Stacked heat sinks are formed by using a high pressure to press single fins, multiple fins, and single extrusions together into a stacked heat sink. This type of stacked fin heats which are formed by press-fit approach can realize a cooling structure that has both top and bottom base plates for mounting power devices. No interface material is required for assembly when using this technique and it has the benefits of low development cost, high flexibility in forming heat sinks with different width and structures so that it is highly universal. This technique has been widely used in the cooling of high power devices such as power inverters and transformers, generators, etc. 
Stacked heat sinks have advantages such as increasing cooling area while forming a closed passage at the same time so as to achieve higher thermal performance, no restriction on it volume, higher strength, lower manufacturing cost, easier installation and maintenance, longer service life, etc.