Photonic Memory Interconnect Modules for Bandwidth Scaling
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Solution Overview
Problem
Conventional computing systems face limitations in scaling memory capacity and bandwidth due to parasitic impedance in electronic communication carriers, which restricts the positioning of memory chips near processors, and existing photonic solutions are costly to manufacture in large scales.
Innovation Solution
The development of photonic communication platforms using silicon photonics with shared photomasks to pattern photonic modules, enabling scalable memory capacity and bandwidth through optical communication immune to parasitic impedance, and utilizing standard semiconductor foundries for cost-effective manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electronic communication carriers are used to connect processors and memory chips, then electrical signals can be transmitted, but parasitic impedance limits the positioning of memory chips near processors and restricts scaling of memory capacity and bandwidth
Solution Approach 1:
The patent replaces electronic communication carriers with optical communication carriers (waveguides) to transmit data signals between processors and memory chips. This substitution eliminates parasitic impedance issues inherent in electrical connections, enabling memory chips to be positioned closer to processors and scaling memory capacity and bandwidth beyond conventional electronic limits.
2Reliability
If photonic solutions are implemented for optical communication, then memory bandwidth and capacity can be scaled beyond conventional limits, but manufacturing costs increase
Solution Approach 1:
The patent merges photonic communication modules with standard semiconductor substrates, integrating optical waveguides, processors, and memory chips onto a single substrate. This consolidation leverages existing semiconductor manufacturing infrastructure and shared photomasks, reducing the overall manufacturing cost of photonic solutions while maintaining the bandwidth scaling benefits.
Solution Approach 2:
The patent designs the photonic communication platform to be adaptable to various computer architectures, making the optical communication infrastructure universally applicable across different system configurations. This multi-functionality increases utilization efficiency and justifies the manufacturing investment through broader application scenarios.
3Ease of manufacture
If photonic modules are patterned with shared photomasks, then manufacturing costs are reduced and scalability is improved, but the complexity of integrating multiple photonic modules with optical distribution networks increases
Solution Approach 1:
The patent segments the photonic communication system into standardized modular units, each containing processors, memory chips, and optical waveguides patterned with shared photomasks. These modular photonic communication modules can be independently manufactured and then integrated into larger systems, reducing the complexity of managing the entire optical distribution network as a single complex entity.
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
The solution provides scalable memory bandwidth and capacity beyond conventional limits, adaptable to various computer architectures, and reduces manufacturing costs by leveraging shared photomasks and standard fabrication processes.
Implementation Method 1
a first optical waveguide optically coupling the optical distribution network to a first neighboring photonic module
Data Source
AI summary
Described herein are photonic communication platforms that can overcome the memory bottleneck problem, thereby enabling scaling of memory capacity and bandwidth well beyond what is possible with conventional computing systems. Some embodiments provide photonic communication platforms that involve use of photonic modules. Each photonic module includes programmable photonic circuits for placing the module in optical communication with other modules based on the needs of a particular application. The architecture developed by the inventors relies on the use of common photomask sets (or at least one common photomask) to fabricate multiple photonic modules in a single wafer. Photonic modules in multiple wafers can be linked together into a communication platform using optical or electronic means.