Asymmetric DIMM Socket Latch for Pin-Safe Memory Release

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Solution Overview

Problem

The improper release of DIMMs from their sockets can cause mechanical damage to the socket's I/O pins due to uneven rotation, leading to potential short circuits and damage to the motherboard.

Innovation Solution

A DIMM socket design featuring latches where one side lacks a lever arm or push tab, forcing uneven force application during release, ensuring the DIMM rotates in a manner that prevents pin damage, and a seating floor that accommodates varying contact lengths to prevent rotation-induced issues.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a DIMM socket uses symmetric latches with lever arms on both sides, then the DIMM can be released evenly, but the user may inadvertently apply uneven force causing rotation and pin damage

Engineering Contradiction:

Improvepin integrityVSAvoidrelease operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies asymmetry by providing a lever arm feature on only one latch (first latch) while the other latch (second latch) lacks this feature. This asymmetric design forces the user to apply force in a specific manner that prevents uneven rotation during DIMM release, thereby protecting the pins from damage while maintaining ease of operation through the lever arm mechanism.

Inventive Principle:

Principle #4Asymmetry

2Adaptability or versatility

If the DIMM socket accommodates varying contact lengths, then different DIMM configurations are supported, but improper release can still cause rotation and mechanical damage

Engineering Contradiction:

Improvecontact length accommodationVSAvoidmechanical damage risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The asymmetric latch design with a lever arm on only one side works in conjunction with the seating floor to accommodate varying contact lengths. The lever arm guides the release motion to occur in a controlled manner that prevents rotation, while the seating floor provides mechanical support for different contact length configurations. This combination maintains adaptability while eliminating the harmful rotation effect.

Inventive Principle:

Principle #4Asymmetry

3Ease of operation

If both latches have lever arms for user force application, then the release mechanism is symmetric and easy to operate, but uneven force application causes DIMM rotation and pin damage

Engineering Contradiction:

Improvelatch releaseVSAvoidsocket pin integrity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

By making the latch structure asymmetric - with a lever arm on the first latch and no lever arm on the second latch - the patent eliminates the possibility of uneven force application that causes rotation. The user can only effectively actuate the first latch with the lever arm, which controls the release sequence to prevent pin damage while maintaining operational simplicity.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS12300931B2Dual in-line memory module (DIMM) socket that prevents improper DIMM release

Publication Date: 2025.05.13 INTEL CORP

AI summary

An apparatus is described. The apparatus includes a dual-in line memory module (DIMM) socket having a first latch and a second latch. One of the first latch and the second latch having a feature for a user to apply force to release a DIMM from the DIMM socket. The other of the first latch and the second latch not having a feature for the user to apply force so that one end of the DIMM releases before an opposite end of the DIMM during release of the DIMM from the DIMM socket.