Wireless Chip-to-Chip Communication via Absorption Layers

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Solution Overview

Problem

Conventional wireless chip-to-chip communication systems face interference issues due to electromagnetic radiation, which are not adequately addressed by metal housings, leading to manufacturing defects and increased costs.

Innovation Solution

A multi-layered structure with absorption layers forming a propagation medium having a specific dielectric constant, allowing direct wireless communication between chips via antennas within this medium, thereby containing and absorbing electromagnetic signals and reducing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If wireless communication is implemented between chips on a PWB, then communication flexibility and I/O efficiency are improved, but electromagnetic interference between chips increases

Engineering Contradiction:

ImproveI/O efficiencyVSAvoidelectromagnetic interference

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

A dedicated wireless communication substrate is introduced as an intermediary between transmitting and receiving chips. This separate substrate layer provides a controlled propagation medium for electromagnetic signals, isolating them from other chips and reducing interference while enabling efficient wireless communication.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The PWB structure is segmented into functional layers: a dedicated wireless communication substrate layer for signal propagation, chip mounting layers for device placement, and isolation structures. This segmentation separates communication functions from computation functions, reducing electromagnetic interference between different chip operations.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If metal housing is used to shield electromagnetic radiation, then external interference is reduced, but device complexity and manufacturing cost increase

Engineering Contradiction:

Improveexternal interferenceVSAvoidshielding structure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The shielding function is extracted from the traditional metal housing and integrated directly into the PWB's wireless communication substrate layer. The substrate material itself provides electromagnetic isolation properties, eliminating the need for separate metal shielding structures while maintaining protection against external interference.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The electromagnetic properties of the PWB substrate are modified by selecting materials with specific dielectric constants and loss tangents optimized for wireless signal propagation and containment. This parameter optimization provides inherent shielding without requiring additional metal housing structures.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If traditional wire bus connections are used between chips and PWB, then manufacturing reliability is improved, but manufacturing defects in solder bonds increase

Engineering Contradiction:

Improveconnection reliabilityVSAvoidsolder bond defect rate

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

Physical wire bus connections and solder bonds are replaced with wireless electromagnetic signal transmission through the PWB substrate. This substitution eliminates mechanical joining processes that are prone to manufacturing defects, achieving reliable connections without soldering operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 approach reduces external interference, decreases the need for metal casings, simplifies chip connections, lowers fabrication costs, and enhances I/O efficiency by using absorption layers to contain and propagate wireless signals within a controlled medium.

Implementation Method 1

first and second absorption layers included within the multi-layered structure, the first and second absorption layers forming a propagation medium having a given dielectric constant

Methodology Applied

Scientific EffectElectromagnetic absorption: Absorption (EM radiation)

Implementation Method 2

forming a propagation medium having a given dielectric constant

Methodology Applied

Scientific EffectDielectric property: Dielectric

Data Source

PatentUS7873122B2Methods and devices for wireless chip-to-chip communications

Publication Date: 2011.01.18 QUALCOMM INC

AI summary

Wireless chip-to-chip communications are methods and devices are disclosed. In an example, a wireless chip-to-chip communication device includes a plurality of chips, each of the plurality of chips having at least one antenna and formed on a multi-layered structure. The multi-layered structure includes first and second absorption layers. The first and second absorption layers are configured to enclose a propagation medium having a given dielectric constant. The plurality of chips are configured to wirelessly communicate with each other via the respective antennas in accordance with a given wireless communication protocol via a direct propagation path within the propagation medium.