Layered Transmission Line Layout for Quantum Signal Isolation
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Solution Overview
Problem
In processing devices such as quantum computers, poor isolation characteristics between transmission lines lead to performance deterioration due to electromagnetic induction and heat conduction, which affects signal propagation and overall device performance.
Innovation Solution
A transmission line configuration featuring a first and second structure with intermediate conductive layers, where the intermediate layer includes lines extending along specific directions to separate and shield the conductive lines, reducing electromagnetic induction and enhancing heat insulation by positioning conductive layers and lines in a manner that suppresses radiation and conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional transmission line configuration is used, then device complexity is low, but isolation characteristics between multiple wiring lines deteriorate due to electromagnetic induction and heat conduction
Solution Approach 1:
The transmission line is divided into multiple segments including first and second conductive layers, opposing conductive layers, and intermediate conductive layers. Each segment serves a specific function in signal transmission or shielding, allowing the system to achieve high isolation characteristics through structured segmentation while maintaining manageable complexity.
Solution Approach 2:
An intermediate conductive layer is introduced between the first and second conductive structures. This intermediate layer acts as a mediator that provides additional shielding against electromagnetic induction and heat conduction, thereby improving isolation characteristics without directly modifying the primary conductive paths.
2Area of stationary object
If conductive lines are positioned closer to reduce device area, then area is reduced, but electromagnetic interference and heat conduction between lines increase
Solution Approach 1:
The patent transitions from planar arrangement to three-dimensional layered configuration. Conductive lines are distributed across multiple layers (first conductive layer, second conductive layer, intermediate conductive layer) with vertical separation, allowing closer horizontal positioning while maintaining electromagnetic isolation through the intermediate shielding layers.
Solution Approach 2:
The intermediate conductive layer serves as a shielding mediator positioned between adjacent signal-carrying conductive layers. This intermediate structure blocks electromagnetic fields and heat conduction paths, enabling compact device layout without compromising isolation characteristics.
3Reliability
If shielding structures are added to improve isolation characteristics, then isolation characteristics improve, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The shielding function is segmented into multiple discrete conductive layers (first opposing conductive layer, second opposing conductive layer, intermediate conductive layer) that can be manufactured and positioned independently. This segmentation allows for modular manufacturing processes and simplifies the integration of shielding functions into the overall device fabrication.
Solution Approach 2:
The intermediate conductive layer serves multiple functions simultaneously: it provides electromagnetic shielding, acts as a thermal barrier, and can serve as a reference plane for signal integrity. This multi-functionality reduces the need for separate dedicated shielding structures, thereby simplifying manufacturing while maintaining high isolation characteristics.
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 achieves high isolation characteristics, reducing electromagnetic interference and heat conduction, thereby improving signal transmission efficiency and maintaining temperature differences between components, enhancing the overall performance of quantum computers and similar processing devices.
Implementation Method 1
poor isolation characteristics between multiple wiring lines lead to performance deterioration due to electromagnetic induction
Implementation Method 2
poor isolation characteristics between multiple wiring lines lead to performance deterioration due to electromagnetic induction and heat conduction
Data Source
AI summary
According to one embodiment, a transmission line includes a first structure, a second structure, and a first intermediate conductive layer. The first structure includes a first conductive layer, a first opposing conductive layer, and a first conductive line. The first conductive line extends along a first direction. The first direction crosses a second direction from the first conductive layer to the first opposing conductive layer. The second structure includes a second conductive layer, a second opposing conductive layer, and a second conductive line. The second conductive line extends along the first direction. The first intermediate conductive layer includes a first line extending along the first direction and a second line extending along the first direction. A third direction from the first line to the second line crosses a plane including the first direction and the second direction.