Monolithic Ceramic Capacitor Metal Terminals Vibration Noise
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Solution Overview
Problem
Monolithic ceramic capacitors attached to substrates generate vibration noise due to mechanical strain from alternating voltage, which existing configurations fail to adequately mitigate despite using metal terminals to absorb deformation.
Innovation Solution
The electronic component features metal terminals with a specific length-to-thickness ratio (6.4≦h/t≦10) to balance deformation absorption and fixing intensity, ensuring minimal vibration noise transmission to the substrate while maintaining sufficient attachment strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal terminals are used to connect the capacitor to the substrate, then the fixing intensity is improved, but the vibration noise is not sufficiently restricted
Solution Approach 1:
The patent applies parameter changes by optimizing the geometric dimensions of the metal terminals, specifically setting the length-to-thickness ratio (h/t) to 6.4 or more. This parameter adjustment transforms the terminal's mechanical properties to achieve both sufficient fixing intensity and effective vibration noise restriction through controlled elastic deformation.
2Object-generated harmful factors
If the length of leg portions is increased to absorb deformation, then the vibration noise is reduced, but the fixing intensity decreases
Solution Approach 1:
The patent resolves this contradiction by establishing an optimal parameter range for the length-to-thickness ratio (h/t ≥ 6.4) of the metal terminals. This parameter change enables the terminals to exhibit appropriate elastic deformation for vibration absorption while maintaining sufficient structural integrity for reliable fixing to the substrate.
3Strength
If the thickness of leg portions is increased to improve fixing intensity, then the attachment strength is improved, but the vibration noise restriction is reduced
Solution Approach 1:
The patent addresses this contradiction through parameter changes by controlling the thickness dimension of the metal terminals relative to their length. By maintaining the length-to-thickness ratio (h/t) of 6.4 or more, the terminals achieve optimal balance between attachment strength and vibration noise restriction capability.
4Quantity of substance
If the ceramic layers are made with high dielectric constant material, then the electrostatic capacity is improved, but the mechanical strain and vibration are increased
Solution Approach 1:
The patent introduces metal terminals as an intermediary element between the ceramic capacitor body and the substrate. These terminals absorb the mechanical strain generated by high dielectric constant ceramic layers through elastic deformation, preventing the strain from being transmitted to the substrate and causing vibration noise, while allowing the capacitor to maintain high electrostatic capacity.
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 configuration effectively suppresses substrate vibration noise by up to 40% compared to capacitors without metal terminals, while maintaining sufficient fixing intensity between the terminals and the substrate.
Implementation Method 1
elastic deformation of the metal terminals 8 can absorb the mechanical strain, which is generated at the ceramic layers when the alternating voltage is applied
Implementation Method 2
the ferroelectric material has piezoelectricity and electrostriction. If an alternating voltage is applied to the monolithic ceramic capacitor 1, a mechanical strain is generated at the ceramic layers 2
Implementation Method 3
the ferroelectric material has piezoelectricity and electrostriction. If an alternating voltage is applied to the monolithic ceramic capacitor 1, a mechanical strain is generated at the ceramic layers 2
Data Source
AI summary
An electronic component includes an electronic component body. The electronic component body includes a base member including two opposed end surfaces, and two outer electrodes respectively disposed on at least the two opposed end surfaces of the base member. Two connection portions of two metal terminals are respectively connected to the two outer electrodes. A relationship of 6.4≦ h/t is satisfied where h is a length of each of two leg portions of the two metal terminals and t is a thickness of each of the two leg portions of the two metal terminals.