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EC Cu-LMTs -Status Report-

EC Cu-LMTs -Status Report-. Ulrich Parzefall Universität Freiburg. Intro: LMT Production Process. Elgoline Processing Etching Cutting to length Lamination. Running On schedule. Taiwan (CSIST) Solder PPF0 & PPF1 Thermal cycling QA. 2 weeks per batch. Running 1month late

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EC Cu-LMTs -Status Report-

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  1. EC Cu-LMTs -Status Report- Ulrich Parzefall Universität Freiburg

  2. Intro: LMT Production Process Elgoline Processing Etching Cutting to length Lamination Running On schedule Taiwan (CSIST) Solder PPF0 & PPF1 Thermal cycling QA 2 weeks per batch Running 1month late Accelerating QA sites Assemble LMTs to harnesses El & length QA QA sites Assemble LMTs to harnesses El & length QA Macro- assembly Macro- assembly Running Ready to go Installing LMTs 2 days 2 weeks per batch 2 weeks per batch 2 weeks per batch 1 week 1 week Ulrich Parzefall

  3. Tape Production Status • Production at Elgoline: • Running smoothly – D3 tapes shipped 19 Sept. • Deliveries on time and with LMT amounts as planned • Sufficient raw materials available • Some lamination problems, but can be overcome by manual rework • Yield > 90% • Espanex stocks (etc) sufficient for whole production • D2 in production • Elgoline may not be able to stick to schedule for last batch • D2 & D1 is very large batch – 70% more tapes • Shipment will be split into two • No impact on macro-assembly schedules expected Ulrich Parzefall

  4. Academia Sinica: CSIST • Start of LMT-assembly difficult • Soldering technique modified from Al-LMTs, prototyping necessary • D9 took longer than expected, and was soldered by engineer • D8 & D7 done • knowledge transfer (engineer -> operator) lead to reduced yield (cold solder joints), and delays • Assembly of LMTs not “per disk” but from mixed disks • D6 & D5 • Production speed & yield increased • Recent problems • PPF0 soldering on reflow station – fast but leads to delamination on ~5% of LMTs • Rate capacity of 1 disk/week announced. This has worked well over last 2 weeks and would recover schedule. • Parts • Recovery yield of PPF1.X much lower than initially expected • About 50 PPF1.3 & 200 PPF1.2 made & tested in Freiburg, mostly shipped • Further 100 PPF1.2 & 200 PPF1.3 ordered Ulrich Parzefall

  5. QA Results • QA running smoothly • D9 through QA, with small problems • Glasgow: • 1 open (repaired) • 2 delaminations fixed with Araldite • Freiburg: • 1 open (repaired) • 1 short (rejected) • D8 in QA, minor problems • Glasgow: OK • Freiburg: • 1 with too high resistance (trace has 6k Ω, rejected) • D7 – 50% tested OK in Glasgow Ulrich Parzefall

  6. News • Jens Meinhardt left Freiburg University. He was developing backup soldering options, set up the QA in Freiburg, and drove PPF1.x production. Simon Eckert, Dieter Joos and U.P. will try to replace him. • Freiburg LMT QA is done at NIKHEF. This minimises shipping risks & time, and reception tests. Freiburg staff commute to NIKHEF synchronised to LMT shipments. Ulrich Parzefall

  7. Conclusions & Outlook • LMTs availability remains critical, but improving • Increased delivery rate from Taiwan • Focus is still on LMT output CSIST • Soldering backup in Freiburg: • In-house soldering possible but time-consuming and difficult. Rework of shorts would be needed. • Preferred option is a process with industrial partner, using mini-pcbs between LMT and PPF. Protoypes have been soldered successfully. This is only a backup option. Ulrich Parzefall

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