From gilg@lbl.gov Tue Feb 4 12:01:41 2003 Date: Mon, 3 Feb 2003 20:37:46 -0800 (PST) From: Murdock Gilchriese To: SCT hybrid/module at LBL , Alessandra Ciocio , Steve Dardin , Vitaliy Fadeyev , Murdock Gilchriese , Fred Goozen , Carl Haber , jasnow@lbl.gov, Jeremey Lys , Frank McCormack , rapowers@lbl.gov, Rhonda Witharm Cc: bill@scipp.ucsc.edu, Felix Rosenbaum , Alex Grillo , Mark Anderson , Abe Seiden Subject: Minutes of SCT meeting February 3, 2003 There has been a misunderstanding about what hybrids started means in the last two weeks. It means hybrids with chips started to load. This has been corrected this week Hybrids started as of end last week 71 In last week 12 Hybrids up to fanout bonds 40 In last week 0 Modules started as of end last week 22 In last week 4 Modules test complete 7 In last week 4 The summary files are at http://www-physics.lbl.gov/~gilg/SCTWeeklyMeetings/Feb32003/ For some reason, one of these is currently protected, so I have attached it(hybrids and modules vs time). I encourage you to look particularly at the final summary, which attempts to summarize the current status of all modules. I have also added an IV summary. Hybrids We decided to ship to UCSC ASAP existing fixtures at LBL to complete all needed at UCSC. This will bring LBL to a halt on chip mounting, but will force LBL to complete the necessary fixtures to continue. LBL will continue to do all fanout bonding. Thus UCSC will mount chips, do the chip bonds, test and burnin. THe first some hybrids will be sent to LBL for testing to compare with UCSC results. The goals is to get some real hybrids made at UCSC before the SCT week in March. We received today 32 more hybrids from Japan. They are good. Rhonda will split and ready them to sent to UCSC along with hybrids needing chip replacement(Sandra to choose). Module Assembly Fixtures A0, A1 and A2 are now in use but not yet clear if results are repeatable. Results from P019-P022 looked at and some adjustments necessary for next modules. P023 and maybe P024 to be started today. Note that I have include histogram of midyf in the folder referenced above. We are current within +/-8 microns except for P001 in which gross error was made. THere are many other dimensional specs. If you look at the FinalSummary files you will note that we are often just over on some of the Z specs, in addition to midyf relative to current spec.We are sometimes also over tolerances on stereo angle and related. Need to understand how to handle this. Module Testing Sandra found there are "flaky" problems with some channels in Cracow HV modules, which may explain some of the problems with tripping modules. Not yet clear how this will be resolved, but will slow down testing. Modules with "good" hybrid, P016 has 6 bad channels. 5 of these are from bonding problems. Realized this is not systematically documented on travellers but must be. Rhonda to follow up. Inventory We realized too late that we will run out of detectors in the next few days. More detectors will be shipped from Japan "early this week". To attempt to avoid this in future, will include inventory each Monday as part of these minutes. Frank is responsible for detectors and baseboards, Rhonda for hybrids and Sandra for chips. Housekeeping There are many, many improvements to implement in the general area of housekeeping and organization. Among the most important are 1) vacuum dry lockers. I found that there is a powder residue apparently left over from cleaning the trays in the locker. This has to be vacuumed out(using HEPA filter vacs). I did this on the module locker but all of the lockers need to be done. I will organize this. This may be some/all of the white specs seen on lots of modules. 2) reconfigure central tables we need more space in the central tables, need to move computer and monitor and so forth as soon as possible. Carl, Frank and me to organize 3) stations and tools It's driving me nuts(OK nuttier) to have to search for tools each time an operation is needed. We need bins(Steve to get) and organized stations for each step. I will follow up on this with also Frank. 4) cleaning and related I cleaned off the top of the IV box(very dusty) and where the old dry box sat(ditto). We need to implement a regular and reasonable cleaning procedure each day(trash cans for example) and each week(floor, rotating surfaces). I will attempt to do this with Steve but this will require help from everyone. [ Part 2, "" Application/OCTET-STREAM (Name: ] [ "HybridsModulesperWeekFeb032003.xls") 33KB. ] [ Unable to print this part. ]