Heat Radiation Arrangement Substrate Attachment Warpage

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Solution Overview

Problem

The existing heat radiation arrangements face a reduction in heat radiation efficiency due to substrate warpage caused by the resilience of thermal conductive elastic members, leading to decreased adhesion between the heating element and the heat radiating member.

Innovation Solution

A heat radiation arrangement where the substrate is secured to the casing within a region between two extended sides of the heating element, defined by the outer edges of the substrate, to suppress warpage and maintain high adhesiveness between the heating element, thermal conductive elastic member, and heat radiating member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the substrate is coupled to the casing at only four corners, then the device complexity is reduced and ease of manufacture is improved, but the substrate near the heating element deforms due to resilience of the thermal conductive elastic member, decreasing heat radiation efficiency

Engineering Contradiction:

Improveease of manufactureVSAvoidheat radiation efficiency

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The attachment structure is segmented into multiple regions: corner attachment points for structural support, and additional attachment points within the substrate area that do not interfere with the heating element. This segmentation allows the substrate to be securely attached without deforming the heating element region, maintaining both ease of manufacture and heat radiation efficiency.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If corner attachment is used, then the device complexity is reduced, but the distance from the heating element to the attachment points becomes longer, increasing substrate deformation

Engineering Contradiction:

Improvedevice complexityVSAvoidsubstrate deformation

Core Design Contradiction:

Device complexityVSShape

Solution Approach 1:

The attachment strategy transitions from purely corner-based (2D perimeter attachment) to include attachment points within the substrate area. This dimensional change in attachment location distribution provides better structural support closer to the heating element without increasing overall device complexity, as the additional attachments are integrated into the existing substrate-casing interface.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If the substrate is securely attached to prevent deformation, then heat radiation efficiency is maintained, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveheat radiation efficiencyVSAvoidease of manufacture

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The attachment strategy applies local quality by differentiating between attachment regions: corner points provide structural support, while additional attachment points are strategically placed in areas that do not interfere with the heating element. This localized differentiation maintains heat radiation efficiency in the heating element region while providing secure overall attachment, without uniformly increasing manufacturing complexity across the entire device.

Inventive Principle:

Principle #3Local quality

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 configuration effectively suppresses substrate warpage, maintains high adhesiveness, and prevents a reduction in heat radiation efficiency by ensuring consistent contact and thermal conduction.

Implementation Method 1

a heat radiating member that abuts a surface of the heating element via a thermal conductive elastic member

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

due to a resilience of the thermal conductive elastic member

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS9204572B2Heat radiation arrangement

Publication Date: 2015.12.01 TOYOTA JIDOSHA KK

AI summary

A disclosed heat radiation arrangement includes a substrate that has a first surface on which a heating element is installed; a heat radiating member that abuts a surface of the heating element via a thermal conductive elastic member, the surface of the heating element being on an opposite side with respect to a side of the first surface; and a casing to which the substrate and the heat radiating member are attached, wherein the substrate is secured to the casing within a region between two extended sides and on opposite sides of the heating element when viewed in a direction perpendicular to the first surface, these two extended sides being defined by extending two opposite sides of the heating element, which form outer edges of the heating element, toward outer edges of the first surface.