Photonic Memory Interconnect Platform Beyond Parasitic Impedance

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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 memory chips' placement and scalability, especially in data-intensive applications like deep learning and high-frequency trading.

Innovation Solution

Photonic communication platforms using optical waveguides and distribution networks that are immune to parasitic impedance, enabling flexible and scalable memory access by integrating photonic modules with common photomasks for cost-effective manufacturing and adaptable to various computer architectures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If electronic communication carriers are used to connect memory chips and processors, then electrical communication is achieved, but parasitic impedance limits memory capacity and bandwidth scaling

Engineering Contradiction:
Improvememory capacity and bandwidthVSAvoidparasitic impedance
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces electronic communication carriers with photonic communication carriers (light signals through optical waveguides). This substitution eliminates parasitic impedance effects that plague electronic systems, enabling memory chips to be placed farther from processors while maintaining high bandwidth and capacity. The optical interconnects transmit data as light signals through waveguide networks, fundamentally changing the communication medium from electrical to optical domain.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Speed

If memory chips are placed closer to processors to overcome parasitic impedance limits, then bandwidth is improved, but device complexity and manufacturing constraints are worsened

Engineering Contradiction:
Improvememory access speedVSAvoidsystem architecture complexity
Core Design Contradiction:
SpeedVSDevice complexity

Solution Approach 1:

The patent introduces a photonic intermediary layer (optical distribution network with waveguides) that adds a new dimensional approach to interconnect architecture. Instead of simply reducing physical distance between memory and processor, the system uses optical waveguides routed through a photonic network layer, enabling high-speed communication without direct proximity requirements. This dimensional shift from direct electrical connection to routed optical connection resolves the contradiction between speed and complexity.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Productivity

If conventional electronic interconnects are used, then manufacturing is simplified, but scalability for data-intensive applications is limited

Engineering Contradiction:
Improvedata processing productivityVSAvoidmanufacturing complexity
Core Design Contradiction:
ProductivityVSEase of manufacture

Solution Approach 1:

The patent creates a universal photonic communication platform that can serve multiple functions: connecting memory to processors, enabling data-intensive applications like deep learning and high-frequency trading, and providing scalable bandwidth. The optical distribution network with its waveguide infrastructure serves as a multi-functional backbone that can be configured for different application requirements, making the system universally applicable across various data-intensive workloads while maintaining manufacturing feasibility through standardized photonic module design.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 photonic communication platforms enhance memory capacity and bandwidth beyond conventional limits, supporting real-time data access and reducing manufacturing costs while being adaptable to different architectures.

Implementation Method 1

a first optical waveguide optically coupling the optical distribution network to a first neighboring photonic module

Methodology Applied
Scientific EffectOptical waveguide: Waveguide (optics)

Data Source

PatentUS20250284055A1Photonic communication platform
Publication Date: 2025.09.11 LIGHTMATTER INC
  • US20250284055A1 patent drawing
  • US20250284055A1 patent drawing
  • US20250284055A1 patent drawing

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.