Microwave Atom Chip Development for Atom Interferometry

We present progress on the development of a microwave atom chip to be used for trapped atom interferometry using spin-specific AC Zeeman potentials. The chip uses three parallel microstrip transmission lines to generate microwave ACZ traps. Efficient DC-10 GHz coupling of microwave signals onto the chip is based on a tapered microstrip wedge interface. We present microfabrication progress of chip components using photolithography and evaporative deposition including the aluminum nitride-based wedge interface. This work furthers the development of our precision measurement capabilities for gravimetry and possible measurements of the Casimir-Polder force and submillimeter gravity. This work is supported by NSF.