Development of n-in-p silicon planar pixel sensors and flip-chip modules for very high radiation environments

Y. Unno, Y. Ikegami, S. Terada, S. Mitsui, O. Jinnouchi, S. Kamada, K. Yamamura, A. Ishida, M. Ishihara, T. Inuzuka, K. Hanagaki, K. Hara, T. Kondo, N. Kimura, I. Nakano, K. Nagai, R. Takashima, J. Tojo, Kohei Yorita

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    In this paper we present R&D of n-in-p pixel sensors, aiming for a very high radiation environment up to a fluence of 1016 n eq/cm2. To fabricate these sensors, two batches with different mask sets were employed: the first resulted in pixel sensors compatible with the ATLAS pixel readout frontend chip called FE-I3, and the second in FE-I3 and a new frontend chip, FE-I4, compatible sensors; small diodes were employed to investigate the width from the active diode to the dicing edge and the guard rings. Tests involving the diodes showed that the strong increase of leakage current was attributed to the edge current when the lateral depletion zone reaches the dicing edge and the lateral depletion along the silicon surface was correlated with the 'field' width. The onset was observed at a voltage of 1000 V when the width was equal to ∼400 μm. The pixel sensors that were diced at a width of 450 μm could successfully maintain a bias voltage of 1000 V. Hybrid flip-chip pixel modules with dummy and real chips were also fabricated. Lead (PbSn) solder bump bonding proved to be successful. However, lead-free (SnAg) solder bump bonding requires further optimization.

    Original languageEnglish
    Pages (from-to)129-135
    Number of pages7
    JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
    Volume650
    Issue number1
    DOIs
    Publication statusPublished - 2011 Sep 11

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    modules
    Pixels
    pixels
    chips
    Radiation
    Silicon
    sensors
    Sensors
    silicon
    radiation
    Diodes
    diodes
    solders
    depletion
    dummies
    electric potential
    Bias voltage
    Leakage currents
    Soldering alloys
    readout

    Keywords

    • Bump bonding
    • n-in-p
    • p-type
    • Pixel
    • Radiation tolerant
    • Sensor
    • Silicon

    ASJC Scopus subject areas

    • Instrumentation
    • Nuclear and High Energy Physics

    Cite this

    Development of n-in-p silicon planar pixel sensors and flip-chip modules for very high radiation environments. / Unno, Y.; Ikegami, Y.; Terada, S.; Mitsui, S.; Jinnouchi, O.; Kamada, S.; Yamamura, K.; Ishida, A.; Ishihara, M.; Inuzuka, T.; Hanagaki, K.; Hara, K.; Kondo, T.; Kimura, N.; Nakano, I.; Nagai, K.; Takashima, R.; Tojo, J.; Yorita, Kohei.

    In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 650, No. 1, 11.09.2011, p. 129-135.

    Research output: Contribution to journalArticle

    Unno, Y, Ikegami, Y, Terada, S, Mitsui, S, Jinnouchi, O, Kamada, S, Yamamura, K, Ishida, A, Ishihara, M, Inuzuka, T, Hanagaki, K, Hara, K, Kondo, T, Kimura, N, Nakano, I, Nagai, K, Takashima, R, Tojo, J & Yorita, K 2011, 'Development of n-in-p silicon planar pixel sensors and flip-chip modules for very high radiation environments', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 650, no. 1, pp. 129-135. https://doi.org/10.1016/j.nima.2010.12.191
    Unno, Y. ; Ikegami, Y. ; Terada, S. ; Mitsui, S. ; Jinnouchi, O. ; Kamada, S. ; Yamamura, K. ; Ishida, A. ; Ishihara, M. ; Inuzuka, T. ; Hanagaki, K. ; Hara, K. ; Kondo, T. ; Kimura, N. ; Nakano, I. ; Nagai, K. ; Takashima, R. ; Tojo, J. ; Yorita, Kohei. / Development of n-in-p silicon planar pixel sensors and flip-chip modules for very high radiation environments. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2011 ; Vol. 650, No. 1. pp. 129-135.
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    AU - Hara, K.

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    AU - Nakano, I.

    AU - Nagai, K.

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