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Measurement of the thickness of an insensitive surface layer of a PIN photodiode

Y. Akimoto·Y. Inoue·M. Minowa
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Abstract

We measured the thickness of an insensitive surface layer of a PIN photodiode, Hamamatsu S3590-06, used in the Tokyo Axion Helioscope. We made alpha-particles impinge on the PIN photodiode in various incidence angles and measured the pulse height to estimate the thickness of the insensitive surface layer. This measurement showed its thickness was $0.31 \pm 0.02 μm$ on the assumption that the insensitive layer consisted of Si. We calculated the peak detection efficiency for low energy x-rays in consideration of the insensitive layer and escape of x-rays and Auger electrons. This result showed the efficiency for 4-10keV x-rays was more than 95%.

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Y. Akimoto, Y. Inoue, M. Minowa. 2005-08-23. Measurement of the thickness of an insensitive surface layer of a PIN photodiode. https://doi.org/10.1016/j.nima.2005.11.158

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