LGA Connector Extending Portion Impedance Match
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Solution Overview
Problem
Conventional Land Grid Array (LGA) type electrical connectors face difficulties in achieving impedance match during high-frequency signal transmission, leading to high-frequency resonance and noise, which hinders the performance of transmitting high-frequency signals.
Innovation Solution
The electrical connector features conductive terminals with an extending portion formed by bending and extending from the base portion, increasing self-capacitance and reducing impedance, while being located below the strip connecting portion to prevent deformation and optimize space usage, facilitating impedance match between the terminal, chip module, and circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional conductive terminal structure is used, then the structure is simple, but the impedance cannot be matched during high-frequency signal transmission, causing resonance and noise
Solution Approach 1:
The conductive terminal is divided into multiple functional segments: base portion, elastic arm, conducting portion, and extending portion. Each segment serves a specific function, allowing independent optimization of impedance characteristics while maintaining overall structural integrity.
Solution Approach 2:
The extending portion is positioned in the vertical dimension below the base portion, extending downward rather than horizontally. This dimensional arrangement increases self-capacitance and adjusts impedance without interfering with horizontal space occupation or contacting the accommodating slot walls.
2Reliability
If the extending portion is added to increase self-capacitance, then impedance is reduced and impedance match is improved, but the terminal structure becomes more complex
Solution Approach 1:
The extending portion is integrated with the base portion as a single continuous metal component, forming an unified conductive structure. This merging approach increases self-capacitance and improves impedance match without requiring additional separate components or assembly steps.
3Stability of the object's composition
If the extending portion contacts the accommodating slot, then the terminal is constrained, but the extending portion deforms due to touching the body
Solution Approach 1:
The extending portion is strategically positioned in the vertical space below the base portion where it does not contact the accommodating slot walls. This local spatial arrangement provides constraint stability through vertical positioning while avoiding deformation by preventing contact with the body structure.
4Productivity
If the extending portion is positioned below the strip connecting portion, then space is fully utilized and impedance is optimized, but the design becomes more complex
Solution Approach 1:
The extending portion utilizes the vertical dimension by extending downward below the base portion, effectively using previously unused space. This dimensional approach optimizes space utilization and impedance characteristics without requiring additional horizontal space or complex lateral arrangements.
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
The solution effectively reduces impedance and improves high-frequency performance by enhancing impedance match and utilizing space efficiently, allowing for better transmission of high-frequency signals without interference or deformation.
Implementation Method 1
The extending portion is formed by bending and extending the base portion to increase the self-capacitance of the conductive terminal, thereby reducing the impedance of the conductive terminal
Data Source
AI summary
An electrical connector for electrically connecting a chip module to a circuit board includes a body, having multiple accommodating slots, and multiple conductive terminals, correspondingly accommodated in the accommodating slots. Each conductive terminal includes: a base portion; an elastic arm, formed by extending upward from the base portion and used for abutting the chip module; a strip connecting portion, formed by extending upward from the base portion and used for being connected to a strip; an extending portion, formed by bending and extending from one side of the base portion, where the extending portion is located below the strip connecting portion and does not interfere with the accommodating slot; and a conducting portion, used for being electrically connected to the circuit board.