Campaign to identify the future CMS tracker baseline

CMS has started a campaign to identify the future sensor technology baseline for the Tracker Upgrade Phase II. A large variety of 6-in. wafers of different thicknesses and technologies have been ordered. The sensor properties and especially the behavior after irradiation will be investigated for floatzone, magnetic Czochralski and epitaxial silicon material with dedicated test structures.The sensors come in p-in-n and n-in-p versions. The p-stop as well as p-spray isolation technologies will be explored for the n-in-p type sensors. Some additional wafers will come with an additional routing in a second metal layer on selected structures. Approximately one half of these wafers have already been delivered. Pre-qualification has just started.

► Investigate floatzone, magnetic Czochralski and epitaxial silicon in different thicknesses produced by one manufacturer.
► Perform an extensive irradiation campaign with single proton, single neutron and mixed proton + neutron irradiations.
► Test new sensor designs like “Strixel” sensor and sensors with integrated pitch adapters.
► Identify the future sensor technology baseline for the tracker Upgrade Phase II.