Composite Electronic Component Resistor Height Differential
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Solution Overview
Problem
Existing composite electronic components face issues with defective joining between electronic elements due to the functional portion on the substrate-type electronic element coming into contact with other elements during mounting, leading to insufficient electrical connections.
Innovation Solution
A composite electronic component design featuring a resistance element with an insulating base portion, upper and lower surface conductors, and a resistor, where the resistor is positioned between the conductors and covered by a protective film, ensuring proper alignment and preventing contact with external electrodes, thus enhancing the joining process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a functional portion (resistor) is provided on the upper surface of the substrate-type electronic element, then the degree of freedom in circuit design is improved, but the risk of contact with other electronic elements during mounting increases, leading to defective joining
Solution Approach 1:
The patent applies dimensionality change by configuring the resistor with a height (in the vertical direction) that is smaller than the thickness of the external electrodes. This creates a height differential that prevents contact between the resistor and other electronic elements during mounting, while still allowing the functional portion to be integrated on the substrate surface for circuit design flexibility.
2Volume of moving object
If the functional portion is positioned closer to the external electrodes for compact design, then the device size is reduced, but the likelihood of contact during mounting increases, causing insufficient joining
Solution Approach 1:
The patent applies local quality by creating a specific height relationship between different components: the resistor has a smaller height than the external electrodes, while the upper surface conductor has a height equal to or greater than the external electrodes. This localized dimensional differentiation ensures that the functional portion (resistor) does not contact other elements during mounting, even when positioned close for compact design.
3Reliability
If the height of the resistor is increased to improve its functional performance, then the resistance characteristics are enhanced, but the risk of contact with external electrodes during mounting increases
Solution Approach 1:
The patent resolves this contradiction by establishing a vertical height relationship where the resistor's height is deliberately kept smaller than the external electrode thickness. This dimensional constraint in the vertical direction allows the resistor to maintain adequate functional performance while preventing harmful contact during the mounting process.
Data Source
AI summary
A composite electronic component includes an electronic element mounted on a resistance element in a height direction. The electronic element includes an electronic element body, and first and second external electrodes separated from each other in a length direction. The resistance element includes a base portion, a resistor disposed on an upper surface of the base portion, and first and second upper surface conductors on the upper surface of the base portion. The first and second upper surface conductors are separated from each other in the length direction, and the resistor is located between the first and second upper surface conductors. A dimension in the height direction of the resistor is smaller than both a dimension in the height direction of the first external electrode of a portion located on a lower surface of the electronic element body, and a dimension in the height direction of the second external electrode of a portion located on a lower surface of the electronic element body.