A pressure sensor system includes a pressure sensing capacitor and an inductor integrated in a substrate. The pressure sensing capacitor includes a conductive diaphragm for detecting a pressure differential and an electrode separated from the diaphragm by a predetermined gap formed in the substrate. The inductor and pressure sensing capacitor form a passive inductive-capacitive (LC) tank circuit. A remote interrogation circuit, inductively coupled to the pressure sensor inductor coil, can be utilized to detect changes in resonant frequency of the LC tank wirelessly. The fully integrated pressure sensor structure is manufactured utilizing layer-by-layer fabrication techniques.