A Method for Enhancing Wetting Characteristics and Phase-change Thermal Performance of Heat Sink

A technology of wetting characteristics and phase transformation heat, which is applied in chemical instruments and methods, cleaning methods and utensils, cooling/ventilation/heating transformation, etc. It can solve problems such as unfavorable assembly line operation, unsatisfactory cleaning effect, and cumbersome operation steps. , to achieve the effect of improving the strengthening effect, fast processing speed and simple process

Active Publication Date: 2021-04-02
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for surfaces with micro-nano structures (such as micro-channels, micro-pillars, micro-ribs, and micro-channels containing nano-structures), due to the high surface tension of water, water cannot enter the interior of some micro-nano structures, so the cleaning effect Not ideal, not only that, but the commonly used ultrasonic cleaning method takes a long time, and the operation steps are relatively cumbersome (such as drying after cleaning), which is not conducive to the assembly line operation in industrial production, and is easy to introduce secondary pollution

Method used

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  • A Method for Enhancing Wetting Characteristics and Phase-change Thermal Performance of Heat Sink
  • A Method for Enhancing Wetting Characteristics and Phase-change Thermal Performance of Heat Sink
  • A Method for Enhancing Wetting Characteristics and Phase-change Thermal Performance of Heat Sink

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Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 2 As shown, the heat sink has a micro-nano structure surface, and after constructing a channel array with dimensions (including channel width, height and channel spacing) preferably between 0.01-0.9 mm on the flat heat sink, a micron-scale channel array structure can be formed heat sink, referred to as microchannel heat sink 11. When the heat load of the heat-generating device is input, the heat sink of this structure can undergo micro-scale phase transformation heat, and realize the heat dissipation process of high heat transfer coefficient and heat flux density. However, in the process of mechanical processing and daily storage, there will be more grease and oil residue inside the microchannel, such as figure 2 The partially enlarged schematic diagram of the internal cross-section of the channel is shown. Grease and oil stains 12 cover the inner surface of the heat sink micro-channel. Due to its own hydrophobic characteristics and blockage of the mi...

Embodiment 2

[0052] Such as Figure 4 As shown, the heat sink has a flat surface, and the plasma treatment can clean the grease and oil on the surface of the heat sink in batches and perform functional modification on the surface, so as to obtain a heat sink with excellent wetting characteristics and phase transfer heat performance on a large scale , so as to facilitate the industrial production of high-performance radiators. Initially clean the surfaces of multiple heat sinks to remove dust or solid particle impurities that may be contained on the heat sink surfaces. Then place multiple heat sinks that have been preliminarily cleaned in the processing chamber, select one or more of argon, nitrogen, and oxygen as the process gas, and generate corresponding single-component plasma or mixed plasma to process the heat sink . Layered trays are arranged inside the plasma processing chamber, which is convenient for placing multiple heat sinks in the chamber, so that they are evenly distributed...

Embodiment 3

[0054] Such as Figure 5 As shown, spin-coating graphene solution on copper plate 31 and drying will add a layer of porous graphene nano-coating 32, and the coating thickness is preferably between 1-10000nm, forming a kind of heat with nano-coating on the surface. Shen, there may be some grease and oil on the surface of the heat sink 33, the surface of the nanostructure heat sink is initially cleaned, and after removing the dust or solid particle impurities that may be contained on the surface, one or more of argon, nitrogen, and oxygen are selected. As a process gas, the corresponding single-component plasma or mixed plasma is generated to treat the nanostructure heat sink, which can fully clean the grease and oil on the surface of the heat sink and perform functional modification on the surface to enhance the wetting characteristics and phase transition. heat transfer performance.

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Abstract

The invention discloses a method for strengthening wetting characteristics and phase-change heat exchanging performance of a heat sink. The method comprises the steps that a plasma is generated through a plasma generator; the plasma is utilized to clean the heat sink surface and conduct functional modification on the heat sink surface, wherein the radio-frequency power of the plasma generator is between 0 kW and 20 kW, the radio-frequency frequency of the plasma generator is between 10 kHz and 30 MHz, and the treating time of the plasma is between 1 minute and 60 minutes.

Description

technical field [0001] The invention relates to the field of phase-change heat technology, in particular to a method for enhancing the wetting characteristics and phase-change heat performance of a heat sink, especially for heat sinks used in high-power, high-power-density electronics, electric power, and optoelectronic devices. Enhancement of wetting properties and phase change heat performance. Background technique [0002] With the rapid development of high-tech fields such as microelectronics, high-performance computers, laser processing, high-power density LEDs, aerospace and microsystems, electronic devices present a trend of high-power, high-integration, and small-volume development. These energy-consuming electronics While the device exerts effective power, a considerable part of the electric power will be converted into heat, which will lead to a rapid increase in the heat flux density of the electronic device, which has exceeded 100W / cm 2 , if such high-intensity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B7/00H05K7/20
CPCB08B7/0035H05K7/2029
Inventor 周文斌胡学功王际辉单龙
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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