Active Socket Capacitive Coupling for Inter-Chip Alignment

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Solution Overview

Problem

Current inter-chip communication technologies face bottlenecks due to dense signal line packing on semiconductor chips, making it difficult to align chips for proximity communication and efficiently provide power and remove heat, leading to alignment and performance issues.

Innovation Solution

A system with an active substrate and integrated circuit chips that facilitate capacitive communication through overlapping signal pads, using a recessed cavity or posts for precise alignment and incorporating MEMS springs for mechanical alignment, and integrating power conversion and heat removal mechanisms close to the chips to enhance communication efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If signal lines are densely packed on semiconductor chips to increase integration density, then communication bandwidth is improved, but alignment precision between chips deteriorates

Engineering Contradiction:

Improvecommunication bandwidthVSAvoidalignment precision

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent introduces an active socket substrate as an intermediary component between chips. The substrate contains signal pads that capacitively couple with chip signal pads, enabling proximity communication without direct chip-to-chip contact. This mediator allows for relaxed alignment tolerances while maintaining high communication bandwidth through the capacitive coupling mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces direct mechanical contact between chips with capacitive coupling through the substrate. Instead of requiring precise mechanical alignment of chip signal lines, the system uses electric field coupling between overlapping signal pads on the substrate and chips, substituting mechanical precision requirements with electrical field overlap requirements that are more easily achieved.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Speed

If chips are aligned for proximity communication to eliminate propagation delays, then communication speed is improved, but device complexity increases

Engineering Contradiction:

Improvecommunication speedVSAvoidalignment complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The active socket substrate serves multiple functions simultaneously: it provides capacitive coupling for signal transmission, enables proximity communication between chips, offers a platform for integrating power conversion circuits and heat removal mechanisms, and simplifies the alignment process. This multi-functional approach achieves high communication speed while managing device complexity through consolidation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Use of energy by moving object

If power conversion and heat removal mechanisms are integrated close to chips, then power distribution efficiency is improved, but device complexity increases

Engineering Contradiction:

Improvepower distribution efficiencyVSAvoidsocket structure complexity

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

The patent merges power conversion circuits, heat removal mechanisms, and signal transmission functionality into a single integrated substrate structure. By combining these previously separate components into one unified active socket, the system achieves efficient power distribution and heat management near the chips while avoiding the complexity increase that would result from adding multiple separate components.

Inventive Principle:

Principle #5Merging (Combining)

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

This solution enables high-bandwidth, low-latency inter-chip communication by eliminating alignment errors and improving power distribution and heat management, achieving a hundred-fold improvement in communication density and bandwidth compared to traditional methods.

Implementation Method 1

capacitive signal pads on the active face of the integrated circuit chip overlap signal pads on the active face of the substrate. The arrangement of the substrate and integrated circuit chip facilitates communication between the integrated circuit chip and the substrate through capacitive coupling via the overlapping signal pads.

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Data Source

PatentUS8166644B2Method for manufacturing an active socket for facilitating proximity communication

Publication Date: 2012.05.01 ORACLE AMERICAN INC

AI summary

One embodiment of the present invention provides a system that facilitates capacitive communication between integrated circuit chips. The system includes a substrate having an active face upon which active circuitry and signal pads reside, and a back face opposite the active face. The system additionally includes an integrated circuit chip having an active face upon which active circuitry and signal pads reside, and a back face opposite the active face. Additionally, the integrated circuit chip is pressed against the substrate such that the active face of the integrated circuit chip is parallel to and adjacent to the active face of the substrate, and capacitive signal pads on the active face of the integrated circuit chip overlap signal pads on the active face of the substrate. The arrangement of the substrate and integrated circuit chip facilitates communication between the integrated circuit chip and the substrate through capacitive coupling via the overlapping signal pads.