Acoustic sensor systems with different heights

A sensor system comprising:

• an acoustic receiver element comprising:
• a first portion of a first electrode layer;
• a first planarization layer disposed on the first portion of the first electrode layer;
• a first portion of a second electrode layer disposed on the first planarization layer;
• an isolation layer disposed on the first portion of the second electrode layer;
• and
• a first portion of a piezoelectric material disposed at least on the isolation layer;
• and
• an acoustic transmitter element comprising:
• a second portion of the first electrode layer;
• a second portion of the second electrode layer disposed on the second portion of the first electrode layer;
• and
• a second portion of the piezoelectric material disposed on the second portion of the second electrode layer;
• wherein an area associated with the acoustic transmitter element is larger than an area associated with the acoustic receiver element;
• wherein the first portion of the piezoelectric material of the acoustic receiver element comprises a first thickness;
• and
• wherein the second portion of the piezoelectric material of the acoustic transmitter element comprises a second thickness different from the first thickness.

An apparatus comprising:

• an acoustic receiver element comprising:
• a first electrode layer;
• a first portion of a second electrode layer;
• a first portion of an isolation layer disposed on the first portion of the second electrode layer;
• and
• a first portion of a piezoelectric material disposed on the first portion of the isolation layer;
• and
• an acoustic transmitter element comprising:
• a second portion of the second electrode layer;
• a second portion of the isolation layer disposed on the second portion of the second electrode layer;
• and
• a second portion of the piezoelectric material disposed on the second portion of the isolation layer;
• wherein the first portion of the piezoelectric material of the acoustic receiver element comprises a first thickness, and the second portion of the piezoelectric material of the acoustic transmitter element comprises a second thickness different from the first thickness;
• wherein an area associated with the acoustic transmitter element is larger than an area associated with the acoustic receiver element;
• and
• wherein the isolation layer is structured to create a gap that physically separates the first portion of the second electrode layer from the second portion of the second electrode layer.