DDR Memory Slot Pin Layout for Lower Signal Crosstalk
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Solution Overview
Problem
Existing chip slot designs suffer from significant signal crosstalk due to the arrangement of signal and ground pins, which affects the signal integrity and transmission efficiency in DDR memory systems.
Innovation Solution
The proposed chip slot design features a unique arrangement of bending pins on metal sheets, where the bending pins of adjacent terminal groups are alternately arranged, increasing the spacing between pins and improving electrical isolation, thereby reducing signal crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If signal pins and ground pins are arranged in a staggering manner in the memory module, then anti-crosstalk effect is improved, but signal crosstalk is increased due to consecutive signal pins arranged together in the memory slot
Solution Approach 1:
The patent applies asymmetry by making bending pins of adjacent terminal groups extend in opposite directions (first direction vs. second direction). This asymmetric arrangement increases spacing between bending pins of adjacent terminal groups, reducing signal crosstalk while maintaining a relatively simple overall structure without requiring complex pin arrangements.
2Ease of manufacture
If bending pins of adjacent terminal groups extend in the same direction, then manufacturing is simplified, but spacing between bending pins is reduced leading to increased signal crosstalk
Solution Approach 1:
The patent makes bending pins of adjacent terminal groups extend in opposite directions rather than the same direction. This asymmetric arrangement increases the spacing between bending pins, reducing signal crosstalk while remaining manufacturable through standard PCB fabrication processes.
Solution Approach 2:
The patent utilizes the directional dimension by having bending pins extend in opposite directions (first direction and second direction) rather than varying spacing in a single dimension. This approach increases spacing between adjacent terminal groups while maintaining manufacturing simplicity.
3Device complexity
If consecutive signal pins are arranged together in the memory slot, then pin arrangement is simplified, but electrical isolation between signals is reduced
Solution Approach 1:
The patent applies asymmetry by making bending pins of adjacent terminal groups extend in opposite directions. This creates increased spacing and better electrical isolation between consecutive signal pins that are arranged together in the memory slot, improving reliability while keeping the pin arrangement relatively simple.
Data Source
AI summary
A chip slot is disclosed, which includes a slot, where a plurality of terminal groups are disposed in the slot, terminals in each terminal group include metal sheets that are symmetrically disposed on two opposite inner side walls of the slot, and each metal sheet has a bending pin that extends outside the slot; bending directions of bending pins on the terminals in each terminal group are same; and for any row of metal sheets in any two adjacent terminal groups, along an arrangement direction of the row of metal sheets, bending pins of the metal sheets in the adjacent terminal groups are alternately arranged on both sides of the row of metal sheets. The bending pins of the row of metal sheets are bent toward two different directions.