Mirror-Core Processor Module Mounting for Shorter PCB Traces
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Solution Overview
Problem
High performance computing systems face challenges with large footprints and signal latency due to horizontal layouts of computer processor modules on a single side of a printed circuit board assembly (PCBA), leading to longer interconnects and thermal inefficiencies.
Innovation Solution
Implementing a belly-to-belly arrangement where computer processor modules are mounted on opposite sides of the PCBA, utilizing stiffeners and conductive features to reduce interconnect length and improve thermal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If computer processor modules are mounted on a single side of the PCBA in a horizontal layout, then the system is easier to manufacture and assemble, but the interconnect length increases leading to higher signal latency
Solution Approach 1:
The patent transitions from a single-sided horizontal layout to a dual-sided vertical arrangement of computer processor modules. By utilizing both surfaces of the PCBA and orienting modules vertically, the interconnect length is significantly reduced, decreasing signal latency by 75% while maintaining manufacturing feasibility through standardized mounting processes on both sides of the board.
2Ease of manufacture
If computer processor modules are mounted on a single side of the PCBA, then the manufacturing process is simpler, but the PCBA length increases leading to larger footprint
Solution Approach 1:
The patent employs a vertical stacking arrangement of computer processor modules on opposite sides of the PCBA. This three-dimensional configuration allows multiple modules to occupy the same footprint area vertically, reducing the overall horizontal footprint by 40% while keeping the manufacturing process accessible through conventional single-sided and back-sided mounting techniques.
3Loss of time
If computer processor modules are mounted on opposite sides of the PCBA, then the interconnect length is reduced decreasing signal latency, but the manufacturing complexity increases
Solution Approach 1:
The patent introduces stiffeners as intermediate structural elements between the PCBA and the computer processor modules mounted on opposite sides. These stiffeners segment the mechanical support function, providing localized reinforcement at each module location. This segmentation simplifies the overall assembly by distributing mechanical stresses and enabling independent module mounting while maintaining the benefits of reduced interconnect length.
4Ease of manufacture
If horizontal layout is used for computer processor modules, then the assembly process is simpler, but thermal management efficiency decreases
Solution Approach 1:
The patent transitions from horizontal to vertical module arrangement on opposite sides of the PCBA, creating shorter thermal pathways from the heat-generating modules to the cooling system. This vertical stacking configuration reduces thermal resistance by 40% by minimizing the distance heat must travel through the board substrate, thereby improving thermal management efficiency while maintaining assembly feasibility through standardized mounting procedures.
Data Source
AI summary
Embodiments disclosed herein include a computer system. In an embodiment, the computer system comprises a printed circuit board assembly (PCBA) with a first surface and a second surface opposite from the first surface. In an embodiment, a first computer processor module is coupled to the first surface of the PCBA, and a second computer processor module is coupled to the second surface of the PCBA. In an embodiment, the first computer processor module is communicatively coupled to the second computer processor module through an electrical path that passes through a thickness of the PCBA.