Processing of AC-coupled n-in-p pixel detectors on MCz silicon using atomic layer deposited aluminium oxide

Jennifer Ott*, A. Gädda, S. Bharthuar, E. Brücken, M. Golovleva, J. Härkönen, M. Kalliokoski, A. Karadzhinova-Ferrer, S. Kirschenmann, V. Litichevskyi, P. Luukka, L. Martikainen, T. Naaranoja

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

2 Sitaatiot (Scopus)

Abstrakti

We report on the fabrication of capacitively (AC) coupled n+-in-p pixel detectors on magnetic Czochralski silicon substrates. In our devices, we employ a layer of aluminium oxide (Al2O3) grown by atomic layer deposition (ALD) as dielectric and field insulator, instead of the commonly used silicon dioxide (SiO2). As shown in earlier research, Al2O3 thin films exhibit high negative oxide charge, and can thus serve as a substitute for p-stop/p-spray insulation implants between pixels. In addition, they provide far higher capacitance densities than SiO2 due to their high dielectric constant, permitting more efficient capacitive coupling of pixels. Furthermore, metallic titanium nitride (TiN) bias resistors are presented as an alternative to punch-through or poly-Si resistors. Devices obtained by the above mentioned process are characterized by capacitance–voltage and current–voltage measurements, and by 2 MeV proton microprobe. Results show the expected high negative charge of the Al2O3 dielectric, uniform charge collection efficiency over large areas of pixels, and acceptable leakage current densities.

AlkuperäiskieliEnglanti
Artikkeli162547
JulkaisuNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
DOI - pysyväislinkit
TilaSähköinen julkaisu (e-pub) ennen painettua julkistusta - 1 tammikuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Sormenjälki Sukella tutkimusaiheisiin 'Processing of AC-coupled n-in-p pixel detectors on MCz silicon using atomic layer deposited aluminium oxide'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.

  • Laitteet

    OtaNano

    Anna Rissanen (Manager)

    Aalto-yliopisto

    Laitteistot/tilat: Facility

  • Palkinnot

    Young Scientist poster prize

    Jennifer Ott (Recipient), 22 helmikuuta 2019

    Palkinto: Palkinto tai huomionosoitus tuotoksesta

    Siteeraa tätä