Segmented Ceramic Identification Mark for Crack-Resistant Sintering
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Solution Overview
Problem
Existing ceramic multilayer inductors face issues with cracking in identification marks due to differences in sintering rates between marker layers and sheet layers during simultaneous firing.
Innovation Solution
A ceramic structure with a crack-resistant identification mark is achieved by incorporating multiple continuous sections and discontinuous sections in the identification mark, allowing for stress dispersion and preventing cracking during firing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If marker layers and sheet layers are simultaneously sintered, then production efficiency is improved, but the identification mark is prone to cracking due to different sintering rates
Solution Approach 1:
The identification mark is divided into multiple discrete segments along its length, with gaps between adjacent segments. This segmentation allows each segment to independently accommodate sintering shrinkage without generating excessive stress, thereby preventing cracks while enabling simultaneous sintering of the marker layer and sheet layers.
Solution Approach 2:
The identification mark structure is designed with different properties in different regions: the segmented portions have gaps that allow for stress relief, while the connecting portions maintain structural integrity. This local variation in structure enables the mark to withstand differential sintering rates without cracking.
2Ease of manufacture
If the identification mark is made with different composition from sheet layers, then identification visibility is improved, but sintering shrinkage rate difference causes cracking
Solution Approach 1:
By segmenting the identification mark into multiple sections with gaps between them, the structure can accommodate the different sintering shrinkage rates of the marker layer and sheet layers. The gaps act as stress relief zones that prevent crack propagation, allowing the use of different compositions for better visual identification.
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
The ceramic structure effectively prevents cracking in the identification mark, ensuring its integrity and functionality within ceramic laminates such as multilayer filters and inductors.
Implementation Method 1
the identification mark includes multiple continuous sections and a discontinuous section between the continuous sections... allowing for stress dispersion and preventing cracking during firing
Implementation Method 2
when the marker layers and the sheet layers are simultaneously sintered
Data Source
AI summary
A ceramic structure including a crack-resistant identification mark. A ceramic structure includes a first ceramic layer including a first main surface and a second main surface opposite to the first main surface; and an identification mark made of ceramics on the first main surface of the first ceramic layer, wherein in a cross section of the identification mark in a direction perpendicular to the first main surface, the identification mark includes multiple continuous sections and a discontinuous section between the continuous sections.