Matching layers are provided, including: electrically conductive acoustic
matching layers, methods for conducting electric current through matching
layers, methods for manufacturing multi-dimensional arrays using
conductive matching layers, and multi-dimensional arrays with
electrically conducting matching layers. Matching layers with conductors
aligned for providing electrical conduction through the thickness or
range dimension of the matching layer are provided. For example, vias,
aligned magnetic particles, or conductive films at least partially or
entirely within the matching layer of each element allow electrical
conduction from the transducer material to a ground foil or flex circuit.
By using multiple electrical conductive matching layers, a gradation in
acoustic impedance for better matching is provided while allowing dicing
of the entire stack, including the matching layers and the electroceramic
material, in one step.