A vapor chamber includes a plate and a wick structure. The plate is provided therein with a working fluid, and the plate has a heated end and a condensed end. The wick structure includes a first wick portion adhered to be opposite to the heated end, a second wick portion overlapping on the first wick portion, and a third wick portion adhered on the rest portion of a chamber. The aperture diameter of the first wick portion is larger than that of the second wick portion, or the aperture density of the first wick portion is smaller than that of the second wick portion. The amount of working fluid attached to the second wick portion is smaller than that of the first wick portion. After heating, the working fluid attached to the second wick portion is vaporized more quickly.
1. A vapor chamber, comprising:
a plate with an interior hollowed and having a chamber, the chamber being provided therein with working fluid, one surface of the plate being used as a heated end, the other opposite surface of the plate being used as a condensed end; and
a wick structure adhered on inner wall surfaces of the chamber and comprising a first wick portion adhered to the plate opposite to the heated end, a second wick portion overlapping the entire first wick portion, and a third wick portion adhered on remaining inner wall surfaces of the chamber and not overlapping either the first wick portion or the second wick portion, the third wick portion being opposite to the condensed end being separated from the second wick portion by the chamber;
wherein an aperture diameter of the first wick portion is larger than that of the second wick portion.
2. The vapor chamber according to claim 1 , wherein the plate includes a base and a top cover, and the base and the top cover are connected to each other to form the chamber.
3. The vapor chamber according to claim 2 , wherein a lower surface of the base is the heated end, and an upper surface of the top cover is the condensed end.
4. The vapor chamber according to claim 1 , wherein the first and second wick portions are woven meshes, and the first wick portion is more loosely than the second wick portion.
5. The vapor chamber according to claim 1 , wherein the first and second wick portions are made of sintering powder, and a powder size of the first wick portion is larger than that of the second wick portion.
6. The vapor chamber according to claim 1 , wherein the aperture diameter of the first wick portion is smaller than that of the third wick portion.
7. The vapor chamber according to claim 6 , wherein the first and third wick portions are woven meshes, and the first wick portion is more densely than the third wick portion.
8. The vapor chamber according to claim 6 , wherein the first and third wick portions are made of sintering powder, and a particle size of the first wick portion is smaller than that of the third wick portion.
9. A vapor chamber, comprising:
a plate with an interior hollowed and having a chamber, the chamber being provided therein with working fluid, one surface of the plate being used as a heated end, the other opposite surface of the plate being used as a condensed end; and
a wick structure adhered on inner wall surfaces of the chamber and comprising a first wick portion adhered to the plate opposite to the heated end, a second wick portion overlapping the entire first wick portion, and a third wick portion adhered on remaining inner wall surfaces of the chamber and not overlapping either the first wick portion or the second wick portion, the third wick portion being opposite to the condensed end being separated from the second wick portion by the chamber;
wherein an aperture density of the first wick portion is smaller than that of the second wick portion.
10. The vapor chamber according to claim 9 , wherein the plate includes a base and a top cover, and the base and the top cover are connected to each other to form the chamber.
11. The vapor chamber according to claim 10 , wherein a lower surface of the base is the heated end, and a upper surface of the top cover is the condensed end.
12. The vapor chamber according to claim 9 , wherein the first and second wick portions are woven meshes, and the first wick portion is more loosely than the second wick portion.
13. The vapor chamber according to claim 9 , wherein the first and second wick portions are made of sintering powder, and a powder size of the first wick portion is larger than that of the second wick portion.
14. The vapor chamber according to claim 9 , wherein the aperture density of the first wick portion is larger than that of the third wick portion.
15. The vapor chamber according to claim 14 , wherein the first and third wick portions are woven meshes, and the first wick portion is more densely than the third wick portion.
16. The vapor chamber according to claim 14 , wherein the first and third wick portions are made of sintering powder, and a particle size of the first wick portion is smaller than that of the third wick portion.