Multilayer Ceramic Capacitor Alpha Beta Via Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multilayer ceramic capacitors face challenges in achieving low equivalent series inductance (ESL) while maintaining high capacitance, particularly due to issues with via formation that can lead to short-circuits and increased ESL.
Innovation Solution
A multilayer ceramic capacitor design featuring alpha and beta vias with different diameters, where the alpha via is larger than the beta via, and connection electrodes are formed to minimize the loop area and prevent short-circuits, allowing for reduced ESL.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If vias are formed to connect internal electrodes, then capacitance is improved, but equivalent series inductance increases and short-circuits may occur
Solution Approach 1:
The via connection structure is segmented into two distinct types: alpha vias with larger diameters and beta vias with smaller diameters. This segmentation allows different via types to serve different functions - alpha vias provide robust electrical connection while beta vias minimize loop area, thereby resolving the contradiction between achieving high capacitance and maintaining low ESL
Solution Approach 2:
Different regions of the capacitor utilize different via diameters according to their specific functional requirements. Alpha vias are positioned where larger connection area is beneficial for capacitance, while beta vias are positioned where smaller loop area is critical for reducing ESL,实现ing local optimization of electrical properties
2Quantity of substance
If via diameter is increased to improve connection, then capacitance is improved, but short-circuit risk increases
Solution Approach 1:
The connection structure is divided into alpha vias with larger diameters for capacitance enhancement and beta vias with smaller diameters for short-circuit prevention. This segmentation allows the system to simultaneously enjoy the benefits of large via diameter (improved capacitance) while avoiding its drawbacks (increased short-circuit risk) through the complementary small-diameter beta vias
Solution Approach 2:
The via connection system functions as a composite structure combining two different via types with different diameter characteristics. This composite approach allows the larger alpha vias to provide good electrical connection for capacitance while the smaller beta vias provide safety against short-circuits, achieving a balanced solution
Data Source
AI summary
A multilayer ceramic capacitor includes: a capacitance layer including dielectric layers and first and second internal electrodes disposed with respective dielectric layers interposed therebetween; a protection layer disposed on one surface of the capacitance layer; an alpha connection electrode provided in an alpha via penetrating through the protection layer; and a beta connection electrode provided in a beta via penetrating through the capacitance layer and connected to the alpha via. The alpha via has a diameter greater than that of the beta via.