Multilayer Coil Electrode Layout for Lower Stray Capacitance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing multilayer coil components face challenges in increasing the inner diameter of the coil while maintaining terminal electrode placement, leading to increased stray capacitance and deteriorated characteristics due to the embedding of terminal electrodes within the element body.
Innovation Solution
The multilayer coil component design includes terminal electrodes embedded within the element body, allowing them to fit within the outer shape without protruding, enabling an increase in coil diameter and reducing stray capacitance by ensuring overlap only when viewed from specific directions, thus improving the Q value and overall characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the terminal electrode is embedded in the element body, then the component size is reduced, but the inner diameter of the coil cannot be increased
Solution Approach 1:
The terminal electrode is configured to extend in multiple directions: along the stacking direction of insulator layers and along the winding direction of the coil. This multi-dimensional extension allows the electrode to reach the coil winding in the radial direction while maintaining embedding in the element body, thereby enabling increased coil inner diameter without increasing component size.
2Reliability
If the inner diameter of the coil is increased, then the Q value is improved, but the distance between the terminal electrode and the coil decreases, increasing stray capacitance
Solution Approach 1:
The terminal electrode has non-uniform cross-sectional area along its extension direction, with the cross-sectional area being larger at portions closer to the coil winding and smaller at portions farther away. This gradient structure allows the electrode to maintain close proximity to the coil for good electrical contact (improving Q value) while having a tapered form that reduces parasitic capacitance effects.
3Volume of moving object
If the terminal electrode is embedded in the element body, then the component size is reduced, but stray capacitance increases due to decreased distance between electrode and coil
Solution Approach 1:
The terminal electrode's cross-sectional area is varied along its length, creating a parameter gradient where the area decreases from the coil-facing end toward the opposite end. This parameter change optimizes the balance between maintaining small component size through embedding and reducing stray capacitance by having smaller electrode area near the coil winding.
Data Source
AI summary
A multilayer coil component 1 includes an element body 2, a coil 8, and a terminal electrode 4 and a terminal electrode 5. Each of the terminal electrode 4 and the terminal electrode 5 is disposed over at least the end surfaces 2a and 2b and a main surface 2d. Each of the terminal electrode 4 and the terminal electrode 5 and at least a part of the coil 8 overlap when viewed from the facing direction of the pair of side surfaces 2e and 2f. Each of the terminal electrode 4 and the terminal electrode 5 and the coil 8 do not overlap when viewed from the facing direction of the pair of end surfaces 2a and 2b.