Multilayer Ceramic Substrate Electrode Segmentation for High-Frequency Reliability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing manufacturing methods for multilayer ceramic substrates require wider intervals between wiring and planar electrodes due to different conductive paste compositions, leading to poor linearity of planar electrodes and degradation of high-frequency characteristics.
Innovation Solution
Forming wiring and planar electrodes on the same ceramic layer with the central portion of the planar electrode having a different composition than the wiring electrode, and the edge portion having the same composition as the wiring electrode, with the edge portion being thicker and printed simultaneously with the wiring electrode, allowing for reduced spacing and improved linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different conductive pastes are used for wiring electrode and planar electrode, then the planar electrode can be prevented from detaching, but the interval between electrodes must be widened
Solution Approach 1:
The planar electrode is divided into two regions with different paste compositions: a first region using paste with additives for detachment prevention, and a second region using paste without additives for maintaining linearity. This segmentation allows each region to optimize for its specific function while reducing the overall interval requirement between electrodes.
Solution Approach 2:
Different regions of the planar electrode are assigned different material properties: the first region (where detachment prevention is critical) contains conductive paste with metallic oxide/ceramic particles, while the second region (where linearity is critical) uses conductive paste without such additives. This local differentiation resolves the contradiction between detachment prevention and interval reduction.
2Ease of manufacture
If multiple printing operations are performed, then different conductive pastes can be applied, but the manufacturing process complexity increases
Solution Approach 1:
The conductive paste containing metallic oxide or ceramic particles serves dual purposes: it acts as both the conductive material for the planar electrode and as an additive for preventing electrode detachment during firing. This merging of functions eliminates the need for separate additive materials and simplifies the printing process to a single operation.
3Reliability
If a large amount of additive is added to planar electrode, then detachment is prevented, but the linearity of edges deteriorates
Solution Approach 1:
The planar electrode is segmented into a first region with high additive content for detachment prevention and a second region with low or no additives for edge linearity. This spatial segmentation resolves the contradiction between preventing detachment and maintaining precise edge definition.
Solution Approach 2:
The additive concentration is optimized locally: the first region (typically the center or inner portions) contains metallic oxide/ceramic particles for mechanical strength and detachment prevention, while the second region (edge portions) excludes these particles to maintain sharp, linear edges. This local quality differentiation simultaneously achieves both objectives.
Data Source
AI summary
The electronic component of this invention includes a multilayer ceramic substrate 14 composed of a plurality of ceramic layers 12. A wiring electrode 16 and a planar electrode 18 are formed on a ceramic layer 12, which is an insulating layer. The planar electrode 18 is formed so as to be spaced apart from the wiring electrode 16 at the certain interval. An edge portion 22 is formed in a region of the planar electrode 18 adjacent to and spaced apart from the wiring electrode 16 at a certain interval. A central portion 20 is formed in a region of the planar electrode 18 other than the edge portion 22. At least the composition of the central portion 20 is different from the composition of the wiring electrode 16, and the composition of the edge portion 22 is the same as the composition of the wiring electrode 16.