Immersion liquid cooling heat sink

An immersion liquid cooling heat sink, configured to be immersed in a dielectric liquid to cool a heat generating element, the immersion liquid cooling heat sink comprising:

• a substrate, configured to attach onto the heat generating element immersed in the dielectric liquid;
• a fin assembly, installed on the substrate, and comprising a first fin module and a second fin module, the first fin module and the second fin module respectively comprising a plurality of passages, wherein two ends of each passage are provided with an inlet and an outlet, the first fin module and the second fin module are spaced from each other and arranged side by side to define a first groove therebetween, and the first groove communicates between each inlet of the first fin module and each inlet of the second fin module;
• and
• a housing, installed on the substrate, comprising a first liquid inlet port, and entirely covering the fin assembly and exposing each outlet of the first fin module and each outlet of the second fin module, wherein the first liquid inlet port is located corresponding to and communicates with the first groove.