Coil Component Anchor Structure for Stronger Bonding and More Turns
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Solution Overview
Problem
The existing coil components face challenges in achieving strong bonding between the body and the coil portion, as well as between the body and the lead-out portion, and in increasing the number of turns of the coil portion, which are essential for enhancing performance in miniaturized electronic devices.
Innovation Solution
The coil component design includes a body with a support substrate, a coil portion, a lead-out portion, and an anchor portion with via pads, where the lead-out portion is connected to the outermost turn of the coil and exposed on one surface of the body, and the anchor portion extends from the lead-out portion to the space between the coil portion and the body, improving bonding strength and allowing for additional turns by extending the coil patterns beyond the central thickness direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the coil portion is formed by conventional methods on a substrate, then the basic inductor function is achieved, but the bonding strength between the body and the coil portion is insufficient
Solution Approach 1:
The anchor portion is formed in advance within the body structure, creating a pre-established bonding interface. This preliminary action ensures that when the coil portion is formed, it has a strong anchoring point to bond to, thereby improving the bonding strength and reliability between the body and coil portion before final assembly.
Solution Approach 2:
The anchor portion acts as an intermediary element between the body and the coil portion. It provides a mediating bonding interface that enhances the connection strength, allowing for more reliable bonding than would be achieved through direct contact between the coil and body alone.
2Strength
If the coil portion is formed by conventional methods on a substrate, then the basic inductor function is achieved, but the bonding strength between the body and the lead-out portion is insufficient
Solution Approach 1:
The anchor portion is formed in advance within the body structure, creating a pre-established bonding interface. This preliminary action ensures that when the lead-out portion is formed, it has a strong anchoring point to bond to, thereby improving the bonding strength and reliability between the body and lead-out portion before final assembly.
Solution Approach 2:
The anchor portion acts as an intermediary element between the body and the lead-out portion. It provides a mediating bonding interface that enhances the connection strength, allowing for more reliable bonding than would be achieved through direct contact between the lead-out and body alone.
3Quantity of substance
If the coil portion is formed by conventional methods, then the basic inductor function is achieved, but the number of turns of the coil portion is limited
Solution Approach 1:
The coil portion extends in multiple spatial dimensions rather than being confined to a single plane. By utilizing three-dimensional space within the body, the design allows for increased number of turns without proportionally increasing the overall component footprint, effectively adding turns in another dimensional direction.
Solution Approach 2:
The coil portion is arranged in a nested or layered configuration where turns are positioned at different heights and locations within the body. This nesting approach allows multiple turns to be packed into a compact volume, increasing the number of turns without significantly increasing the external dimensions of the component.
Data Source
AI summary
A coil component includes a body having one end and the other end opposing each other, a support substrate disposed inside the body, a coil portion, disposed on at least one surface of the support substrate, in which an end portion of an outermost turn is disposed closer to the one surface of the body than to the other surface of the body, a lead-out portion connected to the outermost turn of the coil portion and exposed to the one surface of the body, and an anchor portion connected to the lead-out portions and including a via pad disposed between the lead-out portion and the coil portion inside the body.