High-frequency piezoelectric micromechanical ultrasonic transducers (PMUTs) are employed in variousapplications including fingerprint recognition, non-destructive testing, and medical imaging. In this study, thechallenges associated with using lead zirconate titanate piezoelectric ceramics (PZT) in non-invasive vascular imagingand limitations of 1-D PMUT arrays are addressed by designing and fabricating a 2D PMUT array based on ScAlNpiezoelectric film. To optimize output performance and minimize gate lobe influence, a parallel-hexagon array is designedwith a spacing of half a wavelength (300 μm) to enhance the filling factor, reduce impedance, and improveoutput current. A silicon-on-insulator (SOI) wafer is utilized as the substrate for the PMUT, facilitating the MEMSprocess flow and wafer fabrication. The morphology and structure size of the PMUT are characterized using scanningelectron microscopy and focused ion beam cutting. The measured resonant frequency in water is 2.36 MHz,with a simulation-test discrepancy of 9.2% and satisfactory displacement sensitivity, suggesting its suitability fornon-invasive vascular imaging applications.