Offset Mounting Tail Layout for DDR5 Through-Hole Connectors
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Solution Overview
Problem
Existing electrical connectors with through-hole technology cannot meet the signal integrity performance requirements of DDR5 standards, and those using surface mount technology have higher manufacturing costs, leading to poor market competitiveness.
Innovation Solution
The design incorporates a lead assembly with alternately arranged first-type and second-type conductive elements, where the through-hole mounting tails of the second-type conductive elements are offset in opposite directions, increasing the distance between them and providing more routing space, while maintaining mechanical robustness and reducing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If through-hole technology is used for electrical connectors, then manufacturing cost is reduced, but signal integrity performance cannot meet DDR5 standards
Solution Approach 1:
The patent applies different structural characteristics to different parts of the conductive elements. The mounting tails have offset arrangements to reduce crosstalk and improve signal integrity, while the contact portions maintain traditional structures for compatibility. This local differentiation allows through-hole technology to meet DDR5 signal integrity requirements.
Solution Approach 2:
The mounting tails of adjacent conductive elements are arranged asymmetrically with offsets in opposite directions. This asymmetric arrangement increases spacing between adjacent tails, reducing electromagnetic coupling and crosstalk, thereby improving signal integrity while maintaining cost-effective through-hole manufacturing.
2Device complexity
If conventional uniform mounting tail arrangement is used, then device complexity is reduced, but crosstalk increases and routing space is limited
Solution Approach 1:
The mounting tails are arranged with asymmetric offsets where adjacent tails alternate directions. This simple asymmetric pattern effectively increases spacing and reduces crosstalk without requiring complex structural modifications or additional components.
3Manufacturing precision
If standard mounting tail spacing is used, then manufacturing precision requirements are reduced, but routing space is insufficient for high-speed signals
Solution Approach 1:
The patent utilizes the lateral dimension by offsetting mounting tails in opposite directions perpendicular to the signal flow direction. This dimensional approach effectively increases routing space and spacing between adjacent elements without extending the overall connector length or width.
Data Source
AI summary
A connector for use with high-speed signals. The connector has conductive elements aligned in a longitudinal direction. Each conductive element comprises a mating contact portion, a mounting tail opposite the mating contact portion, and an intermediate portion joining the mating contact portion and the mounting tail. The mounting tail comprises a connecting portion extending from the intermediate portion, a mounting end opposite the connecting portion, and a main portion joining the connecting portion and the mounting end. The mounting end has a diminishing longitudinal width in a mounting direction. The main portion has a longitudinal width narrower than the connecting portion. The connecting portions of adjacent conductive elements extend toward opposite direction such that the corresponding mounting tails are offset from each other. Such a configuration enables the mounting tails to be inserted into through-holes in the printed circuit board with high error tolerance.