Insulated Metal Substrate
With power LED devices and power circuits development together with a general need of heat take off from components, IMS (insulated material substrate) material is more frequently applied. IMS material consist of base layer, usually made of aluminum, dielectric layer and copper foil. Aluminum can be replaced by copper, but this option is much more expensive. Base layer can be connected to cooling device which ensures optimum cooling. Dielectric layer differs also by thermal conductivity besides layer thickness. MSC Polymer POLYTHERM 1.3 W-m-1.K-1 and aluminum composition of 5052 is used as standard.