Capacitor Component With Pad Portions For Alignment
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Solution Overview
Problem
Current multilayer ceramic capacitors face limitations in increasing capacitance due to difficulties in developing high-permittivity materials and decreasing dielectric layer thickness, while also requiring reduced mounting area and height on circuit boards, which complicates electrical connectivity and reliability.
Innovation Solution
The capacitor component is designed with a stacked structure of unit laminates, including internal and connection electrodes, with pad portions between them to enhance electrical connectivity, where connection electrodes penetrate through the body and have distinct areas and axes, and are covered by a protective layer to improve alignment and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the thickness of the capacitor body is increased to improve capacitance, then the capacitance increases, but the alignment defects between connection electrodes worsen and electrical connectivity deteriorates
Solution Approach 1:
The patent introduces a pad portion as an intermediary element between the connection electrodes of different unit laminates. This pad portion serves as a mediator that compensates for alignment defects, ensuring reliable electrical connectivity even when the capacitor body thickness is increased. The pad portion is disposed between adjacent unit laminates and electrically connects the connection electrodes, thereby resolving the contradiction between increased capacitance (through greater thickness) and maintained electrical connectivity.
2Reliability
If the area of the connection electrode is increased to improve electrical connectivity, then the electrical connectivity improves, but the mounting area of the capacitor increases
Solution Approach 1:
The patent segments the electrical connection function into two distinct parts: the connection electrode (which remains compact) and the pad portion (which provides the expanded connection area). The connection electrode penetrates through the body with a limited area to maintain small mounting footprint, while the pad portion, disposed between unit laminates, provides the necessary area for reliable electrical connectivity. This segmentation allows the connection electrode area to remain small while still achieving good electrical connectivity through the enlarged pad portion.
3Quantity of substance
If the number of unit laminates is increased to improve capacitance, then the capacitance increases, but the alignment defects between connection electrodes worsen
Solution Approach 1:
The pad portion acts as a compensatory intermediary that absorbs alignment errors when multiple unit laminates are stacked. By providing a larger connection area with the pad portion disposed between unit laminates, the system can tolerate greater variations in alignment precision while maintaining reliable electrical connectivity. This allows the manufacturer to increase the number of unit laminates for higher capacitance without requiring progressively tighter alignment precision.
Data Source
AI summary
A capacitor component includes a plurality of unit laminates, each comprising a body with a stacked structure including a plurality of internal electrodes and connection electrodes that extend in a stacking direction of the body and electrically connect to the plurality of internal electrodes, and pad portions between adjacent unit laminates to electrically connect the respective connection electrodes of the unit laminates above and below the pad portions to each other.