Optical Wiring Substrate Structure for Stable Coupling Alignment
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Solution Overview
Problem
Existing wiring substrates face challenges in maintaining efficient optical coupling between optical and electrical components due to thermal expansion and contraction, leading to misalignment and reduced coupling efficiency.
Innovation Solution
A wiring substrate design that includes an optical wiring part supported by a support substrate positioned above the optical wiring, which suppresses thermal expansion and contraction of the optical wiring, ensuring precise alignment and efficient optical coupling with electrical components through the use of a common support member spanning across both regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical wiring is directly formed on the electrical wiring part without additional support, then device complexity is reduced, but thermal expansion and contraction cause misalignment and reduced optical coupling efficiency
Solution Approach 1:
A support substrate is introduced as an intermediary component between the optical wiring and the electrical wiring part. This support substrate provides mechanical stability and thermal expansion control, acting as a mediator that prevents direct thermal interaction while maintaining optical coupling. The support substrate is positioned in the optical wiring region on the opposite side with respect to the electrical wiring part, creating a sandwich structure that stabilizes the optical wiring.
2Reliability
If the support substrate is positioned close to the optical wiring to maximize stability, then optical coupling efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The support substrate is pre-positioned and fixed on the electrical wiring part before the optical wiring is formed. This preliminary action establishes a stable reference framework that guides subsequent optical wiring placement. By preparing the support structure in advance, the system reduces the precision requirements for final optical alignment during assembly.
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 design maintains stable optical coupling efficiency by minimizing positional misalignment and thermal expansion effects, enhancing the performance of optical and electrical connections on the substrate.
Implementation Method 1
the support substrate is formed on the optical wiring such that the support substrate is positioned in the optical wiring region of the electrical wiring part on the opposite side with respect to the electrical wiring part
Data Source
AI summary
A wiring substrate includes an electrical wiring part including an insulating layer and a conductor layer and having an optical wiring region and a component region, an optical wiring is formed on a surface of the electrical wiring part such that optical wiring is positioned in the optical wiring region of the electrical wiring part, and a support substrate formed on the optical wiring such that the support substrate is positioned in the optical wiring region of the electrical wiring part on the opposite side with respect to the electrical wiring part. The component region of the electrical wiring part positions a component on the surface of the electrical wiring part.