Ultrasound probe and production method of the same

Abstract

An ultrasound probe comprising a transmitting piezoelectric layer, an electrode layer and a receiving piezoelectric layer laminated in that order, the ultrasound probe transmitting and receiving an ultrasound, wherein a polarization treatment on the receiving piezoelectric layer is carried out by providing a peelable dielectric layer on the receiving piezoelectric layer.

1 . An ultrasound probe comprising a transmitting piezoelectric layer, an electrode layer and a receiving piezoelectric layer laminated in that order, the ultrasound probe transmitting and receiving an ultrasound, wherein
 a polarization treatment on the receiving piezoelectric layer is carried out by providing a peelable dielectric layer on the receiving piezoelectric layer.   
     
     
         2 . The ultrasound probe of  claim 1 , wherein the piezoelectric layer is closely attached to the receiving piezoelectric layer during the polarization treatment, and the piezoelectric layer is peeled from the receiving piezoelectric layer after the polarization treatment is finished. 
     
     
         3 . The ultrasound probe of  claim 1 , wherein the dielectric layer comprises an organic material and inorganic dielectric particles. 
     
     
         4 . The ultrasound probe of  claim 3 , wherein the inorganic dielectric particles are selected from the group consisting of quartz, LiNbO 3 , K(Ta,Nb)O 3 , BaTiO 3 , LiTaO 3  and SrTiO 3 . 
     
     
         5 . The ultrasound probe of  claim 1 , wherein the transmitting piezoelectric layer comprises an inorganic material, and the receiving piezoelectric layer comprises an organic material. 
     
     
         6 . The ultrasound probe of  claim 1 , wherein the polarization treatment is a direct current high voltage pulse application at 1 kV/m-1 MV/m or an alternating current high voltage pulse application at 1 kV/m-1 MV/m. 
     
     
         7 . The ultrasound probe of  claim 1 , wherein the polarization treatment is a corona discharge treatment. 
     
     
         8 . A method of manufacturing an ultrasound probe comprising the sequential steps of:
 laminating an electrode layer on a transmitting piezoelectric layer;   polarizing the transmitting piezoelectric layer;   laminating a receiving piezoelectric layer on the electrode layer;   providing a peelable dielectric layer on the receiving piezoelectric layer;   polarizing the receiving piezoelectric layer; and   peeling the dielectric layer from the receiving piezoelectric layer to obtain the ultrasound probe,   the ultrasound probe transmitting and receiving an ultrasound.   
     
     
         9 . The method of  claim 8 , wherein the dielectric layer comprises an organic material and inorganic dielectric particles. 
     
     
         10 . The method of  claim 9 , wherein the inorganic dielectric particles are selected from the group consisting of quartz, LiNbO 3 , K(Ta,Nb)O 3 , BaTiO 3 , LiTaO 3  and SrTiO 3 . 
     
     
         11 . The method of  claim 8 , wherein the transmitting piezoelectric layer comprises an inorganic material, and the receiving piezoelectric layer comprises an organic material. 
     
     
         12 . The method of  claim 8 , wherein the polarization treatment is a direct current high voltage pulse application at 1 kV/m-1 MV/m or an alternating current high voltage pulse application at 1 KV/m-1 MV/m. 
     
     
         13 . The method of  claim 8 , wherein the polarization treatment is a corona discharge treatment.