A heat sink is used to solve the problem of poor capillary effect of a conventional vapor chamber. The heat sink comprises a casing having a chamber filled with a working fluid. The heat sink further comprises at least one metal net disposed in the chamber. The at least one metal net includes a plurality of first metal wires and a plurality of second metal wires. The plurality of first metal wires and the plurality of second metal wires interlace with each other and are woven to form a plurality of holes. Each of the plurality of holes is surrounded and defined by adjacent first metal wires and adjacent second metal wires. The plurality of holes has at least two different sizes.
1. A heat sink comprising:
a casing including a chamber filled with a working fluid; and
at least one metal net disposed in the chamber, wherein the at least one metal net includes a plurality of first metal wires and a plurality of second metal wires, wherein the plurality of first metal wires and the plurality of second metal wires interlace with each other and are woven to form a plurality of holes, wherein each of the plurality of holes is surrounded and defined by two adjacent first metal wires and two adjacent second metal wires, and wherein the plurality of holes have at least two different sizes;
wherein at least two adjacent first metal wires and/or at least two adjacent second metal wires form a group, such that the plurality of first metal wires and/or the plurality of second metal wires form plural groups of first metal wires and/or plural groups of second metal wires, wherein two adjacent first metal wires of each group and/or two adjacent second metal wires of each group have a first spacing therebetween, wherein two adjacent groups of first metal wires and/or two adjacent groups of second metal wires have a second spacing therebetween, and wherein the second spacing is greater than the first spacing; and
wherein the plural groups of first metal wires and the plural groups of second metal wires interlace with each other and are woven to include a plurality of overlapped portions, and wherein the plurality of overlapped portions is pressed or rolled to adjust shapes, such that projections of holes surrounded by the plurality of overlapped portions present deformed holes having irregular shapes and having different sizes.
2. The heat sink as claimed in claim 1 , wherein the casing includes a first casing part and a second casing part, wherein the first casing part and/or the second casing part has a receiving compartment which forms the chamber.
3. The heat sink as claimed in claim 1 , wherein the at least one metal net includes overlapped portions which are not punched nor rolled to adjust shapes.
4. The heat sink as claimed in claim 1 , wherein at least two of the plurality of first metal wires and/or at least two of the plurality of second metal wires are woven by helically twisting or intertwining.
5. The heat sink as claimed in claim 1 , wherein the at least one metal net includes a plurality of overlapped layers of metal nets.
6. The heat sink as claimed in claim 5 , wherein the plurality of first metal wires and/or the plurality of second metal wires of one of the plurality of overlapped layers of metal nets are aligned with the holes of another of the plurality of overlapped layers of metal nets.
7. The heat sink as claimed in claim 5 , wherein the plurality of metal nets has different meshes.
8. The heat sink as claimed in claim 5 , wherein the plurality of metal nets is overlapped in a vertical direction and is misaligned from each other by an angle in a horizontal direction perpendicular to the vertical direction.
9. The heat sink as claimed in claim 1 , further comprising at least one supporting member, wherein the at least one supporting member is sandwiched between a surface of the at least one metal net and an inner wall of the casing.
10. The heat sink as claimed in claim 9 , wherein the at least one supporting member includes a plurality of supporting members spaced from each other, and wherein each of the plurality of supporting members is sandwiched between the surface of the at least one metal net and the inner wall of the casing.