Solder Connection Surface Layout for Excess Solder Buffering
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Solution Overview
Problem
In electronic applications, precise metering of solder material is challenging due to manufacturing fluctuations and tolerances, leading to potential quality issues such as malfunction or short circuits from excess solder, which complicates achieving a compact structure.
Innovation Solution
A connecting arrangement with solder connection surfaces designed to have a larger first cohesive projection sub-area for initial wetting and smaller further projection sub-areas as buffers to control solder layer thickness, allowing excess solder to be locally collected, ensuring a defined solder layer thickness and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a little more solder than necessary is provided to ensure quality, then reliability of soldered joint is improved, but device compactness deteriorates due to excess solder and larger safety distances
Solution Approach 1:
The solder connection surface is segmented into different regions with different structure sizes: a first region with larger structure size that forms the functional solder connection, and a second region with smaller structure size that collects excess solder. This segmentation allows the system to accommodate variable solder quantities while maintaining both reliability and compactness.
Solution Approach 2:
Different regions of the solder connection surface are given different local qualities through varying structure sizes. The first region has larger structures optimized for reliable solder connection, while the second region has smaller structures optimized for excess solder collection. This local differentiation resolves the contradiction by allowing each region to serve its specific function.
2Volume of moving object
If solder quantity is precisely metered to achieve compact structure, then device compactness is improved, but manufacturing precision deteriorates due to process fluctuations and tolerances
Solution Approach 1:
The design incorporates a buffer region (second region with smaller structures) that beforehand accommodates excess solder material. This cushioning approach compensates for manufacturing variations and tolerances, allowing precise metering for compactness while the buffer absorbs any overfilling that would otherwise compromise reliability.
Solution Approach 2:
The invention changes the structural parameter of the solder connection surface by creating regions with different structure sizes. This parameter differentiation creates functional zones that can handle a range of solder quantities, effectively decoupling the precision of solder metering from the final connection quality.
3Reliability
If larger safety distances are maintained to prevent short circuits from excess solder, then reliability is improved, but device compactness deteriorates
Solution Approach 1:
The harmful effect of excess solder is extracted and contained within the second region of the solder connection surface. By providing a dedicated collection zone for excess solder material, the design eliminates the need for larger safety distances to adjacent components, as the excess solder is confined to a controlled area that cannot cause short circuits.
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 ensures reliable formation of a functional solder connection region while locally managing excess solder, compensating for manufacturing fluctuations and maintaining electrical and mechanical functionality, thus enabling a more compact design.
Implementation Method 1
a structure size that is decisive for the wetting of the solder connection surface parts by the solder material in the molten state is designed to be larger in the first cohesive projection sub-area than in the one or more further projection sub-areas
Implementation Method 2
A dependence of the radii of curvature and the liquid pressure in the solder material is shown in the conventional Young-Laplace equation. What is desired now is a first cohesive projection sub-area whose structure size turns out to be larger in comparison to the one or to each of the further adjoined projection sub-areas. A large structure results in an energetically more favorable, large radius of curvature in the region of the respective solder connection surface part
Data Source
AI summary
A connecting arrangement. The connecting arrangement includes at least a first connecting partner and a second connecting partner, which are connected integrally together using a solidified solder layer, arranged between the connecting partners, with a solder layer thickness. Each connecting partner has a solder connection surface, which are wettable by the solder material in a molten state. The solder connection surfaces are arranged one above the other and face one another so that both are each contacted at least regionally by the solidified solder layer. Each solder connection surface is configured such that a perpendicular projection of both solder connection surfaces onto one another has at least one definable projection area with mutually overlapping solder connection surface parts. The definable projection area has a peripherally closed edge with at least one contained first cohesive projection sub-area, which is directly adjoined by at least one or more further projection sub-areas.