▎ 摘　　要

NOVELTY - The transducer has a substrate whose bottom part is formed with an insulating layer and top part is formed with a graphene layer. The graphene layer is provided a lower electrode. A cavity i.e. circular hole, is formed between the graphene layer and the lower electrode to form a plate capacitor structure, where diameter of the circular hole is about 0.5-200 to m microns. The substrate is made of silicon dioxide or flexible organic material. The lower electrode is made of germanium and gold composite metal electrode, polysilicon electrode and/or transparent conductive glass. USE - Capacitive ultrasonic transducer. ADVANTAGE - The transducer has high sensitivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a capacitive ultrasonic transducer manufacturing method. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a capacitive ultrasonic transducer.