Electronic Component Plate-like Leg Peel Stress Distribution
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Solution Overview
Problem
Conventional electronic components with externally exposed type contact terminals face challenges in achieving sufficient peel strength at solder joint sections due to residual stress and load direction, leading to peeling issues during substrate attachment.
Innovation Solution
The electronic component incorporates a terminal holding unit and a metallic shell with plate-like legs that extend outward from the side surfaces, featuring a soldering surface shape with a base section and orthogonal extending sections to effectively distribute and block peel stress, enhancing the attachment strength to the substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If externally exposed type contact terminals are provided adjacent to the metallic shell, then electrical connection capability is improved, but peel strength at solder joint sections deteriorates due to load transmission in the insertion direction
Solution Approach 1:
The soldering surface shape changes from a simple linear extension to a two-dimensional configuration with base section and orthogonal extending section. This dimensional change in the soldering surface geometry allows it to effectively block peel stress transmission while maintaining electrical connection capability through the contact terminals.
Solution Approach 2:
The soldering surface is segmented into distinct functional sections: a base section extending along the extending direction and orthogonal extending sections extending perpendicular to the base section. This segmentation allows different parts of the soldering surface to perform different functions - the base section provides structural support while the orthogonal sections block peel stress transmission.
2Ease of manufacture
If conventional hanging plates with simple soldering surfaces are used, then manufacturing simplicity is maintained, but sufficient peel strength cannot be achieved under vertical load conditions
Solution Approach 1:
The soldering surface transitions from a one-dimensional linear extension to a two-dimensional configuration with both longitudinal (base section) and transverse (orthogonal extending section) components. This additional dimension provides enhanced resistance to peel stress while remaining compatible with conventional manufacturing processes.
3Reliability
If only residual stress treatment through slits is performed, then thermal expansion influence is reduced, but peel strength reinforcement at solder joint sections is insufficient
Solution Approach 1:
The soldering surface is divided into functional segments - the base section and orthogonal extending sections - that work together to block peel stress transmission. This segmentation provides structural reinforcement at the solder joint sections while maintaining the residual stress management benefits of the overall metallic shell design.
Solution Approach 2:
By adding the orthogonal extending sections perpendicular to the base section, the soldering surface gains enhanced dimensional complexity that provides additional pathways to block peel stress transmission, complementing the residual stress treatment already achieved through the metallic shell structure.
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 significantly improves the peel strength and durability of the electronic component by blocking peel stress transmission and reducing the likelihood of peeling, even under vertical load conditions, thereby ensuring long-term reliability and endurance.
Implementation Method 1
the plate-like leg includes an extended end section having a soldering surface shape including a base section that extends along an extending direction, an orthogonal extending section that extends from a side edge of the base section along the insertion direction of the insertion opening being orthogonal to the base section
Data Source
AI summary
An electronic component including a terminal holding unit which holds a plurality of terminals, a metallic shell which houses the terminal holding unit inside thereof, the metallic shell including an insulation opening where a connection object which connects with the terminals is inserted and contact terminals which are adjacent to the metallic shell, each of the contact terminals including a contact plane which faces an insertion direction of the connection object into the metallic shell. A plate-like leg for fixating the metallic shell to a substrate is formed at each of side surfaces of the metallic shell.