Microwave Unit Connecting Component for Automatic Assembly
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Solution Overview
Problem
Existing microwave packages face challenges in maintaining controlled signal and ground paths during assembly, leading to signal losses and frequency limitations, particularly in high-frequency applications, and require complex heat management and alignment with motherboards.
Innovation Solution
The use of a connecting component with a substrate wing means and solder mask to align and interconnect signal and ground paths between the motherboard and microwave package, allowing for automatic assembly and improved heat distribution, while adjusting the air gap and dielectric constant to ensure unbroken signal continuity and mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If traditional microwave packages are used with thickened copper slugs and cavity substrates, then signal and ground paths can be established, but automatic assembly in SMD machines becomes difficult and alignment precision deteriorates
Solution Approach 1:
The package structure is segmented into distinct functional layers: signal path layer with copper foil, ground path layer with separate ground elements, and insulating layers with via holes. This segmentation allows each layer to be optimized independently for automatic assembly while maintaining precise alignment of signal and ground paths through the via hole connections.
Solution Approach 2:
Via holes filled with conductive material serve as intermediaries connecting the signal path layer and ground path layer. These via holes provide precise alignment references that enable automatic SMD assembly machines to accurately position and connect signal and ground paths without requiring complex mechanical alignment procedures.
2Reliability
If complex package structures with multiple layers and via holes are implemented, then signal continuity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The package uses uniform insulating material layers with consistently spaced via holes throughout the structure. This homogeneous design simplifies manufacturing by allowing standardized production processes while maintaining reliable signal continuity through the repeated via hole patterns that connect signal and ground paths.
Solution Approach 2:
The package combines multiple materials with complementary properties: insulating substrate material providing structural support, copper foil providing conductive signal paths, and conductive filler material in via holes providing vertical connections. This composite structure achieves reliable signal continuity while managing the complexity through material specialization.
3Temperature
If copper sheets are extensively used for heat management, then heat dissipation improves, but manufacturing complexity and cost increase
Solution Approach 1:
The ground path layer and heat dissipation function are merged into a single structural element. The same ground copper traces and ground elements that provide electrical grounding also serve as thermal pathways to conduct heat away from the microwave component, eliminating the need for separate heat sink structures and simplifying manufacturing.
Solution Approach 2:
The copper foil and ground elements perform multiple functions simultaneously: providing electrical ground paths, serving as thermal conduction pathways for heat dissipation, and acting as mechanical support structures. This multi-functionality reduces the overall number of components needed and simplifies the manufacturing process.
Data Source
Figure 1
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Figure 3A~3B
AI summary
A microwave unit (10) comprising a motherboard (12) and a package (14) adapted to be assembled automatically in, e.g., a Surface Mounted Device, SMD, machine is disclosed. The microwave unit (10) preferably comprises a connecting component (16) interconnecting the motherboard (12) and the package (14), and operable to make the signal ways on a same level at both the motherboard (12) and at the package (14). Furthermore, the microwave unit (10) preferably comprises a micro-strip adapted soldering tag (18) for soldering on two sides (181, 182).