Ultrasound transducer array, endoscope, and manufacturing method of ultrasound transducer array

An endoscope comprising:

• an insertion portion configured to be inserted to an inside of a subject;
• and
• an ultrasound transducer array that includes
• a transducer group that is arranged at a distal end of the insertion portion and that includes a plurality of ultrasound transducers aligned, the transducers being configured to transmit and receive ultrasonic waves;
• a signal line configured to electrically connect the transducer group and an external device and transmit a signal communicated by the transducer group and the external device;
• and
• a relay board that is a bendable relay board and that has a first end and a second end, the first one end being branched, the first end being connected to each of the ultrasound transducers, the second end being connected to the signal line to relay transmission and reception of the signal between the ultrasound transducers and the signal line, branched portions of the first end of the relay board extending in a direction of alignment of the ultrasound transducers.

An ultrasound transducer array comprising:

• a transducer group including a plurality of ultrasound transducers aligned, the transducers being configured to transmit and receive ultrasonic waves;
• a signal line configured to electrically connect the transducer group and an external device and transmit a signal communicated by the transducer group and the external device;
• and
• a relay board having a first end and a second end, the first end being connected to each of the ultrasound transducers, the second end being connected to the signal line to relay transmission and reception of the signal between the ultrasound transducers and the signal line, the relay board including an opening portion configured to expose a part of the ultrasound transducers, the relay board being electrically connected to the ultrasound transducers at a portion extending in a direction of alignment of the ultrasound transducers in peripheral portions of the opening portion.