The IS350MD is a proprietary high performance, mid-Dk, low-loss, halogen-free material specifically designed for the high-end mobile applications. It has a base material of type FR-4. The resin matrix is based on a modified epoxy resin conventional E-glass-fabric is used for reinforcement. The requirements of flammability class V-0 as per UL 94 are met without addition of antimony compounds. Since this material does not contain halogens, it displays greater thermal stability than a standard FR-4, as time to delamination (T288) measurements prove.