Patent ID: 9588041
Date: 2017-03-07
CPC Classifications: G01N

Claim:
1. A non-destructive method for determining a material property at an interface between a first layer and a second layer of a sample, the method comprising: outputting electromagnetic radiation to the sample; receiving electromagnetic radiation that was reflected by or transmitted through the sample, wherein the electromagnetic radiation received by the sample is non-destructive to the sample; digitizing the electromagnetic radiation reflected by or transmitted though the sample to yield waveform data, wherein the waveform data represents the electromagnetic radiation reflected by or transmitted though the sample, the waveform data having a first magnitude, a second magnitude and a third magnitude, wherein each magnitude is a peak or trough; wherein the first magnitude represents a reflected or transmitted portion of the electromagnetic radiation provided to a top surface interface of the first layer, the second magnitude represents a reflected or transmitted portion of the electromagnetic radiation provided to the interface between the first and second layers, and the third magnitude represents a reflected or transmitted portion of the electromagnetic radiation provided to a bottom surface interface of the second layer; and determining the material property between the first layer and the second layer of the sample by analyzing the second magnitude and/or the third magnitude; wherein the material property is adhesive strength; and determining the adhesive strength between the first layer and the second layer of the sample by analyzing the waveform data to determine if a fourth magnitude is located between the third magnitude and the second magnitude in time.