Optical Interposer Bonding for Signal Integration
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Solution Overview
Problem
Current optical and electrical signal processing technologies face challenges in integrating long-range optical components with short-range electrical components effectively, particularly in the conversion and processing of signals, leading to inefficiencies in signal transmission and processing.
Innovation Solution
The development of an optical interposer that includes a photonic integrated circuit (PIC) with a silicon-on-insulator substrate, featuring a concave surface substrate bonded to a semiconductor device using a dielectric-to-dielectric and metal-to-metal bonding process, allowing for efficient integration of optical and electrical components for enhanced signal conversion and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If optical fibers are used for long-range signal transmission, then transmission distance is improved, but integration with short-range electrical components becomes more complex
Solution Approach 1:
The device is segmented into separate optical and electrical components that are independently optimized and then integrated through a standardized interface. The optical subsystem handles long-range transmission while the electrical subsystem handles short-range communication, with each subsystem maintaining its own optimization parameters.
Solution Approach 2:
A coupling interface is introduced as an intermediary between optical and electrical components, enabling seamless signal conversion and integration. This intermediary layer resolves the incompatibility between different signal types and transmission modes while maintaining optimal performance for both subsystems.
2Productivity
If optical and electrical components are integrated in a single package, then signal conversion efficiency is improved, but manufacturing defects such as voids and dishing increase
Solution Approach 1:
The bonding surfaces are prepared in advance with specific surface treatments and alignments before the actual bonding process. This preliminary preparation ensures optimal bonding conditions, reducing the formation of voids and dishing defects while maintaining high signal conversion efficiency.
Solution Approach 2:
Bonding parameters such as temperature, pressure, and alignment are precisely controlled and optimized to minimize defects. By adjusting these parameters within specific ranges, the bonding process achieves both high integration quality and low defect rates.
3Strength
If dielectric-to-dielectric and metal-to-metal bonding is used for component integration, then bonding strength is improved, but process complexity increases
Solution Approach 1:
Multiple bonding operations are merged into a single integrated bonding process. The dielectric-to-dielectric and metal-to-metal bonding are performed simultaneously or in a closely integrated sequence, reducing the number of separate process steps while maintaining the strength benefits of both bonding types.
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 solution enables improved signal transmission and processing by facilitating effective integration of optical and electrical components, enhancing bandwidth and reducing defects, voids, and dishing issues, thereby improving the overall yield and performance of signal conversion and processing.
Implementation Method 1
bonded to a semiconductor device using a dielectric-to-dielectric and metal-to-metal bonding process
Implementation Method 2
bonded to a semiconductor device using a dielectric-to-dielectric and metal-to-metal bonding process
Data Source
AI summary
Optical devices and methods of manufacture are presented in which a first mask is utilized for multiple purposes. Some methods include depositing a first mask over a support material, forming a concave surface in the support material through the first mask, and bonding the first mask to a first bonding layer over an optical interposer.