Optical Socket Passive Alignment via Solder Surface Tension
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Solution Overview
Problem
Existing optical interfaces require time-consuming and costly manual or automated alignment processes to achieve precise alignment of optical sockets relative to optical devices, which is necessary for efficient optical signal communication, but these methods are inefficient and expensive.
Innovation Solution
The optical socket and PCB are configured such that solder attachment pads exert forces during the solder reflow process, automatically aligning the optical socket passively, utilizing surface tension to move the socket into alignment, thereby eliminating the need for manual or complex automated alignment processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual or automated alignment processes are used to align optical socket with optical devices, then alignment precision is improved, but assembly time and cost increase
Solution Approach 1:
The optical socket is designed with self-aligning features including alignment protrusions that automatically engage with alignment recesses on the PCB during assembly. The socket's own structure provides the alignment function without requiring external alignment equipment or manual intervention, thereby achieving high precision alignment while reducing assembly time and cost.
2Manufacturing precision
If manual or automated alignment processes are used to align optical socket with optical devices, then alignment precision is improved, but manufacturing cost increases
Solution Approach 1:
The alignment function is integrated into the optical socket structure itself through alignment protrusions and recesses. This eliminates the need for expensive external alignment equipment, specialized tooling, or highly skilled manual alignment operations, thereby reducing manufacturing cost while maintaining high alignment precision.
Solution Approach 2:
The alignment features (protrusions and recesses) are pre-formed during the socket manufacturing process. This preliminary preparation of alignment features ensures that when the socket is assembled to the PCB, alignment occurs automatically without requiring additional alignment operations, reducing both cost and complexity.
3Manufacturing precision
If traditional alignment methods are used, then alignment precision can be achieved, but process complexity increases
Solution Approach 1:
The optical socket structure itself provides the alignment function through integrated alignment protrusions and PCB recesses. This eliminates the need for complex external alignment equipment, multiple alignment steps, or sophisticated control systems, thereby simplifying the alignment process while maintaining high precision.
Solution Approach 2:
The alignment function is extracted from the assembly process and embedded directly into the socket structure. By taking the alignment function out of the process domain and putting it into the product design domain, the complexity of the alignment process is eliminated while precision is preserved through the mechanical geometry of the alignment features.
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 method allows for precise and efficient alignment of optical sockets during assembly, reducing assembly time and costs, enabling batch alignment of multiple sockets, and ensuring accurate optical coupling with high precision.
Implementation Method 1
utilizing surface tension to move the socket into alignment
Data Source
AI summary
An example method of manufacturing an optical interface. An optical socket may be provided that has an alignment feature that is to engage an optical connector, and first solder attachment pads. A printed circuit board may be provided that has an active optical device and second solder attachment pads. The optical socket may be connected to the printed circuit board by reflowing solder between the first and second solder attachment pads. The first and second solder attachment pads, the alignment feature, and the active optical device are positioned such that, while reflowing the solder, the solder automatically forces the optical socket into an aligned position.