Metal heat-sink for electronic module

摘要

The heat sink (1) has a durable protective layer (5) with high thermal and electrical conductivity at least on the heat take-up side (2). The outer side which radiates heat is covered by a coating (6) e.g. powered lacquer, which increases the thermal radiation. The protective layer is applied to all surfaces of the body to form an adhesive layer for the coating. It is a chromatising layer esp. a yellow chromatising layer of thickness between about 100 nanometres and 1 micron.