Hold Down Member for On Board Transceiver Assembly
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Solution Overview
Problem
Existing transceiver assemblies face challenges in reliably attaching the on-board transceiver to the substrate, particularly in ensuring secure and stable electrical communication while accommodating thermal expansion and preventing relative rotation between the interposer and substrate.
Innovation Solution
The solution involves an on-board transceiver assembly that includes a substrate with conductive traces, an interposer with mating and mounting ends, and a hold-down member secured by fasteners, which captures the transceiver and interposer between the hold-down members and fasteners, providing a retention force and aligning components to ensure secure attachment and prevent relative rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transceiver is mounted directly to the substrate or using an interposer, then the transceiver can be attached to the substrate, but the attachment reliability is insufficient and relative rotation between components can occur
Solution Approach 1:
The hold down member acts as an intermediary component between the fastener and the transceiver/interposer assembly. It provides a dedicated mounting interface on the substrate and a capturing interface for the fastener, thereby mediating the connection and improving attachment reliability while preventing relative rotation through proper mechanical engagement.
2Strength
If conventional mounting methods are used, then the transceiver can be attached to the substrate, but the fasteners may experience backward migration and the attachment may not resist thermal expansion forces
Solution Approach 1:
The hold down member is pre-configured with a fastener engagement feature that applies preliminary counteracting force against potential backward migration of fasteners. The member's geometry and mounting configuration create preliminary mechanical constraints that resist thermal expansion forces before they can cause detachment or migration issues.
Data Source
AI summary
A hold down member can be surface mounted to a substrate, such that a post of the hold down member extends at least into an interposer. Accordingly, when an on board transceiver is placed in electrical communication with the interposer, a fastener can be inserted at least into the on board transceiver so as to attach to the post, thereby securing the on board transceiver to the interposer and the substrate.