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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ott, Jennifer
Helsinki Institute of Physics
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (22/22 displayed)
- 2023Quantifying the Impact of Al Deposition Method on Underlying Al2O3/Si Interface Qualitycitations
- 2022Characterization of Heavily Irradiated Dielectrics for Pixel Sensors Coupling Insulator Applicationscitations
- 2022Characterization of Heavily Irradiated Dielectrics for Pixel Sensors Coupling Insulator Applicationscitations
- 2022Multispectral photon-counting for medical imaging and beam characterization - A project reviewcitations
- 2022Multispectral photon-counting for medical imaging and beam characterization — A project reviewcitations
- 2022(oral talk) Compatibility of Al-neal in processing of Si devices with Al2O3 layer
- 2022Impact of doping and silicon substrate resistivity on the blistering of atomic-layer-deposited aluminium oxidecitations
- 2021Application of atomic layer deposited thin films to silicon detectors ; Atomikerroskasvatuksella tuotettujen ohutkalvojen soveltaminen puolijohdeilmaisimiincitations
- 2021AC-coupled n-in-p pixel detectors on MCz silicon with atomic layer deposition (ALD) grown thin filmcitations
- 2021AC-coupled n-in-p pixel detectors on MCz silicon with atomic layer deposition (ALD) grown thin filmcitations
- 2021Al-neal Degrades Al2O3 Passivation of Silicon Surfacecitations
- 2021Cadmium Telluride X-ray pad detectors with different passivation dielectricscitations
- 2021Processing and Interconnections of Finely Segmented Semiconductor Pixel Detectors for Applications in Particle Physics and Photon Detectioncitations
- 2020Processing of AC-coupled n-in-p pixel detectors on MCz silicon using atomic layer deposited aluminium oxidecitations
- 2020Processing of AC-coupled n-in-p pixel detectors on MCz silicon using atomic layer deposited aluminium oxidecitations
- 2020Passivation of Detector-Grade Float Zone Silicon with Atomic Layer Deposited Aluminum Oxidecitations
- 2020Impact of doping and silicon substrate resistivity on the blistering of atomic-layer-deposited aluminium oxidecitations
- 2019Effects of Defects to the Performance of CdTe Pad Detectors in IBIC Measurementscitations
- 2019Cadmium Telluride X-ray pad detectors with different passivation dielectricscitations
- 2019Passivation of Detector‐Grade FZ‐Si with ALD‐Grown Aluminium Oxidecitations
- 2017Advanced processing of CdTe pixel radiation detectorscitations
- 2016Atomic Layer Deposition (ALD) grown thin films for ultra-fine pitch pixel detectorscitations
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article
Advanced processing of CdTe pixel radiation detectors
Abstract
We report a fabrication process of pixel detectors made of bulk cadmium telluride (CdTe) crystals. Prior to processing, the quality and defect density in CdTe material was characterized by infrared (IR) spectroscopy. The semiconductor detector and Flip-Chip (FC) interconnection processing was carried out in the clean room premises of Micronova Nanofabrication Centre in Espoo, Finland. The chip scale processes consist of the aluminum oxide (Al2O3) low temperature thermal Atomic Layer Deposition (ALD), titanium tungsten (TiW) metal sputtering depositions and an electroless Nickel growth. CdTe crystals with the size of 10 × 10 × 0.5 mm3 were patterned with several photo-lithography techniques. In this study, gold (Au) was chosen as the material for the wettable Under Bump Metalization (UBM) pads. Indium (In) based solder bumps were grown on PSI46dig read out chips (ROC) having 4160 pixels within an area of 1 cm2. CdTe sensor and ROC were hybridized using a low temperature flip-chip (FC) interconnection technique. The In-Au cold weld bonding connections were successfully connecting both elements. After the processing the detector packages were wire bonded into associated read out electronics. The pixel detectors were tested at the premises of Finnish Radiation Safety Authority (STUK). During the measurement campaign, the modules were tested by exposure to a 137Cs source of 1.5TBq for 8minutes. We detected at the room temperature a photopeak at 662 keV with about 2 % energy resolution.