Conductive Terminal With Curved Inner Electrode for Solderless Chip Connection
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Solution Overview
Problem
Conventional electronic devices face difficulties in easily connecting chip components with metal terminals, which affects their durability and reliability, especially in applications requiring robustness and reliability.
Innovation Solution
A conductive terminal design featuring an inner electrode part, an opening edge electrode part, and a lateral electrode part, allowing for easy attachment and connection to chip components without the need for solder or other connection members, utilizing a curved part to maintain a pressure contact state and reduce stress on the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal terminals are used to protect chip components, then durability and reliability are improved, but the connection process becomes complex and difficult
Solution Approach 1:
The conductive terminal is divided into three distinct parts: an inner electrode part for inserting into the accommodation recess, an opening edge electrode part formed continuously along the opening edge surface, and a lateral electrode part formed continuously along the outer surface. This segmentation allows each part to perform its specific function independently while maintaining overall reliability and simplifying the connection process.
Solution Approach 2:
The inner electrode part acts as an intermediary element that connects the chip component's terminal electrode to the external circuit. By inserting the inner electrode part along the inner wall of the accommodation recess, it mediates the connection between the chip component and the opening edge electrode part, simplifying the overall connection process while ensuring reliable electrical contact.
2Reliability
If through holes are disposed on wall surfaces for terminal connection, then electrical connection is achieved, but the accommodation recess cannot be used as resin filling space
Solution Approach 1:
Instead of creating through holes in the wall surfaces (two-dimensional approach), the opening edge electrode part extends along the opening edge surface and the lateral electrode part extends along the outer surface in three-dimensional space. This dimensional change allows electrical connection to be achieved without compromising the accommodation recess's volume for resin filling.
Solution Approach 2:
The inner electrode part is nested within the accommodation recess, extending along the inner wall, while the opening edge electrode part and lateral electrode part extend outward. This nested configuration allows the terminal structure to be embedded within the case's three-dimensional space without requiring through holes, preserving the accommodation recess for resin filling.
3Reliability
If solder or connection members are used to connect terminal and electrode, then electrical connection is achieved, but thermal expansion differences cause cracks
Solution Approach 1:
The invention changes the connection method from mechanical-thermal (soldering) to mechanical pressure contact. The curved part's elasticity provides continuous pressure contact between the terminal and electrode, eliminating the need for solder that causes cracks due to thermal expansion differences. This parameter change in the connection mechanism resolves the harmful effect of thermal expansion cracks.
4Ease of manufacture
If curved part is formed in inner electrode part, then pressure contact connection is achieved without solder, but manufacturing precision requirements increase
Solution Approach 1:
The curved part is formed with a specific curvature radius that provides elastic flexibility. This flexible geometry allows the inner electrode part to maintain pressure contact with the terminal electrode while accommodating manufacturing tolerances. The elastic nature of the curved part compensates for minor dimensional variations, reducing the stringency of manufacturing precision requirements while enabling solderless connection.
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 enhances the durability and reliability of electronic devices by simplifying the connection process, reducing the risk of thermal expansion-related cracks, and allowing for compact and flexible mounting configurations.
Implementation Method 1
the inner electrode part includes: a base part having a flat plate shape and continuing to the opening edge electrode part; a curved part formed near a tip of the base part and protruding away from the lateral electrode part
Data Source
AI summary
A conductive terminal includes an inner electrode part, an opening edge electrode part, and a lateral electrode part. The inner electrode part is connectable to a terminal electrode of a chip component by being inserted along an inner wall of an accommodation recess of a case. The opening edge electrode part is formed continuously to the inner electrode part. The lateral electrode part is formed continuously to the opening edge electrode part along an outer surface of the case. The inner electrode part includes a base part, a curved part, and a continuous boundary part. The base part continues to the opening edge electrode part. The curved part is formed near a tip of the base part and protrudes away from the lateral electrode part. The continuous boundary part is formed between the base part and the curved part and continuously connects them.