Pressure-Mount Connector Contact Tail Geometry for Signal Integrity
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Solution Overview
Problem
Conventional pressure mount connectors for high-performance applications like DDR5 face a challenge where mechanical robustness and signal integrity are incompatible, leading to degradation of mechanical properties and reduced signal integrity over multiple mating cycles.
Innovation Solution
The design incorporates conductive elements with thinner contact tails and widened portions to adjust impedance, allowing for improved mechanical properties and signal integrity, featuring a housing with a mating face, slot, and mounting portion, where the contact tails are thinner and narrower than the intermediate portions, with extensions to enhance signal integrity and withstand normal forces without permanent deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional pressure mount connectors use thicker contact tails for mechanical robustness, then mechanical strength is improved, but signal integrity deteriorates due to impedance mismatch
Solution Approach 1:
The contact tail is designed with non-uniform thickness, featuring a thinner section (0.15mm-0.25mm) for optimal signal transmission and a thicker section (0.30mm-0.50mm) for mechanical strength. This local variation in quality allows the same component to satisfy both signal integrity requirements and mechanical robustness requirements simultaneously.
Solution Approach 2:
The patent changes the thickness parameter of the contact tail along its length, transitioning from a uniform thickness design to a variable thickness design. The thickness varies between 0.15mm and 0.50mm at different positions, optimizing both electrical performance (signal integrity) and mechanical performance (robustness) by adjusting this critical geometric parameter.
2Strength
If conventional connectors use thicker contact tails, then mechanical robustness is improved, but manufacturing precision requirements increase to maintain signal integrity
Solution Approach 1:
Rather than requiring high precision throughout the entire contact tail thickness, the design accepts varying thicknesses (0.15mm-0.50mm) at different locations. The thinner section tolerates less precision variation while the thicker section provides mechanical buffer, reducing overall manufacturing precision requirements compared to a uniformly thick design.
Solution Approach 2:
The contact tail is effectively segmented into functional zones: a thinner signal-critical section and a thicker mechanical-support section. This segmentation allows different precision levels to be applied to different segments, reducing the overall manufacturing precision burden while maintaining both signal integrity and mechanical robustness.
3Duration of action of stationary object
If conventional connectors are designed for high mechanical robustness, then durability over mating cycles is improved, but device complexity increases to maintain signal integrity
Solution Approach 1:
The variable thickness design of the contact tail achieves both mechanical robustness and signal integrity without adding complex external structures. The complexity is embedded within the simple geometric variation of the contact tail itself, maintaining structural simplicity while improving performance.
Solution Approach 2:
The design merges the functions of mechanical support and signal transmission into a single integrated contact tail structure with variable thickness. This eliminates the need for separate mechanical support elements and signal-conducting elements, reducing overall device complexity while achieving both durability and signal integrity.
Data Source
AI summary
A pressure mount connector that conforms to standard physical requirements while providing high performance at high speeds. The connector includes a housing holding conductive elements. The housing has a mating face, a slot extending through the mating face, and a mounting portion. Each conductive element has a mating portion curving into the slot, a contact tail opposite the mating portion, and an intermediate portion joining the mating portion and the contact tail. The contact tail extends in an angle to the intermediate portion, which can change when a normal force is exerted onto a contact surface of the contact tail. Connecting the mounting portion of the housing to a mounting component can provide the normal force. The contact tail is thinner and narrower than the intermediate portion and can have extensions, which reduces the risk of permanently deforming the contact tail by the normal force and improves signal integrity performance.