Dielectric Waveguide Core for Chip Interconnect Alignment
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Solution Overview
Problem
Current chip-to-chip communication systems face limitations in data transmission rates and require precise alignment of optical or metal waveguides, which is challenging due to physical constraints and lossy waveguides, necessitating an improved interconnect solution.
Innovation Solution
The implementation of a circuit board with a microstrip line and a dielectric waveguide, where the microstrip line has varying widths to propagate specific wavelengths, and the dielectric waveguide has a core with a higher dielectric constant than its cladding, allowing for efficient radiation transmission and alignment within a transition region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If optical or metal waveguides are used for chip-to-chip communication, then data transmission capability is improved, but alignment precision requirements increase and transmission loss increases
Solution Approach 1:
The patent introduces a dielectric waveguide as an intermediary component between the IC and the transmission medium. This dielectric waveguide has a higher dielectric constant than the surrounding medium, creating a refractive index difference that confines and guides the electromagnetic radiation. The dielectric waveguide acts as a mediator that couples the IC's radiation to the transmission medium (optical fiber or metal waveguide) more effectively, reducing alignment sensitivity and transmission loss.
2Productivity
If metal waveguides are used for sub-millimeter waves, then transmission medium is provided, but transmission loss increases substantially limiting distance
Solution Approach 1:
The patent employs a composite structure consisting of a dielectric waveguide with specific dielectric properties coupled with metal waveguides or optical fibers. The dielectric waveguide portion reduces transmission loss by providing a lower-loss propagation path for sub-millimeter waves, while the metal waveguide or optical fiber provides structural support and long-distance transmission capability. This composite approach leverages the advantages of both materials to achieve low-loss, long-distance transmission.
3Manufacturing precision
If precision machining or exotic micro-optical structures are used for alignment, then alignment accuracy is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The dielectric waveguide structure is designed to self-align with the IC's radiation source through its higher dielectric constant, which creates a natural coupling mechanism. The waveguide's dimensions and dielectric properties are chosen to automatically match the radiation characteristics of the IC, eliminating the need for complex precision machining or exotic micro-optical structures. The system essentially aligns itself through the physics of electromagnetic wave propagation in dielectric media.
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 configuration enhances data transmission efficiency by allowing for precise alignment and reduced loss, enabling higher data rates and longer transmission distances without the need for exotic micro-optical structures or precision machining.
Implementation Method 1
a dielectric waveguide that is secured to the circuit board, wherein the dielectric waveguide includes a core that overlies at least a portion of the first ground plane and extends into the transition region
Implementation Method 2
the dielectric waveguide has a core with a higher dielectric constant than its cladding
Implementation Method 3
the microstrip line has: a first portion that overlays at least a portion of the second ground plane and that is separated from the second ground plane by a first distance, wherein the first portion of the microstrip line is dimensioned to have an impedance to propagate radiation having a wavelength
Data Source
AI summary
An apparatus is provided. There is a circuit assembly with a package substrate and an integrated circuit (IC). The package substrate has a microstrip line, and the IC is secured to the package substrate and is electrically coupled to the microstrip line. A circuit board is also secured to the package substrate. A dielectric waveguide is secured to the circuit board. The dielectric waveguide has a dielectric core that extends into a transition region located between the dielectric waveguide and the microstrip line, and the microstrip line is configured to form a communication link with the dielectric waveguide.