Memory Module Connector Pin Shielding for Crosstalk Reduction
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Solution Overview
Problem
Current DDR4 memory module connectors experience signal-to-signal crosstalk due to closely placed connector pins, leading to reduced data transfer rates, with existing solutions like additional ground pins increasing cost and complexity.
Innovation Solution
The memory module connector is designed with signal and ground pins arranged in columns such that no two signal pins are adjacent, with ground pins positioned to shield signal pins, reducing crosstalk without altering the pin layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If connector pins are closely placed to increase data transfer capacity, then productivity is improved, but signal crosstalk increases reducing reliability
Solution Approach 1:
Ground pins are introduced as intermediary elements between signal pins to shield and isolate electrical signals. The ground pins act as mediators that prevent direct electromagnetic interference between adjacent signal pins, thereby maintaining signal integrity while allowing closely spaced pins for high data transfer capacity.
Solution Approach 2:
The connector pin array is segmented into alternating columns of signal pins and ground pins. This segmentation strategy separates signal-carrying pins from each other using ground pins as dividers, reducing electromagnetic coupling and crosstalk between signal lines while maintaining high pin density for increased data transfer capacity.
2Reliability
If additional ground pins are added to reduce crosstalk, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
Ground pins are strategically positioned only in specific columns between signal pin columns where electromagnetic interference is most problematic. This local application of ground shielding provides effective crosstalk reduction while avoiding the need to add ground pins throughout the entire connector, thereby limiting the increase in device complexity and cost.
3Area of stationary object
If connector pins are closely placed, then area is reduced, but signal crosstalk increases
Solution Approach 1:
The pin arrangement utilizes a two-dimensional grid structure with alternating columns of signal and ground pins. This dimensional arrangement allows signal pins to be closely spaced in one direction (along the row) while ground pins provide vertical shielding (in the column dimension), effectively reducing crosstalk without increasing the overall connector footprint.
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 configuration significantly reduces crosstalk, enabling higher data transfer rates in high-speed memory modules like DDR4 DIMMs without increasing costs or manufacturing complexity.
Implementation Method 1
ground pins positioned to shield signal pins, reducing crosstalk
Data Source
AI summary
A memory module connector (100) is described herein. The memory module connector (100) comprises a plurality of connector pins (102) distributed into a plurality of columns (104). The plurality of connector pins (102) further comprises a plurality of ground pins (106) for providing electrical ground to the memory module connector (100) and a plurality of signal pins (108) for carrying data signals across the memory module connector (100). Further, for each signal pin (108) provided in a column (104), each connector pin (102) adjacent to the signal pin (108) in an adjacent column (104) is a ground pin (106).