Patent ID: 7143487

Claim:
A manufacturing method of a matrix type ultrasonic probe having a backing material, and a plurality of piezoelectric elements having upper and lower face electrodes, respectively, and arrayed in two-dimensional directions on said backing material, said method comprising the steps of: providing the backing material having a surface provided thereon with a first plate member, which has a surface to which one ends of signal lines corresponding to every piezoelectric elements are exposed; fixedly securing, by conductive adhesive, a piezoelectric plate, which has a lower face provided thereon with a second plate member formed therein with through-holes corresponding to each of the piezoelectric elements, to the backing material provided with said first plate member; and dividing said piezoelectric plate into individual piezoelectric elements by forming slits extending from an upper face of said piezoelectric plate and reaching said backing material, wherein said first and second plate members are made of a resin plate, respectively.