OB module: ad-hoc meeting

Monday 12 May 2025, 14:00 → 15:30 Europe/London

Marcello Borri (staff@stfc.ac.uk), James Julian Glover (University of Birmingham (UK))

Please see Marcello's email for Zoom link.

1 University of Birmingham

Speakers: Che Sum Tse (University of Birmingham UK), James Julian Glover (University of Birmingham (UK))

25-05-12_FPC_spTAB_JJG_r1.pdf

HeraeusTdsAlsi.pdf

Wire Bonding on FPC - from WP3 meeting Thur 8th May

Birmingham's wire bonding on the LTU Al foils were reported at last week's ePIC SVT WP3 Electrical Interfaces Meeting, please see linked material in this contribution.

• Things are looking promising.

Birmingham has also looked into bonding the next M-FPC.

• Some imperfections with the new jig has slowed things down.
• Work is ongoing.

2 Brunel University

Speaker: Liliana Teodorescu (Brunel University London)

Comments/concerns from CERN on the stickiness of the gelpacks to transport the Si dummy LAS. 

CERN preferred solution (ref. 1532):

https://swiss-boxes.com/wp-content/uploads/2022/08/Catalogue-Swiss-Boxes.pdf

 

3 Daresbury Laboratory

Speakers: Marcello Borri (staff@stfc.ac.uk), Matthew Buckland (staff@stfc.ac.uk), Ken Davies (UKRI STFC Daresbury)

Status of Ch4 "Detector Module" for pre-TDR. Draft presented to ASIC designers, it contains a list of electrical tests to be perfomed during production.

Next, to complete the part of this chapter related to module options and module assembly strategy. Original deadline: end of May/early June.

 

Status of desing of jigs and tools: 

4 University of Liverpool

Speaker: Jian Liu (University of Liverpool)

Jian

• Dummy silicon wafer
  • Reconnect with Nanosystems JP in July or August 
  • The pricing is expected to remain largely the same 
  • Approximately 2.5 months for delivery
• Wirebonding
  • Another test ongoing for the parameter matrix scan (using acetone before bonding)
  • "Soft wire" to be ordered
• spTAB
  • No news
  • Jian will be in Liverpool during the week from May 19th

 

5 Other remarks

Status of Si dummies ordered by Oxford: 

• Si dummies have been removed from the film backing and boxed.
  • Some samples were placed in the GelPaks ordered (however, Massimo's group found these very sticky and worried the thin Si would be hard to remove). We will receive some sample to try this out.
  • The rest of the samples were placed into membrane boxes that Massimo's group are more familiar with (and recommend).
• Arrangements are being made with Massimo to send these back from CERN (to Birmingham).
• No ETA yet.