Patent ID: 7017419

Claim:
A method of forming a micro-mechanical pressure sensor comprising the steps of: providing a first substrate, depositing a first masking layer on the first substrate, patterning the first masking layer on a front side of the first substrate, etching a cavity on the front side of the first substrate, removing the first masking layer from the first substrate, forming a bulk layer in the front side of the first substrate, depositing a second masking layer on the bulk layer, patterning the second masking layer on the back side of the first substrate to form an opening, etching a second cavity on the back side of the first substrate, thereby forming a diaphragm in the first substrate, removing the second masking layer from the first substrate, depositing a conductive layer on the front side of the first substrate to provide a highly conductive diaphragm, providing a second substrate formed from a plurality of dielectric layers and a plurality of conductive layers forming an inductive coil, polishing the front side of the second substrate to achieve a smooth surface, depositing a second conductive layer on the front side of the second substrate, patterning the second conductive layer to form a counter electrode and a bonding area, and bonding the first and second substrates together to form an air gap between the conductive diaphragm and the counter electrode.