TY - JOUR
T1 - Characterization of multilayered structures by piezoelectric photoacoustic imaging
AU - Nabeta, Hiroyuki
AU - Yamanaka, Kazushi
AU - Nagata, Yoshihiko
AU - Koda, Toshio
AU - Kanemitsu, Yoshihiko
AU - Masumoto, Yasuaki
PY - 1991/1
Y1 - 1991/1
N2 - The piezoelectric photoacoustic spectroscopy of multilayered structures was studied both theoretically and experimentally. We calculated the one-dimensional temperature moment caused by light absorption and heat diffusion. It was found that the temperature moment is able to explain the basic feature of the photoacoustic (PA) signal of bonded Cu plates including an air gap detected by a PZT transducer attached to the back surface of the plate. The phase of the PA signal at low frequencies is very sensitive to the thickness of the air gap between two Cu plates.
AB - The piezoelectric photoacoustic spectroscopy of multilayered structures was studied both theoretically and experimentally. We calculated the one-dimensional temperature moment caused by light absorption and heat diffusion. It was found that the temperature moment is able to explain the basic feature of the photoacoustic (PA) signal of bonded Cu plates including an air gap detected by a PZT transducer attached to the back surface of the plate. The phase of the PA signal at low frequencies is very sensitive to the thickness of the air gap between two Cu plates.
KW - Multilayered structures
KW - Nondestructive evaluation
KW - Photoacoustic microscopy
KW - Piezoelectric transducer
KW - Temperature moment
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U2 - 10.7567/JJAPS.30S1.289
DO - 10.7567/JJAPS.30S1.289
M3 - Article
AN - SCOPUS:84893991180
SN - 0021-4922
VL - 30
SP - 289
EP - 291
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
ER -