Patent ID: 6840123

Claim:
A mass sensor comprising: a sensor substrate; at least one connection plate extending along a first direction and having a first end attached to a first portion of said sensor substrate and an opposed second end; at least one diaphragm attached to said second end of said connection plate; means for changing the mass of said diaphragm, said means being positioned on said diaphragm; at least one sensing plate having a first end attached to a second portion of said sensor substrate and an opposed second end attached to said diaphragm; and at least one piezoelectric element arranged on at least a portion of a surface of said sensing plate; wherein said sensing plate and said sensor substrate are arranged in substantially parallel planar relationship with respect to one another and wherein said at least one connection plate, said at least one diaphragm, said at least one sensing plate and said at least one piezoelectric element define a resonance portion.