Coupled Waveguide Bonding With Anisotropic Film for Alignment Tolerance
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Solution Overview
Problem
Existing waveguide coupling methods require precise positioning of opening windows, leading to potential impedance mismatch and degradation of transmission characteristics.
Innovation Solution
A coupled waveguide design using anisotropic conductive films to bond waveguides, with overlapping opening windows and conductive particles, ensuring easy manufacturing and maintaining transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If opening windows are highly accurately positioned using a frame-shaped conductive joint, then waveguide coupling is achieved, but manufacturing complexity increases and transmission characteristics may degrade due to impedance mismatch
Solution Approach 1:
An anisotropic conductive film is introduced as an intermediary bonding material between the first and second waveguides. This film contains conductive particles that provide electrical connection while allowing optical transparency, eliminating the need for complex frame-shaped conductive joints and simplifying the overall coupling structure
Solution Approach 2:
The patent changes the bonding method from mechanical framing to chemical/adhesive bonding using anisotropic conductive film. This parameter change in the bonding mechanism reduces manufacturing precision requirements for window positioning while maintaining effective waveguide coupling
2Ease of manufacture
If opening window widths are increased to provide positioning margin, then ease of manufacture improves, but impedance mismatch occurs and transmission characteristics degrade
Solution Approach 1:
The patent maintains narrow opening window widths (providing good impedance matching) while using anisotropic conductive film bonding to achieve ease of manufacture. The bonding method provides sufficient alignment tolerance without requiring window width increases, thus maintaining both ease of manufacture and transmission characteristics
3Ease of manufacture
If conventional bonding methods are used, then waveguides are coupled, but alignment precision requirements increase manufacturing difficulty
Solution Approach 1:
The anisotropic conductive film serves as a mediator that accommodates alignment tolerances through its material properties. The film's conductive particles can deform and conform to slight misalignments, providing robust bonding without requiring high alignment precision
Solution Approach 2:
The patent uses a thin film structure (anisotropic conductive film) that provides flexibility in the bonding process. This thin film can be easily applied and conforms to the waveguide surfaces, simplifying the coupling process while maintaining electrical connection
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
Facilitates easy alignment and manufacturing while reducing signal reflection and improving transmission characteristics by using high-density conductive particles in the anisotropic conductive film.
Implementation Method 1
an anisotropic conductive film covering the first opening window and the second opening window and bonding the first waveguide and the second waveguide
Data Source
AI summary
To provide a coupled waveguide that can be easily manufactured and avoid degradation of transmission characteristics. A coupled waveguide of an embodiment includes a waveguide configured to propagate electric waves and provided with a first opening window that radiates the electric waves to outside, a waveguide provided with a second opening window that absorbs electric waves from outside, configured to propagate the electric waves absorbed through the second opening window, and coupled to the waveguide such that the second opening window at least partially overlaps the first opening window, and an anisotropic conductive film covering the first opening window and the second opening window and bonding the waveguide and the waveguide.