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Zipper Fin & Skiving

Fabrication for High Fin Density Heat Sinks

Zipper Fin Heat Sinks

ATS offers a variety of pre-tooled zipper fin profiles, in addition to custom zipper fin heat sink designs, providing a significant cost savings for customers. Zipper fin heat sinks are a more cost effective and lower weight alternative to other high fin density solutions, especially for high volume production. Zipper fins are stamped from thin sheet metal, typically aluminum or copper, and are formed into a shape. The sheets interlock with each other and the resulting fin assembly is then wave soldered/bonded to a metal base. One of the primary advantages for choosing a zipper fin heat sink is because they can be designed in high aspect ratio fin profiles, enabling taller, thinner and more densely packed fins for increased cooling performance. Zipper fin heat sinks can also be designed with heat pipes and integral ducts which improve thermal performance, especially with active sinks that receive airflows from fans and blowers. Click here additional Zipper Fin Information.

Skived Heat Sinks

Skived heat sinks are fabricated by precisely slicing layers from bar stock metal block before being bent at the base of the slide, forming very thin, curved fins. Skiving allows heat sinks to have a high fin density, with fin thickness as low as 0.25mm and only 0.5mm spacing between fins and up to 70 and 60mm in height for aluminum and copper, respectively.