Patent ID: 8136403

Claim:
A micromechanical sensor for analyzing samples, comprising a body, a planar wave guide portion spaced from the body, at least one electro-mechanical transducer element located on a lateral side of the wave guide portion for excitation of acoustic waves to the wave guide portion in response to electrical actuation, said lateral side of the wave guide portion being different from a wave guide portion side facing the body, and a sample-receiving zone on one surface of the wave guide portion for receiving a sample, wherein the sample-receiving surface of the wave guide portion is not parallel to said lateral side of the wave guide portion, wherein the at least one of the transducer element is configured to transmit laterally oscillating longitudinal bulk acoustic waves into the wave guide portion, wherein said laterally oscillating longitudinal bulk acoustic waves oscillate parallel to the sample-receiving surface of the wave guide portion and parallel to the propagation direction of said acoustic waves, and wherein the impact of the sample on the vibrational behavior of the wave guide portion is sensed using said laterally oscillating longitudinal bulk acoustic waves.