Wettable Flank Component Manufacturing With Insulating-Conductive Layers
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Solution Overview
Problem
Existing processes for manufacturing electronic components with wettable flanks lack efficiency and reliability, particularly in ensuring proper soldering and visual inspection of connection quality, especially in critical applications like automotive and medical fields.
Innovation Solution
A method involving the deposition of an insulating material layer in cavities and a conductive material layer on top to form wettable flanks, with additional steps including trench formation, thinning, and separation of components to enhance accessibility and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection metallizations are extended to component flanks to enable wettable flank design, then visual inspection of soldering quality is improved, but manufacturing complexity increases due to additional deposition steps
Solution Approach 1:
The patent segments the flank structure into two distinct layers: an insulating material layer deposited first in the cavities, and a conductive material layer deposited subsequently on top. This segmentation allows each layer to perform its specific function - the insulating layer provides electrical isolation while the conductive layer enables soldering and visual inspection, thereby resolving the contradiction between improved reliability and manufacturing complexity
Solution Approach 2:
The insulating material layer is deposited in advance before the conductive material layer. This preliminary action ensures that the flanks are electrically isolated prior to adding the conductive solderable layer, preventing potential electrical shorts while enabling subsequent soldering operations and visual inspection, thus addressing both reliability and processability concerns
2Reliability
If insulating material layer is deposited in cavities before conductive material, then electrical insulation is improved, but manufacturing time increases due to multiple deposition steps
Solution Approach 1:
The patent merges the insulation function and the soldering/flank formation function into a single integrated structure by depositing both insulating and conductive material layers during the same packaging process. This combination eliminates the need for separate insulation and conductive layer formation steps, thereby maintaining electrical insulation reliability while reducing overall manufacturing cycle time
Solution Approach 2:
The patent uses composite material structure where insulating material (such as epoxy or phenolic resin) and conductive material (such as silver, copper, or carbon black particles dispersed in resin) are combined in a layered configuration. This composite approach allows both electrical insulation and electrical conductivity to coexist in the same component structure, resolving the contradiction between insulation reliability and manufacturing efficiency
3Reliability
If conductive material layer is deposited on insulating material layer, then wettable flank formation is improved, but material cost increases
Solution Approach 1:
The conductive material layer is applied locally only on the outer surface of the insulating material layer that forms the component flanks, rather than throughout the entire cavity structure. This localized application ensures wettable flank formation where needed for soldering and visual inspection, while minimizing the quantity of expensive conductive materials such as silver, copper, or carbon black particles required, thus resolving the contradiction between reliability and material cost
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 improves the manufacturing process by enabling efficient formation of wettable flanks, ensuring reliable soldering, and facilitating visual inspection of connection quality, thus enhancing the reliability of electronic components in critical applications.
Implementation Method 1
an insulating material layer is deposited in the cavities
Implementation Method 2
a conductive material layer is deposited on the insulating material layer
Implementation Method 3
the connecting metallizations (also known as electrical contacts) are soldered or brazed to corresponding metal tracks or elements on the PCB side
Implementation Method 4
Some of the soldering material then rises to the sides of the components, enabling visual inspection of connection quality
Data Source
AI summary
A process is provided for manufacturing electronic components with wettable flanks from a substrate in which chips are formed, the chips being separated by cavities, the process including a first step in which an insulating material layer is deposited and then a second step in which a conductive material layer is deposited on the insulating material layer to form wettable flanks. An electronic component with wettable flanks is also provided.