IS350MD series halogen-free laminates and prepregs has a Dk of 3.51, for ultrathin dielectric applications such as high-end mobile devices. Is an FR-4 type base material with a resin matrix; is based on a modified epoxy resin reinforced with conventional E-glass fabric. Meets flammability class V-0 per UL-94 without addition of antimony compounds. Contains no halogens, and is said to display greater thermal stability than standard FR-4. Can be tailored to any thickness. Requires a short press cycle and does not require plasma for desmearing.
Isola Group, www.isola-group.com/products/is350md/