Constantia Teich Gmbh

Research Center for Non Destructive Testing Gmbh

Juergen Roither

Martin Kornfeld

Alfred Wegenberger

Bernhard Reitinger

Clemens Gruensteidl

Saeid Zamiri

For a simple, fast, safe and reliable determination of the layer thickness of a bonding layer between two layers of a packaging, a laser ultrasonic method is provided, in which the transit time of the ultrasonic wave through the first and second packaging layers () is determined in advance, and a maximum (M, M, M) in the measurement signal (S) is sought, and the point in time of occurrence of this maximum (M, M, M) is determined as the total transit time (T, T, T) of the ultrasonic wave, and the transit time of the ultrasonic wave through the first and second packaging layers () is subtracted from the total transit time (T, T, T), and the thickness (d) of the bonding layer is deduced from the known ultrasonic speed (v) in the bonding layer ().

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Grieskirchen, Austria

Juergen Roither