EMI Gasket with Engagement and Spring Tabs
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Solution Overview
Problem
Conductive foam gaskets used for EMI shielding are prone to tearing and do not maintain compliance with industry standards like SFF 8088 when conductive metallic gaskets are used, leading to inadequate EMI protection and potential EMI leakage around the connector area.
Innovation Solution
A conductive gasket with engagement tabs and spring tabs is designed to maintain a predefined separation distance between the gasket mating wall and the complementary faceplate, ensuring effective EMI shielding while remaining compliant with SFF 8088 standards, utilizing a conductive body with engagement tabs facing the faceplate and spring tabs facing the gasket mating wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conductive foam gaskets are used for EMI shielding, then EMI protection is provided, but the gaskets are prone to tearing and damage
Solution Approach 1:
The patent changes the material parameter from conductive foam to conductive metal (such as beryllium copper or phosphor bronze), fundamentally altering the mechanical and electrical properties to achieve both EMI shielding and durability
Solution Approach 2:
The gasket is constructed as a composite structure combining conductive metal material with specific geometric features (engagement tabs and spring tabs), creating a material system that exhibits both electrical conductivity for EMI shielding and mechanical resilience against tearing
2Reliability
If conductive metallic gaskets are used for EMI shielding, then gasket durability is improved, but compliance with SFF 8088 standards is compromised
Solution Approach 1:
The patent applies local quality by creating distinct regions with different functions: the body portion provides EMI shielding, while the engagement tabs and spring tabs are specifically designed to meet SFF 8088 mechanical interface requirements, allowing different parts of the same gasket to satisfy different standard requirements
Solution Approach 2:
The gasket is segmented into functional components (body, engagement tabs, spring tabs) where each segment serves a specific purpose: the body for EMI shielding and the tabs for mechanical compliance, enabling the single component to satisfy multiple competing requirements
3Object-affected harmful factors
If the cage opening is surrounded by conductive material for EMI shielding, then EMI protection is improved, but connector compliance with SFF 8088 standards is affected
Solution Approach 1:
The conductive gasket acts as a flexible shielding element that can be deformed during insertion to accommodate the connector, then returns to its original shape to maintain the EMI shield, providing both mechanical compliance and electrical shielding
Solution Approach 2:
The spring tabs provide dynamic behavior by deflecting during connector insertion and then returning to maintain a predefined separation distance, allowing the rigid conductive body to adapt to mechanical interface requirements while maintaining EMI shielding effectiveness
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 gasket provides enhanced EMI shielding and structural support, maintaining SFF 8088 compliance by effectively managing electromagnetic interference and ensuring reliable connector operation during high-speed data transfer.
Implementation Method 1
A plurality of spring tabs are disposed along the inner perimeter and extend away from the second face. When the first end of the EMI shielding cage is inserted into the opening of the conductive body... the engagement tabs and the spring tabs cooperatively maintain a predefined separation distance D1
Data Source
AI summary
A gasket for use with an electromagnetic interference (EMI) shielding cage for a connector includes a conductive body having an opening configured to receive a first end of the EMI shielding cage near a gasket mating wall incorporated on the EMI shielding cage. The conductive body has a first face designed to face away from the gasket mating wall, a second face designed to face the gasket mating wall, an inner perimeter and an outer perimeter. A plurality of engagement tabs are disposed along the outer perimeter and extend away from the first face. A plurality of spring tabs are disposed along the inner perimeter and extend away from the second face. When the first end of the EMI shielding cage is inserted into the opening of the conductive body and an opening of an optional complementary faceplate with the engagement tabs facing the faceplate and the spring tabs facing the gasket mating wall of the EMI shielding cage, the engagement tabs and the spring tabs cooperatively maintain a predefined separation distance D1 between the gasket mating wall and the optional complementary faceplate.