Overview
Now you need to protect a high speed I/O or an RF signal. Lower and lower capacitance protection with good clamping performance is necessary. In an increasing number of applications very low harmonic generation is needed. 

Futurewafer has the answer for –

Low capacitance - freeing some room in your link budget / maximizing signal integrity While still providing strong ESD protection
High Linearity – reducing harmonic generation / intermodulation distortion for protected lines near strong RF signals in your system… enabling suppression EMC problems Exceptional quality, reliability, and volume support – so that when your design is done, it really is done small packaging to support minimum board space consumption and optimal placement