Multilayer Capacitor ESR Adjustment via Selective Electrode Connections
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multilayer capacitors face challenges in precisely adjusting equivalent series resistance (ESR) due to the increase in load current demands, as the number of lead conductors decreases ESR, contradicting the need for higher capacity and ESR.
Innovation Solution
The multilayer capacitor design includes alternately arranged first and second inner electrodes connected via through-hole conductors, with specific connections and positions of lead conductors to adjust the ESR, allowing for precise regulation by varying the number and position of these connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of lead conductors is increased to connect all inner electrodes to terminal electrodes, then the capacity of the multilayer capacitor is increased, but the equivalent series resistance decreases
Solution Approach 1:
The patent extracts only a subset of inner electrodes to be connected to terminal electrodes via lead conductors, rather than connecting all inner electrodes. This selective connection reduces the number of lead conductors, thereby increasing equivalent series resistance while maintaining sufficient capacity through the remaining connected electrodes.
Solution Approach 2:
The patent applies different connection configurations to different groups of inner electrodes. Some inner electrodes are connected to terminal electrodes through lead conductors, while others are connected through through-hole conductors only, creating local variations in electrical connection paths that optimize both capacity and equivalent series resistance.
2Reliability
If the thickness of the inner resistance layer is regulated and material composition is adjusted to increase equivalent series resistance, then the equivalent series resistance increases, but the manufacturing complexity increases
Solution Approach 1:
The patent removes the complex requirement of precisely regulating inner resistance layer thickness and material composition by extracting the equivalent series resistance control function to the electrical connection configuration. Instead of modifying material properties, the patent controls equivalent series resistance through the number and arrangement of lead conductors connecting inner electrodes to terminal electrodes.
Solution Approach 2:
The patent changes the control parameter for equivalent series resistance from material properties (thickness and composition of inner resistance layer) to structural parameters (number and position of lead conductors). This parameter substitution simplifies manufacturing while achieving the desired equivalent series resistance values.
Data Source
AI summary
A multilayer capacitor includes a multilayer body in which dielectric layers and inner electrodes are alternately laminated, and terminal electrodes formed on the multilayer body. The inner electrodes include first inner electrodes and second inner electrodes alternately arranged. The terminal electrodes include at least three terminal electrodes. The first inner electrodes are electrically connected to each other via a through-hole conductor. The second inner electrodes are electrically connected to each other via a through-hole conductor. At least two first inner electrodes in the first inner electrodes are electrically connected via a lead conductor to at least two respective terminal electrodes whose number is smaller than the total number of the terminal electrodes by at least 1 in the at least three terminal electrodes. At least one second inner electrode in the second inner electrodes is electrically connected via a lead conductor to the remainder of terminal electrodes other than the terminal electrodes electrically connected to the first inner electrodes via the lead conductor. An equivalent series resistance is set to a desirable value by adjusting the number of at least one species of the first and second inner electrodes electrically connected to the terminal electrodes via the lead conductors.