Tec-speed 10.0 PCB materials for high-speed, low-loss applications has Dk values between 2.3 and 2.8.
Uses FR-4 processes. Permits higher layer counts on backplanes, daughtercards and handheld in a smaller footprint due to smaller layer-to-layer separation without sacrificing trace width. Df of 0.002 to 0.004.
Ventec, www.venteclaminates.com