Z-Axis Compression Connector Layout for High-Speed Memory Routing
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Solution Overview
Problem
Existing information handling systems face challenges in achieving high-speed data processing and efficient memory channel routing due to congestion and increased PCB layer counts, particularly with traditional SODIMM connectors.
Innovation Solution
The implementation of a z-axis compression connector with a grid arrangement of high-speed signal contacts and signal return contacts, which allows for reversible and scalable memory module configurations, reducing signal trace crossings and congestion in the PCB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional SODIMM connectors are used, then memory modules can be installed, but signal trace crossings and PCB congestion increase
Solution Approach 1:
The patent transitions from traditional planar (2D) PCB routing to a z-axis vertical (3D) connector architecture. The compression connector establishes direct vertical electrical connections through the PCB thickness, eliminating the need for complex lateral signal trace crossings on the PCB surface. This dimensional change from 2D to 3D routing resolves the contradiction by maintaining ease of memory module installation while dramatically reducing PCB trace routing complexity and congestion.
2Productivity
If more signal contacts are added to increase memory channel capacity, then data processing speed improves, but PCB real estate and crosstalk increase
Solution Approach 1:
The compression connector utilizes the z-axis dimension to vertically stack multiple high-speed signal contacts and signal return contacts. This vertical arrangement allows numerous signal pairs to be packed into a compact footprint by exploiting the third dimension (depth), rather than spreading them out laterally across the PCB surface. Consequently, high data processing capacity is achieved without increasing PCB real estate or lateral trace congestion, and crosstalk is reduced due to improved signal return path coupling.
3Object-affected harmful factors
If signal return contacts are added between columns, then crosstalk is reduced, but connector complexity increases
Solution Approach 1:
The patent integrates signal return contacts directly into the grid structure between signal contact columns, merging the return path functionality with the existing signal contact arrangement. Rather than adding separate, distributed return paths, the design combines signal and return contacts into a unified vertical grid pattern. This merging approach reduces crosstalk by providing dedicated return paths for each signal column while avoiding the complexity of separate return routing structures.
Data Source
AI summary
A z-axis compression connector includes a plurality of high-speed signal contacts arranged in a grid of M rows by N columns, and a plurality of signal return contacts arranged between the N columns. A first signal return contact is positioned mid-way in line between a first signal contact and a second signal contact, where the first signal contact is in a first row and a first column and the second signal contact is in the first row and a second column adjacent to the first column.