Comb-Structured Electrical Interconnect for Impedance and Crosstalk
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Solution Overview
Problem
Electrical interconnects, such as pins, are susceptible to high crosstalk and voltage fluctuations due to their long length, leading to impedance issues and reduced performance in high-speed signal transmission and power delivery networks.
Innovation Solution
The implementation of a comb structure in electrical interconnects, which adds parallel capacitance to balance excessive inductance and tune impedance, forming a shielded electrical pathway to reduce unwanted crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the length of electrical interconnect is increased to connect components, then the connection range is improved, but impedance control deteriorates and crosstalk increases
Solution Approach 1:
The interconnect is segmented into multiple conductive layers (first conductive layer, second conductive layer, third conductive layer) separated by dielectric layers. This segmentation allows each layer to contribute differently to the overall electrical characteristics, enabling better impedance control across the extended length by distributing the electrical path through multiple controlled segments rather than a single continuous conductor.
2Length of stationary object
If the length of electrical interconnect is increased to connect components, then the connection range is improved, but crosstalk between adjacent interconnects increases
Solution Approach 1:
Dielectric layers are introduced as intermediary materials between adjacent conductive layers and between the conductive layers and surrounding structures. These dielectric intermediaries provide electrical isolation and reduce capacitive coupling between adjacent interconnects, thereby minimizing crosstalk while allowing the interconnects to maintain their extended length for broad connection range.
3Reliability
If conductive layers are added to tune impedance, then impedance control is improved, but device complexity increases
Solution Approach 1:
The multiple conductive layers serve multiple functions simultaneously: they provide the primary electrical conduction path, enable impedance tuning through their arrangement and dimensions, provide mechanical support and structural integrity, and facilitate heat dissipation. This multi-functionality allows impedance control to be achieved without proportionally increasing device complexity, as the same structural elements fulfill multiple roles.
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 effectively reduces impedance, minimizes far-end crosstalk, and improves power delivery network integrity by optimizing the L/R time impact on RC delay, resulting in lower knee frequencies and reduced voltage fluctuations.
Implementation Method 1
The implementation of a comb structure in electrical interconnects, which adds parallel capacitance to balance excessive inductance
Implementation Method 2
The implementation of a comb structure in electrical interconnects, which adds parallel capacitance to balance excessive inductance
Implementation Method 3
forming a shielded electrical pathway to reduce unwanted crosstalk
Data Source
AI summary
An apparatus comprising an interconnect comprising a conductive core; a first conductive layer connected to the conductive core and extending parallel to the conductive core towards a first end of the conductive core; a second conductive layer connected to the conductive core and extending parallel to the conductive core towards a second end of the conductive core; a first non-conductive layer between the conductive core and the first conductive layer; and a second non-conductive layer between the first conductive layer and the second conductive layer.