Heat Sink TIM Holder Prevents Thermal Interface Damage

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Solution Overview

Problem

The existing heat sink assemblies for pluggable modules often damage thermal interface materials during module insertion, leading to performance loss or failure due to increased heat generation from higher power and switching speeds, making it difficult to load and remove modules.

Innovation Solution

A heat sink assembly with a thermal interface material (TIM) layer attached between the heat sink and the pluggable module, where the TIM layer is held by holders on the heat sink, preventing damage during module insertion and ensuring secure thermal communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a thermal interface material is attached to the heat sink for thermal communication, then thermal transfer efficiency is improved, but the TIM may be damaged during module insertion causing performance loss or failure

Engineering Contradiction:

Improvethermal interface material performanceVSAvoiddamage to thermal interface material

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by pre-attaching the thermal interface material to the heat sink before module insertion. The TIM is secured to the heat sink's module side with adhesive in advance, creating a stable thermal interface that won't be damaged during subsequent module loading operations.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements beforehand cushioning by positioning the TIM layer between the heat sink and the module's bottom surface. This TIM layer acts as a protective cushion that absorbs mechanical stresses during insertion, preventing direct contact damage between the module and heat sink while maintaining thermal communication.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Ease of operation

If the pluggable module slides along the thermal interface material during loading, then the module can be inserted into the receptacle, but the thermal interface material may be torn or pulled away from the heat sink

Engineering Contradiction:

Improvemodule insertionVSAvoidthermal interface material integrity

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The TIM is pre-attached to the heat sink with adhesive before module insertion. This preliminary bonding creates a strong anchor point that prevents the TIM from being torn or pulled away during the sliding insertion process, while still allowing the module to slide along the TIM surface.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The TIM layer serves as an intermediary between the heat sink and the module. It provides a sliding surface that facilitates easy module insertion while the adhesive attachment to the heat sink prevents the TIM from being damaged during this sliding process.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If an exposed end of the thermal interface material is left uncovered, then the TIM can engage the pluggable module, but the exposed end is susceptible to being snagged on the module

Engineering Contradiction:

Improvemodule engagementVSAvoidsnagging of thermal interface material

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent extracts the problematic exposed end of the TIM from the system by positioning the TIM layer entirely between the heat sink and the module. The TIM extends from the heat sink's module side but is contained within the interface area, eliminating any exposed ends that could be snagged on the module during insertion or removal.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The TIM layer is pre-positioned and adhesive-attached to the heat sink before module insertion. This preliminary positioning ensures the TIM covers exactly the right area to engage the module without creating exposed ends that could be snagged during subsequent operations.

Inventive Principle:

Principle #10Preliminary action

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 prevents damage to the thermal interface material, maintaining its performance and facilitating easier module loading and removal while enhancing thermal transfer efficiency.

Implementation Method 1

A thermal interface material (TIM) layer extends on the module side of the heat sink. The TIM layer is configured to engage the pluggable module... the module side is configured to thermally communicate with the pluggable module

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS8345445B2Heat sink assembly for a pluggable module

Publication Date: 2013.01.01 TE CONNECTIVITY SOLUTIONS GMBH

AI summary

A heat sink assembly is provided for a pluggable module. The heat sink assembly includes a heat sink having a module side and an end surface that intersects the module side. The module side is configured to thermally communicate with the pluggable module. A holder extends from the end surface of the heat sink. A thermal interface material (TIM) layer extends on the module side of the heat sink. The TIM layer is configured to engage the pluggable module. The TIM layer includes an end that is engaged between the end surface and the holder of the heat sink.