Optical Waveguide Adhesive Bonding Shift
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Solution Overview
Problem
Existing optical waveguide structures face challenges in enhancing the mechanical properties, such as bending rigidity and tensile strength, of subassemblies that integrate the waveguide structure with other components.
Innovation Solution
The proposed optical waveguide structure includes a first member with a first surface, a waveguide layer with a core layer and a cladding layer having a protruding portion and an inclined portion, a second member arranged on the opposite side of the waveguide layer's end portion, and an adhesive that joins the cladding layer and the second member at a position shifted from the inclined portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the adhesive joins the cladding layer and the second member at the inclined portion, then the bonding area is maximized, but adhesive penetration failure occurs reducing bonding strength
Solution Approach 1:
The patent extracts the adhesive application area from the inclined portion and relocates it to the peripheral portion. This separation removes the harmful effect of adhesive penetration failure at the inclined portion while preserving the bonding function, thereby maintaining bonding strength without compromising reliability.
Solution Approach 2:
The patent applies different joining strategies to different regions: the inclined portion is left without adhesive to avoid penetration failures, while the peripheral portion receives adhesive application to maintain bonding strength. This localized differentiation resolves the contradiction between maximizing bonding area and ensuring bonding reliability.
2Strength
If the cladding layer has a protruding portion at the peripheral portion, then mechanical strength is improved, but adhesive application becomes difficult
Solution Approach 1:
The patent segments the cladding layer into distinct functional zones: a protruding portion that provides mechanical strength and an inclined portion that facilitates adhesive application. This segmentation allows each region to perform its specific function optimally without interfering with the other, resolving the contradiction between mechanical strength and ease of manufacture.
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 configuration enhances the mechanical properties of the subassembly by improving bending rigidity, bending strength, shear strength, and tensile strength, while preventing bonding strength issues due to adhesive penetration failures.
Implementation Method 1
an adhesive configured to join the cladding layer and the second member at a position shifted from the inclined portion
Data Source
AI summary
An optical waveguide structure includes: a first member having a first surface facing a first direction; a waveguide layer including a core layer extending in a second direction intersecting the first direction at a position apart from the first surface, and a cladding layer surrounding the core layer on the first surface, and including a protruding portion protruding in the first direction to a peripheral portion at a position on an opposite side to the first member at least with respect to the core layer, and an inclined portion arranged at a boundary between the protruding portion and the peripheral portion; a second member arranged on an opposite side to the first member with respect to an end portion in a longitudinal direction of the waveguide layer; and an adhesive configured to join the cladding layer and the second member at a position shifted from the inclined portion.