Multilayer Ceramic Capacitor Asymmetric Side Gap for Interposer Mounting
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Solution Overview
Problem
Conventional multilayer ceramic capacitors face challenges in accurately distinguishing between different surfaces during interposer mounting, leading to potential misalignment and increased transmission of vibration-induced acoustic noise.
Innovation Solution
The design includes a multilayer ceramic capacitor with specific surface features such as side gap portions and external electrodes, allowing for precise visualization of internal electrode layers, enabling accurate interposer placement on intended surfaces and reducing vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an interposer is provided to suppress vibration transmission, then acoustic noise is reduced, but it becomes difficult to distinguish between different surfaces for correct interposer mounting
Solution Approach 1:
The patent applies different visual characteristics (color, pattern, or appearance) to different surfaces of the capacitor body, specifically making the first and second side surfaces have different visual appearances from the first and second end surfaces. This allows operators to easily distinguish which surface should receive the interposer mounting, solving the surface identification problem while maintaining the vibration suppression function.
Solution Approach 2:
The patent introduces asymmetry in the visual appearance of capacitor surfaces through the side gap portions. By making the first side surface different from the second side surface in visual characteristics, the design breaks the symmetry that would otherwise make surface identification difficult, enabling correct interposer placement.
2Volume of moving object
If the capacitor body is made compact, then size is reduced, but surface differentiation becomes more difficult
Solution Approach 1:
The patent uses visual differentiation through color or pattern variations on different surfaces to maintain surface distinguishability even in compact designs. This allows the capacitor to be small while still providing clear visual cues for correct interposer mounting orientation.
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
This design facilitates correct interposer mounting and reduces acoustic noise by allowing for clear surface differentiation and effective absorption of piezoelectric vibrations through a flexible conductive resin layer.
Implementation Method 1
since the dielectric layers have piezoelectric and electrostrictive properties, stress and mechanical strain occur when an electric field is applied. Such stress and mechanical strain cause vibration
Implementation Method 2
a flexible conductive resin layer... effective absorption of piezoelectric vibrations
Data Source
AI summary
A multilayer ceramic capacitor includes a multilayer main body including an inner layer portion including dielectric layers and internal electrode layers alternately stacked, and outer layer portions on both sides of the inner layer portion in a stacking direction, two external electrodes at two end surfaces of the multilayer body in which side gap portions are provided on both sides of the multilayer main body in the width direction, and an interposer on any of the main surfaces, the side surfaces, and the end surfaces of a capacitor main body including the multilayer and the external electrodes. The difference in location between ends at side surfaces of two adjacent internal electrode layers in the stacking direction is about 0.5 μm or less. In the two side gap portions, a portion in contact with the multilayer main body has a thickness of about 10 μm or less.