65 nm meeting
Bat 20 - uElec
https://cern.zoom.us/j/69600555186?pwd=eVcxUTBnc2J0bWwyQ3RBM0ttZkN6Zz09
* MOSS design, Xiaochao, Fred
- situation with additional metal:
o design kit being prepared/installed at CERN (6 metals)
o metal 4 is changed (the addition of new metals is not the only change)
o PDK will be shared over cliosoft/SOS (in discussion with Pedro)
=> require list of CERN-login of design to access the PDK
o probably will delay a bit the submission
o exercise of mock-submission -> rather January than December ?
- for our block: PE
o CERN required some modifs (buffers)
o some additional verifications
o not impacted by new PDK for additional metals
- Sur le manpower pour les activités futures de design
o LPSC: Fatah Rarbi pourrait contribuer à partir de l'an prochain, sujets: ADC (?)
o IP2I: le retour en 2022...
==> nécessité de discuter en amont avec Gianluca puis revenir auprès des groupes Français
* CE65++ design, Andrei
- pad-ring with 3 power domains in the working, to be crosschecked with CERN
- discussion on various options identified 2 weeks ago
o Auguste: why not re-introducing 15 um with digital output?
* reminder that it is not possible to include PE-microcircuit in 15 um (explain MOSS-choice of 18 um)
* the analogue version has 15 um can be used to study the resolution
* Remark by Andrei: another amplification design, more compact, is required to allow for
* note that the exclusion-zone around the diode is 5x5 um2
- timeline & personpower
o at least 1 final chip to be ready by end of 2021
o then all the other variants (~8 circuits) to be ready within first months of 2022
o Szymon can help if instructed on what to do
- impact of new PDK?
o since matrix not yet existing... difficult to say
* MOST design, Szymon
- target to finish before Christmas
- Szymon's part should be send by mid-December
- about new metal stack -> not yet there according to Szymon: is that contradicting Fred's news...not clear
=> final choice depends on whether designers can meet the deadline or not
* Tests of CE65, Szymon, Serhiy
- current conclusion
o node capacitance seems to be small ~2-3 fF
o other still unknown issues (frequency, noise, negative charge of pixels...)
- Why don't we see the 6.5 keV peak from 55Fe?
o seems not compatible with pixel noise
o suggest to build calibration pixel per pixel
- About cluster size, currently 3x3
o suggest to go 5x5 and compare results
- About negative values of neighbour pixels
o due to slow signal restoration
o need to do something about that
- About the clock read-out
o no understanding at all about this effect (not expected at all!)
o Andrei suggests to increase current
- B1 not seeing anything => probably due to doping
- For C and D sensors, we need fixed PCBs
- Test Beam DESY
o Serhiy leaves on Saturday => sensors should be ready by Friday
o 2 DAQboards will be
o Sensor list: A1, A4, B4, plus hopefully D4 if ready
o irradiated sensors at 100 and 500 Mrad... not for beamtest
- Corryvreckan, Yitao
o working on monitoring
o will be able to say online whether ref tracks are correlated with CE65
o require noise runs in order to input noise map to the analysis
- fallback solution is to use noise maps from lab test
===> Next meeting on Thursday December 9th, at 11 AM (due to WP1.2 https://indico.cern.ch/event/1094135/)