Multilayer Coil Component Stray Capacitance Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to reduce the size of multilayer coil components while maintaining reliability, as increasing the number of coil windings to achieve size reduction leads to a decrease in inter-conductor distance, potentially causing deformation and short circuits due to pressure applied during manufacturing.
Innovation Solution
The multilayer coil component design includes a configuration where connection conductors are positioned to avoid overlapping with coil conductors, ensuring they do not increase the volume, and are strategically placed between terminal electrodes and the coil's outer edge, reducing stray capacitance and maintaining reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the number of coil windings is increased to achieve size reduction, then the profile height is reduced, but the inter-conductor distance decreases leading to deformation and short circuit risks
Solution Approach 1:
The patent transitions the arrangement of connection conductors from a vertical stacking configuration (in the stacking direction of dielectric layers) to a horizontal planar configuration (in the plane parallel to the mounting surface). This dimensional change allows connection conductors to be positioned in the radial direction between the terminal electrode and coil outer edge, avoiding vertical overlap with coil conductors while maintaining electrical connectivity. The result is reduced profile height without increasing the volume occupied by conductor stacking, thereby preventing deformation and short circuits.
2Device complexity
If connection conductors are stacked with coil conductors to reduce the number of layers, then the manufacturing process is simplified, but the volume increases causing deformation under pressure
Solution Approach 1:
The patent repositions connection conductors from the vertical stacking direction to the horizontal plane, arranging them radially between the terminal electrode and coil outer edge. This planar arrangement eliminates vertical stacking between connection and coil conductors, reducing the volume occupied in the stacking direction while maintaining all necessary electrical connections. The manufacturing process remains feasible as conductors are still formed through standard multilayer ceramic techniques, just with a different spatial configuration.
3Volume of stationary object
If connection conductors are positioned inside the coil to minimize space usage, then the overall component size is reduced, but stray capacitance increases affecting performance
Solution Approach 1:
The patent positions connection conductors in a specific local region - the radial space between the terminal electrode and the outer edge of the coil - rather than uniformly inside the coil structure. This localized placement optimizes the balance between space utilization and electrical performance. By positioning connection conductors in this intermediate region, the design minimizes their proximity to the high-current coil conductors (reducing stray capacitance) while still achieving compact overall dimensions. The connection conductors are strategically placed where they can connect terminals to coil windings without excessive capacititive coupling.
Data Source
AI summary
A pair of terminal electrodes 4 and 5 have electrode parts 4a and 5a and electrode parts 4b and 5b when viewed from a stacking direction, respectively. A plurality of connection conductors are disposed at positions not overlapping a plurality of coil conductors when viewed from the stacking direction. At least two of the plurality of connection conductors are disposed in a first region A1 or a second region A2 between the terminal electrodes 4 and 5 and an outer edge 9a of a coil 9 when viewed from the stacking direction. The first region A1 and the second region A2 overlap the electrode parts 4a and 5a when viewed from the facing direction of a pair of end surfaces 2a and 2b and overlap the electrode parts 4b and 5b when viewed from the facing direction of a pair of main surfaces 2c and 2d.