Multilayer Ceramic Capacitor Interposer Layout for Orientation and Noise
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Solution Overview
Problem
Existing multilayer ceramic capacitors lack a method to identify their orientation when mounted on a board, which is necessary for specific applications and can lead to issues with acoustic noise and mounting stability.
Innovation Solution
The design includes interposers on both sides of the capacitor main body, with specific distance relationships (X2>X3 and X1>X4) that allow for orientation identification when mounted, and a unique shape and structure that enhances bending strength and reduces acoustic noise by using a protrusion and recess configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If interposers are added to identify orientation, then orientation identification is enabled, but device complexity increases
Solution Approach 1:
The interposers are positioned asymmetrically on the capacitor body with specific distance relationships (X1≠X2 and X3≠X4), creating an asymmetric structure that enables orientation identification. This asymmetric arrangement allows the capacitor to be distinguished between its four sides, solving the orientation identification problem without requiring additional complex marking systems.
Solution Approach 2:
The interposers serve as intermediary elements between the capacitor body and the mounting board. These interposers not only provide mechanical support and acoustic noise suppression but also function as orientation markers. By positioning the interposers at specific distances from the capacitor body sides, they mediate the orientation information transmission to the mounting board, enabling correct placement during assembly.
2Object-affected harmful factors
If interposers are added to suppress acoustic noise, then acoustic noise is reduced, but device complexity increases
Solution Approach 1:
The interposers perform multiple functions simultaneously: they suppress acoustic noise by providing mechanical support and damping, enable orientation identification through their asymmetric positioning, and maintain electrical insulation. By integrating these multiple functions into a single component system, the invention avoids the need for separate acoustic noise suppression elements, thereby limiting the increase in device complexity while achieving effective noise reduction.
3Loss of information
If specific distance relationships are defined for interposers, then orientation identification is improved, but manufacturing precision requirements increase
Solution Approach 1:
The invention specifies particular distance relationships (X1, X2, X3, X4) for the interposers relative to the capacitor body sides, creating local quality variations that encode orientation information. Rather than requiring uniform precision across the entire device, the critical precision is concentrated at the interposer positioning locations, allowing other areas to have more relaxed tolerances. This localized precision approach balances orientation identification needs with manufacturing feasibility.
Data Source
AI summary
A multilayer ceramic capacitor includes a capacitor main body, and two interposers on both sides in a length direction of a surface of the capacitor main body. When a distance between a side surface of one interposer on one side in the length direction, and a side surface of the capacitor main body is defined as X1, a distance between another side surface of the one interposer, and another side surface of the capacitor main body is defined as X4, a distance between a side surface of another interposer on another side in the length direction, and the side surface of the capacitor main body is defined as X2, and a distance between another side surface of the other interposer on the other side in the length direction, and the other side surface of the capacitor main body is defined as X3; X2>X3 and X1>X4 are satisfied.