Patent ID: 7793546

Claim:
An ultrasonic flaw detection device for bringing an ultrasonic transmission medium into close contact with an inspection object with a polymer membrane interposed therebetween and for ultrasonically inspecting the inspection object via the ultrasonic transmission medium, the ultrasonic flaw detection device comprising: a medium container for containing an ultrasonic transmission medium, and having an opening which is sealed by a polymer membrane; an inspection object receiving container body for receiving an inspection object and having an opening where an inspection portion of a received inspection object is exposed; a frame body incorporated into or connected to the inspection object receiving container body, and with the polymer membrane defining a measurement environment space for an inspection object; a flexible diaphragm which partitions an inside of the inspection object receiving container body into a pressurization chamber and a receiving chamber of the electronic circuit substrate, for an inspection object; a depressurization unit for bringing the polymer membrane into close contact with an inspection object by depressurizing the measurement environment space; and an ultrasonic probe for transmitting and receiving an ultrasonic wave to and from an inspection object via the ultrasonic transmission medium and the polymer membrane.