Method for manufacturing a heat-dissipation unit including a heat-dissipation microstucture
A heat-dissipation unit with heat-dissipation microstructure and method of manufacturing the same is disclosed. The heat-dissipation unit with heat-dissipation microstructure includes a main body internally defining a chamber; a wick structure formed on an inner surface of the chamber; and at least a SiO 2 nano thin film coated on the wick structure. The SiO 2 nano thin film is formed of a plurality of SiO 2 nanograins, and is coated on the wick structure of the heat-dissipation unit through the sol-gel process. With the at least one layer of SiO 2 nano thin film coated on the wick structure, it is able to upgrade the heat dissipation performance of the heat-dissipation unit.
1. A method of manufacturing heat-dissipation unit with heat-dissipation microstructure, comprising the steps of:
providing a heat-dissipation unit that includes an internal chamber;
forming a wick structure on an inner surface of the internal chamber of the heat-dissipation unit;
coating the wick structure with an oxide nano thin film;
drying the wick structure after the wick structure has been coated with the oxide nano thin film;
sintering the wick structure after the wick structure has been coated with the oxide nano thin film and dried;
after sintering the wick structure, providing a vacuum within the internal chamber of the heat-dissipation unit; and
injecting a working fluid into the internal chamber of the heat-dissipation unit and sealing an open end of the heat-dissipation unit.
2. The method as claimed in claim 1 , wherein the oxide nano thin film is formed of a material selected from the group consisting of Al203, SiO2, ZrO2, CaO, K20, TiO2, and ZnO.
3. The method as claimed in claim 1 , wherein the coating of the wick structure is performed using a sol-gel process.
4. The method as claimed in claim 3 , wherein the sol-gel process is performed using a method selected from a group of methods consisting of dip-coating deposition, settle-coating deposition, spin-coating deposition, spray-coating deposition, brush-coating deposition, and wet-coating deposition.
5. The method as claimed in claim 1 , wherein the drying step is performed at a temperature ranged between 50° C. and 200° C.
6. The method as claimed in claim 1 , wherein the sintering step is performed at a temperature ranged between 200° C. and 800° C.
7. The method as claimed in claim 1 , wherein the wick structure is formed of a material selected from the group consisting of copper, aluminum, nickel and stainless steel.
8. The method as claimed in claim 1 , wherein the working fluid is selected from the group consisting of deionized water, alcohol, and a coolant.
9. The method as claimed in claim 1 , wherein, after the step of forming the wick structure on the inner surface of the internal chamber of the heat-dissipation unit, performing an oxidation-reduction process by supplying hydrogen into the internal chamber.
10. The method as claimed in claim 1 , wherein the oxide nano thin film is selected from the group consisting of a metal oxide nano thin film and a semiconductor oxide nano thin film.