) located over said passive photonic layer (130p) includes an active photonic device (160) optically coupled to said passive photonic element (150) and configured to convert between said electrical signal and said optical signal.