Coil Component Lead-Out Segmentation for Dicing Reliability
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Solution Overview
Problem
The existing coil electronic components face issues with adhesion strength between lead-out portions and the body, leading to metal being pushed to the surface during the dicing process, which affects the reliability and connection of the components.
Innovation Solution
The coil electronic component design includes lead-out portions with spaced portions separated by slits and groove portions, which reduce the volume of metal in edge regions and enhance adhesion strength by distributing the external force, preventing metal from being pushed during dicing and improving connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lead-out portion is formed as a continuous metal structure, then the electrical connection is good, but the adhesion strength decreases and metal is pushed to the surface during dicing
Solution Approach 1:
The lead-out portion is divided into multiple segments by introducing slits, creating spaced portions that are separated from each other. This segmentation prevents metal from being pushed to the surface during dicing while maintaining electrical connectivity through the spaced portions, thereby improving adhesion strength without significantly increasing overall structural complexity
Solution Approach 2:
The slit is positioned specifically in the edge region of the lead-out portion where metal pushing occurs during dicing. This local modification targets the problematic area while preserving the continuous metal structure in other regions, maintaining good electrical connection while preventing metal displacement at the critical edge region
2Reliability
If the metal volume in edge regions is reduced, then metal pushing is prevented, but the electrical connection strength may decrease
Solution Approach 1:
By segmenting the lead-out portion through slits, the metal volume in the edge region is effectively reduced without creating a complete discontinuity. The spaced portions maintain sufficient metal presence for electrical connection while preventing the excessive metal volume that causes pushing during dicing
Solution Approach 2:
The slit acts as an intermediary structure that reduces metal volume in the edge region while maintaining electrical connectivity. It provides a controlled discontinuity that prevents metal pushing but allows current flow through the spaced portions, balancing metal volume reduction with connection reliability
Data Source
AI summary
A coil electronic component includes a body having a first surface and a second surface, opposing each other, and a third surface connecting the first surface and the second surface to each other, an insulating substrate disposed inside the body, a coil portion disposed on the insulating substrate, a first lead-out portion extending from one end portion of the coil portion and having a first spaced portion and a second spaced portion separate from each other by a first slit, whereby the first and second spaced portions are respectively exposed to the first surface and the third surface of the body, and a second lead-out portion extending from the other end portion of the coil portion and having a third spaced portion and a fourth spaced portion separate from each other by a second slit, whereby the third and fourth spaced portions are respectively exposed to the second surface and a third surface of the body.