Optical Module Positioning Unit for Miniaturized Terminal Alignment
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Solution Overview
Problem
As digital coherent transceivers in large-capacity optical communication systems are miniaturized, there is an increasing need for high accuracy in determining the positions of electrode patterns on the housing and wiring board to ensure proper electrical connections.
Innovation Solution
The optical module incorporates a positioning unit, such as lead pins or metallized patterns, that determine the relative position of the wiring board with respect to the electrical terminal on the housing, allowing for accurate alignment and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the size of the optical module is reduced, then the miniaturization of the wiring pattern is improved, but the manufacturing precision required for electrode pattern positioning deteriorates
Solution Approach 1:
A positioning unit is introduced as an intermediary component between the housing and the wiring board. This positioning unit includes a positioning electrode pattern on the housing and a corresponding positioning electrode pattern on the wiring board, which serve as reference markers to establish accurate relative positioning. The positioning unit mediates the positioning relationship, allowing the main electrode patterns to be positioned with high accuracy even when the overall module size is reduced.
2Volume of moving object
If the size of the optical module is reduced, then the miniaturization of the wiring pattern is improved, but the reliability of electrical connection deteriorates
Solution Approach 1:
The positioning unit is configured in advance on both the housing and the wiring board before the actual electrical connection is established. The positioning electrode patterns are pre-positioned to define the correct relative alignment, ensuring that when the wiring board is connected to the housing, the main electrode patterns align accurately. This preliminary positioning action guarantees reliable electrical connections despite the miniaturized scale.
Data Source
AI summary
An optical module includes: an optical element; a housing configured to house the optical element; as electrical terminal arranged on an outer peripheral surface of the housing and electrically connected to an inside of the housing; and a positioning unit configured to determine a relative position of a wiring board electrically connected to the electrical terminal from outside of the housing, with respect to the electrical terminal.