Recessed Conductor Layers for DDR5 Crosstalk Reduction
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Solution Overview
Problem
DDR5 connector crosstalk performance is hindered by internal conductor layers in motherboards, leading to increased electric field intensity and interference among signal pins, which affects channel performance.
Innovation Solution
The implementation of recessed conductor layers in DDR5 DIMMs with dielectric material and structural support to reduce electric field reflection and crosstalk, using conductive materials like copper or bronze for rigidity, and optimizing layer arrangements to control impedance and minimize far-end crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If internal conductor layers are used in DDR5 connectors, then structural support and rigidity are improved, but electric field intensity increases causing increased crosstalk
Solution Approach 1:
The patent extracts the harmful internal conductor layers from the signal path by creating recessed regions where these conductors are removed or absent. This eliminates the source of electric field reflection and crosstalk while maintaining structural support through alternative means such as reinforced board structures or support layers positioned away from the signal path.
Solution Approach 2:
The patent introduces dielectric material as an intermediary substance to fill the recessed regions where conductor layers are removed. This dielectric material acts as a mediator that maintains the structural integrity and electrical insulation without generating harmful electric fields, thereby reducing crosstalk while preserving mechanical support.
2Object-generated harmful factors
If conductor layers are recessed with dielectric material, then crosstalk is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent segments the conductor layers into distinct regions - continuous conductor layers in non-recessed areas and recessed regions with dielectric material. This segmentation allows selective removal of conductor layers only where necessary to reduce crosstalk, while maintaining continuous conductivity paths in other areas, thereby simplifying the manufacturing process compared to complete layer removal.
Solution Approach 2:
The patent applies different structural qualities to different locations: recessed regions with dielectric material are created only in specific locations where crosstalk occurs, while other regions maintain traditional conductor layer structures. This localized approach reduces manufacturing complexity by limiting the modified structure to only where needed rather than changing the entire connector design.
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 approach reduces connector crosstalk and improves DDR5 channel performance by minimizing signal interference and maintaining signal integrity, as shown by impedance and cross-talk measurements with recessed and supported conductor layers.
Implementation Method 1
reduce electric field reflection and crosstalk
Implementation Method 2
interference among signal pins
Implementation Method 3
optimizing layer arrangements to control impedance
Data Source
AI summary
Examples described herein relate to a system that includes: a circuit board comprising a plurality of layers and at least one conductive connection. In some examples, the at least one conductive connection is connected to a layer of the plurality of layers. In some examples, at least one layer of the plurality of layers comprises a conductive material. In some examples, the at least two layers of the plurality of layers comprise conductive material that extend in an axis towards the at least one conductive connection but do not overlap with the at least one layer of the plurality of layers comprising the conductive material.