Development of novel low-mass module concepts based on MALTA monolithic pixel sensors. (1st April 2023)

• Record Type: Journal Article
• Authors: Weick, J.; Dachs, F.; Riedler, P.; Vicente Barreto Pinto, M.; Zoubir, A.M.; Flores Sanz de Acedo, L.; Asensi Tortajada, I.; Dao, V.; Dobrijevic, D.; Pernegger, H.; Van Rijnbach, M.; Sharma, A.; Solans Sanchez, C.; de Oliveira, R.; Dannheim, D.; Schmidt, J.V.
• Is Part Of: Journal of instrumentation. Volume 18:Number 4(2023)
• Publication Date: 2023-04-01
• Subjects: Solid state detectors -- Manufacturing -- Overall mechanics design (support structures and materials, vibration analysis etc.); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/18/04/C04003
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: The MALTA CMOS monolithic silicon pixel sensors has been developed in the Tower 180 nm CMOS imaging process. It includes an asynchronous readout scheme and complies with the ATLAS inner tracker requirements for the HL-LHC. Several 4-chip MALTA modules have been built using Al wedge wire bonding to demonstrate the direct transfer of data from chip-to-chip and to read out the data of the entire module via one chip only. Novel technologies such as Anisotropic Conductive Films (ACF) and nanowires have been investigated to build a compact module. A lightweight flex with 17 μm trace spacing has been designed, allowing compact packaging with a direct attachment of the chip connection pads to the flex using these interconnection technologies. This contribution shows the current state of our work towards a flexible, low material, dense and reliable packaging and modularization of pixel detectors.