Composite Electronic Component Lateral Inductor-Capacitor Layout
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Solution Overview
Problem
The miniaturization of electronic devices is hindered by the increased component layout area and noise generation due to the number of DC/DC converters and passive elements in power management integrated circuits (PMICs), and the placement of inductors and capacitors can lead to parasitic capacitance and degradation of the quality factor.
Innovation Solution
A composite electronic component is designed with a capacitor and inductor combined using a ceramic body and magnetic body, respectively, where the capacitor is attached to the side of the inductor, minimizing the influence of magnetic flux and optimizing the placement to reduce noise and component area, while maintaining the quality factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an inductor and capacitor are disposed up and down to reduce component layout area, then the component mounting area is reduced, but magnetic flux from the inductor affects internal electrodes of the capacitor generating parasitic capacitance and shifting self-resonant frequency toward low frequency
Solution Approach 1:
The patent transitions from vertical stacking (up-down arrangement) to lateral arrangement (side-by-side placement) of the capacitor and inductor. This dimensional change in component layout eliminates magnetic flux interference between components while maintaining compact form factor, thus reducing parasitic capacitance effects and preserving self-resonant frequency characteristics.
2Area of stationary object
If the size of composite electronic component is reduced, then the component mounting area is reduced, but the thickness of internal magnetic layers serving to prevent magnetic field of the inductor is reduced, resulting in degradation of quality factor
Solution Approach 1:
The patent extracts the magnetic shielding function from the internal magnetic layers and implements it through external magnetic shielding structures or optimized component placement. This allows the component size to be reduced while maintaining adequate magnetic field prevention through dedicated shielding elements rather than relying solely on thin internal magnetic layers.
3Adaptability or versatility
If various functions are provided in electronic devices to meet service requirements, then the functionality is enhanced, but the number of DC/DC converters and passive elements increases, leading to increased component layout area
Solution Approach 1:
The patent combines multiple passive elements (inductor and capacitor) into a single composite electronic component package. This merging approach maintains the required functionality for DC/DC conversion while significantly reducing the overall component layout area compared to using separate discrete components.
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 reduces the component mounting area, suppresses noise generation, and prevents degradation of the self-resonant frequency and quality factor, enhancing the performance and efficiency of the power management system.
Implementation Method 1
magnetic flux generated by the inductor may affect internal electrodes of the capacitor to generate parasitic capacitance
Data Source
AI summary
A composite electronic component may include: a composite body including a capacitor formed of a ceramic body in which a plurality of dielectric layers and first and second internal electrodes are laminated, and an inductor formed of a magnetic body including a coil; an input terminal disposed on a first end surface of the composite body; output terminals including a first output terminal disposed on a second end surface of the composite body and a second output terminal disposed on the second end surface of the composite body; and a ground terminal disposed on one or more of upper and lower surfaces and the first end surface of the capacitor of the composite body. The capacitor is adjacent to the inductor.