Thin Carrier Circuit with Projecting Fastening Elements for Microwave Stability
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Solution Overview
Problem
Substrate-based circuits used in microwave technology face challenges with mechanical stability, particularly at higher frequencies, where the carrier substrate can easily crack due to thinness and high-frequency requirements, and additional electronic components are not always necessary for signal processing tasks like filtering.
Innovation Solution
A method for manufacturing a substrate-based circuit with enhanced mechanical stability involves attaching fastening elements to the carrier substrate, which project beyond its outer region, allowing for rigid clamping within a hollow conductor, and using specific materials and layer structures to ensure low loss and good thermal contact, along with precise soldering processes to maintain stability and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the carrier substrate is made thin to reduce losses for high-frequency signals, then the electrical performance is improved, but the mechanical stability deteriorates and cracking becomes probable
Solution Approach 1:
The patent divides the carrier substrate into multiple thin layers (first carrier layer, second carrier layer, third carrier layer) with intermediate layers between them. This segmentation allows each layer to be thin enough for low signal loss while the combined structure provides mechanical stability, preventing cracking that would occur in a single thin substrate.
2Strength
If reinforcement elements are added to prevent cracking, then the mechanical stability is improved, but the device complexity increases and additional components are required
Solution Approach 1:
The patent merges the mechanical reinforcement function with the signal transmission function by making the intermediate layers conductive. These intermediate layers serve dual purposes: providing mechanical support to prevent cracking and serving as conductor lines for signal processing, thereby eliminating the need for separate reinforcement elements and reducing device complexity.
3Loss of energy
If the carrier substrate is made thin for better electrical properties, then the signal propagation is improved, but the precision of component positioning deteriorates
Solution Approach 1:
The multi-layer structure provides multiple reference planes and conductor lines that facilitate precise component positioning. Each layer can be independently patterned and aligned, allowing for accurate placement of semiconductor components while maintaining thin overall thickness for low signal loss.
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
The method provides a mechanically stable substrate-based circuit that can withstand stress without cracking, allowing for precise soldering and accurate positioning of components, and enables efficient propagation of microwave signals within a hollow conductor, ensuring optimal performance across the terahertz range.
Implementation Method 1
at least one fastening element (20) is attached to an outer region of the carrier substrate (2) by deposition, wherein the at least one fastening element (20) projects beyond the outer region of the carrier substrate (2)
Implementation Method 2
a bond layer (5) is applied to the carrier substrate (2). Subsequently, a contact layer (6) is applied to the bond layer (5)
Data Source
AI summary
A substrate-based circuit (31) provides a carrier substrate (2), wherein a bond layer (5) is embodied on at least one part of the carrier substrate (2), and wherein a contact layer (6) which forms at least one conductor line (7) and/or at least one antenna element (8) is embodied on at least one first part (51) of the bond layer (5). The carrier substrate (2) provides at least one fastening element (20), which is deposited at the outer region of the carrier substrate (2) and projects beyond the outer region of the carrier substrate (2).