Embedded Capacitor Electrode Segmentation for ESL and Short Circuit Prevention
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Solution Overview
Problem
Existing multilayer capacitors face issues with short circuits due to adjacent external electrodes connecting during mounting on a circuit substrate, and they struggle to achieve low Equivalent Series Inductance (ESL) properties, which affect high-frequency characteristics.
Innovation Solution
The design includes a laminated body with specific arrangements of dielectric layers, internal and external conductors, and extraction conductors to prevent short circuits and reduce ESL by ensuring no external electrodes with different potentials are adjacent, allowing for parallel signal paths that minimize inductive impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external electrodes are arranged adjacent to each other to reduce ESL, then low ESL properties are achieved, but short circuit may occur during mounting
Solution Approach 1:
The external electrodes are segmented into two distinct groups: a first group extending to the first end surface and a second group extending to the second end surface. This segmentation prevents adjacent electrodes with different potentials from being in direct contact, eliminating the short circuit risk while maintaining the low ESL configuration through optimized spatial distribution of the segmented electrode groups.
Solution Approach 2:
The electrode arrangement transitions from a planar adjacent configuration to a three-dimensional distributed configuration. The first external electrodes extend to the first end surface while the second external electrodes extend to the second end surface, utilizing the depth dimension of the laminated body to separate electrodes of different potentials and prevent short circuits.
2Reliability
If external electrodes are placed close together to minimize inductive impedance, then ESL is reduced, but the risk of solder connection causing short circuit increases
Solution Approach 1:
The external electrodes are divided into two spatially separated groups: the first external electrodes are positioned at the first end surface and the second external electrodes are positioned at the second end surface. This segmentation maintains short distances within each group for low ESL while ensuring adequate isolation between groups of different potentials to prevent solder-induced short circuits.
Solution Approach 2:
The laminated body structure itself acts as an intermediary barrier between the first and second external electrodes. The dielectric layers and internal conductor arrangement within the laminated body provide electrical isolation, allowing the external electrodes to be positioned close together for low ESL while preventing direct electrical contact that would cause short circuits.
3Reliability
If multiple external electrodes are provided on the same surface for low ESL, then parallel signal paths are created, but short circuit risk increases during mounting
Solution Approach 1:
The external electrodes are segmented into two distinct sets located on opposite end surfaces of the laminated body. The first external electrodes extend to the first end surface while the second external electrodes extend to the second end surface. This segmentation maintains the parallel signal path configuration for low ESL while preventing short circuits by separating electrodes of different potentials into different spatial zones.
Solution Approach 2:
The electrode configuration utilizes the depth dimension of the laminated body to distribute external electrodes across different end surfaces rather than concentrating them on the same surface. This three-dimensional arrangement creates parallel signal paths through the laminated body while maintaining electrical isolation between electrodes of different potentials.
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 effectively prevents short circuits and achieves lower ESL, enhancing high-frequency characteristics and resonance frequency, thereby improving the performance of the electronic component and substrate module.
Implementation Method 1
a first capacitor conductor (18) and a second capacitor conductor (19) which face each other with a predetermined distance therebetween in the laminated body (11)
Implementation Method 2
a plurality of dielectric layers (17) which are laminated
Data Source
AI summary
In an electronic component and a substrate module, a laminated body includes a first capacitor conductor and a second capacitor conductor embedded therein, which define a capacitor. First and second external electrodes are connected to the first capacitor conductor and the second capacitor conductor through extraction conductors, respectively. Third and fourth external electrodes are connected to the first capacitor conductor through extraction conductors. Fifth and sixth external electrodes are connected to the second capacitor conductor through extraction conductors. On a first side surface, no external electrode having an electrical potential different from the electrical potential of the third external electrode is provided between a first end surface and the third external electrode. On the first side surface, no external electrode having an electrical potential different from the electrical potential of the fifth external electrode is provided between a second end surface and the fifth external electrode.