Nano-Web Heat Radiation Sheet for Thin Electronics Cooling
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Solution Overview
Problem
Conventional heat radiation sheets are thick and difficult to precision-blank for thin electronic equipment, and their adhesive foam structure hinders effective heat dissipation, posing risks of equipment failure and malfunction due to thermal energy accumulation.
Innovation Solution
A heat radiation sheet is manufactured in a nano-web form using the electrospinning method, incorporating a heat conductive material in both the radiation layer and adhesive layer to enhance thermal conductivity and adhesion, allowing for improved heat dissipation and precision in thin electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an adhesive foam sheet is attached on a metal plate to create a heat radiation sheet, then the sheet has heat radiation capability, but the sheet becomes thick and difficult to use in thin electronic equipment
Solution Approach 1:
The patent uses a foam structure with numerous cells as the adhesive layer, which provides both adhesive properties and heat radiation capability while maintaining thin thickness. The porous foam structure allows heat transmission while providing sufficient adhesion to bond the heat radiation sheet to the metal plate, resolving the contradiction between heat radiation performance and sheet thickness.
2Strength
If a foam sheet with adhesiveness is used in the heat radiation sheet, then the sheet has good adhesion, but it is difficult to blank the sheet precisely during manufacturing
Solution Approach 1:
The foam structure with its cellular configuration provides adhesion through the cell walls and surfaces while maintaining structural integrity that allows for precise blanking. The porous nature distributes stress evenly during cutting operations, preventing deformation that would occur with solid adhesive materials, thus enabling both good adhesion and manufacturing precision.
3Length of stationary object
If the heat radiation sheet is made thin for portable electronic equipment, then the equipment can be slimmer, but heat dissipation becomes less effective
Solution Approach 1:
The patent creates a composite structure combining a foam adhesive layer with heat radiation properties and a metal plate with high thermal conductivity. This composite material approach allows the thin sheet to maintain effective heat dissipation by leveraging the complementary properties of both materials - the foam provides adhesion and heat radiation while the metal plate provides high thermal conductivity for efficient heat transfer.
Solution Approach 2:
The foam structure's porous configuration provides thermal pathways through its cell structure, enabling effective heat dissipation even in a thin profile. The numerous cells create extended surface area and thermal conduction paths that maintain heat radiation efficiency while keeping the overall sheet thickness minimal for portable electronic equipment.
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 nano-web structure enables thin, efficient heat radiation sheets with enhanced thermal conductivity and adhesion, effectively preventing overheating and improving the reliability of thin electronic equipment by facilitating precise attachment and efficient heat transfer.
Implementation Method 1
a heat radiation layer which is formed in the form of a nano-web having a plurality of pores by electrospinning a spinning solution
Implementation Method 2
a heat conductive material is contained in the adhesive layer, to thereby enable the adhesive layer to have heat radiation performance
Implementation Method 3
a heat radiation sheet that is mounted in an electronic device, to thereby radiate heat generated from the inside of the electronic device to the outside of the electronic device
Data Source
AI summary
Provided is a method of manufacturing a heat radiation sheet. The method includes the steps of: electrospinning a first spinning solution comprising an adhesive, first heat conductive particles, and a first solvent to form an adhesive layer in a form of a nano-web having a plurality of pores; mixing second heat conductive particles and a second solvent to obtain a second spinning solution; electrospinning the second spinning solution onto the adhesive layer to form an intermediate layer; mixing a polymer material, a third solvent, and third heat conductive particles to obtain a third spinning solution; and electrospinning the third spinning solution onto the intermediate layer to form a heat radiation layer in a form of a web on the intermediate layer.