Drive Case Thermal Heatsink for Compact HDD Heat Dissipation

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Solution Overview

Problem

As electronic devices such as hard disk drives (HDDs) and digital versatile discs (DVDs) shrink in size, heat dissipation becomes increasingly challenging due to high power integrated circuits generating significant thermal energy, especially in compact form factors where traditional cooling methods are less effective.

Innovation Solution

The drive assembly case is utilized as a thermal heatsink by either direct contact or through a thermal interface material between the integrated circuits and the drive assembly case, enhancing heat dissipation by leveraging the larger surface area of the case, and additional thermal vias can be added to improve thermal performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the drive system uses compact form factor, then the device size is reduced, but heat dissipation becomes more difficult

Engineering Contradiction:

Improvedevice sizeVSAvoidheat dissipation

Core Design Contradiction:

Volume of moving objectVSTemperature

Solution Approach 1:

The patent merges the structural housing (drive assembly case) with the thermal management function by attaching heatsinks directly to the case, which then conduct heat away from integrated circuits. This combines the protective enclosure with the heat dissipation function, solving the space constraint issue in compact form factors.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The drive assembly case serves multiple functions: it provides structural protection, mechanical support, and now also serves as a thermal management component through integrated heatsinks. This multi-functionality allows effective heat dissipation without adding separate cooling components that would increase device size.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If traditional cooling methods are used, then heat dissipation is effective, but the device size increases

Engineering Contradiction:

Improveheat dissipationVSAvoiddevice size

Core Design Contradiction:

TemperatureVSVolume of moving object

Solution Approach 1:

Instead of using separate traditional cooling components, the patent combines the heatsink function with the existing drive assembly case structure. The heatsinks are mounted directly to the case, which already serves as a structural component, thereby achieving effective cooling without increasing overall device volume.

Inventive Principle:

Principle #5Merging (Combining)

3Temperature

If thermal interface material is used between IC and case, then heat dissipation is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveheat dissipationVSAvoidmanufacturing complexity

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

The patent introduces a thermal interface material as an intermediary substance between the integrated circuit and the heatsink/case. This material fills microscopic gaps and improves thermal contact, significantly enhancing heat transfer efficiency. While it adds a manufacturing step, the material itself is simple to apply and removes air gaps that would otherwise impede heat flow.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

This approach provides an effective and cost-efficient method for dissipating heat generated by high power integrated circuits in compact HDD and DVD systems, addressing the challenge of heat management in smaller form factors.

Implementation Method 1

a first thermal interface material thermally coupled between i) the printed circuit board and ii) the drive assembly case. Thermal energy generated by the first integrated circuit is dissipatable by the drive assembly case through the first interface material.

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

Methodology Applied

Scientific EffectHeat sink: Heat Sink

Data Source

PatentUS8218261B1Thermal solution for drive systems such as hard disk drives and digital versatile discs

Publication Date: 2012.07.10 MARVELL ASIA PTE LTD

AI summary

A drive system including: a printed circuit board; a first integrated circuit mounted onto the printed circuit board; a drive assembly case that is connected to the printed circuit board; and a first thermal interface material thermally coupled between i) the printed circuit board and ii) the drive assembly case. Thermal energy generated by the first integrated circuit is dissipatable by the drive assembly case through the first interface material.