LAYERED-BODY DETACHMENT-TESTING METHOD AND DETACHMENT-TESTING DEVICE

摘要

Provided are a layered-body detachment-testing method and detachment-testing device which are capable of easily and clearly detecting interlayer detachment of a layered body. Multiple-reflected waves are received in advance in both a defect-free section and a simulated-detachment section of a layered body, and a number of reflections is obtained of reflected waves in which the difference between the echo height of the multiple-reflected wave in the defect-free section and the echo height of the multiple-reflected wave in the simulated-detachment section is at or above a prescribed level. The presence/absence of interlayer detachment is tested by receiving a multiple-reflected wave in a test site (E) of a layered body (10), and comparing the echo height of reflected waves for the number of reflections in the test site (E) to the echo height of reflected waves for the number of reflections in the defect-free section.