LGA Connector Shielding via Segmented Grounding Contacts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LGA connectors fail to provide effective shielding against electromagnetic interference due to the positioning of shielding members, which do not cover the entire contact area and disconnect from the IC package and substrate, affecting the shielding effect.
Innovation Solution
An electrical connector design featuring an insulating housing with signal and grounding contacts, a shielding member, and connecting members that surround the contacts, ensuring comprehensive shielding by linking the grounding contacts' spring arm and tail portions with the shielding member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shielding members are positioned between the upper end and lower end of contacts, then the shielding member can be contained within the insulating housing, but the shielding member cannot shield the entire contact area and disconnects from the IC package and substrate
Solution Approach 1:
The grounding contact is divided into multiple segments: body portion, spring arm with contact portion, and tail portion. The connecting member is also segmented to connect different parts. This segmentation allows each component to perform its specific function - the contact portion contacts the IC package, the tail portion contacts the substrate, and the connecting member links them all to the shielding member, achieving complete shielding while maintaining structural manageability
Solution Approach 2:
The solution transitions from a two-dimensional planar arrangement to a three-dimensional spatial configuration. The grounding contact and connecting members extend in multiple dimensions - upward to contact the IC package, downward to contact the substrate, and laterally to connect the shielding member. This multi-dimensional arrangement enables comprehensive shielding coverage while maintaining connectivity throughout the assembly
2Reliability
If the contacts extend beyond the insulating housing ends, then the contacts can connect with IC package and substrate, but the shielding member cannot cover the entire contact length
Solution Approach 1:
The connecting member serves as an intermediary element that bridges the gap between the grounding contact's tail portion and the shielding member. It extends the shielding connection to the full length of the contact, including portions that extend beyond the insulating housing. This intermediary component enables the shielding member to effectively cover the entire contact area while maintaining connection reliability at both ends
3Stability of the object's composition
If shielding member is contained within insulating housing, then housing structure is maintained, but shielding member disconnects from IC package and substrate
Solution Approach 1:
The grounding contact performs multiple functions: it provides electrical connection to the IC package through its contact portion, connects to the substrate through its tail portion, and links to the shielding member to provide shielding. The connecting member similarly serves multiple functions by joining these components. This multi-functionality allows the housing structure to remain intact while achieving comprehensive shielding connectivity throughout the assembly
Data Source
AI summary
An electrical connector (100) comprises an insulating housing (1) with a plurality of signal contacts (31) and a plurality of grounding contacts (30) received therein, a shielding member (2) and a connecting member (4) set in the insulating housing (1), the shielding member (2) locates around the signal contacts (31), each of the grounding contacts (30) includes a body portion (300), a spring arm (301) extending upwardly from the body portion (300) and a tail portion (302) extending downwardly from the body portion (300), the spring arm (301) includes a contact portion (3010) at the end thereof, the connecting member (4) connects the contact portion (3010) and the tail portion (302) with the shielding member (2).