O'Grady, Paul Christopher
Tue 3/19/2024 8:46 AM
Good to know … thanks for the clarification, Chris. chris
Kenney, Christopher J. <kenney@slac.stanford.edu>
O'Grady, Paul Christopher
Alnajjar, Dawood;
​Doering, Dionisio;
​Claus, Ric;
​Dubrovin, Mikhail
​
Hi Chris,
Your assumption has always been correct - until now.
For ePixM each detector is composed of four mechanically separate chip pairs. 
These ASIC-"sensor" pairs are significantly more complex and hence risky and may have lower yield. These
"sensors" are also limited in size to one lithographic reticle field. 
Sorry.  But ePixM will need metrology. 
Thanks,
Chris
O'Grady, Paul Christopher <cpo@slac.stanford.edu>
​
Kenney, Christopher J.
​Alnajjar, Dawood;
​Doering, Dionisio;
​Klaus, Ric;
​Dubrovin, Mikhail
​
Hi Chris,
Just to check: I had the impression these units of 4 asics (whether in a square or in a line) should be one solid piece of silicon which shouldn’t need metrology.  Do I misunderstand?
chris

Kenney, Christopher J. <kenney@slac.stanford.edu>
​Alnajjar, Dawood;
​O'Grady, Paul Christopher;
​Doering, Dionisio
​Claus, Ric;
​Dubrovin, Mikhail
​
HI Mikhail,
I've performed a metrology on a module and will provide you with the file this week.
Thanks,

Chris
Alnajjar, Dawood <dnajjar@slac.stanford.edu>
​O'Grady, Paul Christopher;
​Kenney, Christopher J.;
​Doering, Dionisio
​Claus, Ric;
​Dubrovin, Mikhail
​
Hi Mikhail & Chris,
Thanks for reaching out. The Pixel size is 50um x 50um, and we assume no large pixels at this point. Also there are no gaps between pixels. 
@Kenney, Christopher J. would you know if there are gap between the ASICs?
Thanks,
Dawood

Alnajjar, Dawood <dnajjar@slac.stanford.edu>
​O'Grady, Paul Christopher <cpo@slac.stanford.edu>;
​Kenney, Christopher J.;
​Doering, Dionisio
​Claus, Ric;
Dubrovin, Mikhail
​
Hi Mikhail & Chris,
The Pixel size is 50um x 50um, and we assume no large pixels at this point. Also there are no gaps between pixels. 
@Kenney, Christopher J. would you know the gap between the ASICs?
Thanks,
Dawood

2024-03-18 11:18am
O'Grady, Paul Christopher <cpo@slac.stanford.edu>
​Kenney, Christopher J.;
​Doering, Dionisio;
​Alnajjar, Dawood
Claus, Ric;
​Dubrovin, Mikhail
​
Chris K., Dionisio, Dawood,
Could you send Mikhail the geometry for the 4 asic epixm panel?  He needs to know pixel sizes (including things like “large pixels”) and any gaps between pixels/asics.
Thanks!
chris