Abstract: A biosensor assembly includes a plurality of biosensor units which are juxtaposed next to one another. Respective portions of a continuous piezoelectric monocrystal layer are dedicated to the biosensor units, and Bragg solid bulk structures are arranged on the piezoelectric layer between the portions thereof that pertain to neighboring biosensor units. Each Bragg structure has a pattern repetition direction that is parallel to the piezoelectric layer, and is designed for confinement of elastic vibrations and suppressing cross-talk between the biosensor units. The biosensor assembly can be manufactured from a piezoelectric wafer with low cost price.