Baw filter structure with internal electrostatic shielding

A bulk acoustic wave (BAW) filter assembly, comprising:

• a laminate comprising a laminate dielectric, a grounding trace at least partially positioned within the laminate dielectric, and a signal trace at least partially positioned within the laminate dielectric;
• and
• a BAW filter structure, comprising:
• a substrate;
• a plurality of transducers over the substrate, each of the plurality of transducers comprising a bottom electrode, a piezoelectric layer over the bottom electrode, and a top electrode over the piezoelectric layer, each of the plurality of transducers forming a portion of a BAW resonator and residing in a filter coupled between an input node and an output node and having an electrical field forming a parasitic capacitance;
• and
• a planar electrostatic shield between the substrate and at least one of the top electrodes of the plurality of transducers, the planar electrostatic shield coupled to a ground node and interrupting the electric field associated with the parasitic capacitance of the filter to reduce the parasitic capacitance;
• wherein the BAW filter structure is invertedly positioned over a top of the laminate.