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Steve Snow UK-V meeting RAL. 30/01/02. Module programme. Two middle modules, K5-300 and K5-301 built last year. Both have Cicorel hybrids, ITEP spines, Optimask fan-ins, production series Hamamatsu detectors. No shunt shield on detector part of K5-300.
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Steve Snow UK-V meeting RAL. 30/01/02 Module programme • Two middle modules, K5-300 and K5-301 built last year. • Both have Cicorel hybrids, ITEP spines, Optimask fan-ins, production series Hamamatsu detectors. • No shunt shield on detector part of K5-300. • Both work well in test box environment. • Two outer modules, K5-302 and K5-303 assembled last week, wire-bonding now. • Both have ITEP spines, Optimask fan-ins, pre-series Hamamatsu detectors. • K5-302 has Cicorel hybrid, K5-303 has Dyconex hybrid fixed with micro-surgery ( HV short cut away and HV connection re-made with wire bonds in layer 5 ) • Good (<5 Ohm) connection from hybrid to spine via tabs (was a problem last year). • Accidental (few hundred Ohm) connection from TPG to backplane. Windows in parylene not sealed by araldite. Not serious 1/f.C ~ 50 Ohm at 40 MHz. • Next steps. • See whether Dyconex works as well as Cicorel in test box. • See whether they work on system test sector.
Parts for more modules • Detectors. Enough pre-series W31 and W32 for a few more modules in UK. Plenty of production series of all types. • Spines. Two middle spines at MPI. A few inner spines at NIKHEF. One outer in the post to Manchester and another in the post to Valencia. • Fan-ins. Enough Optimask outer fan-ins for ~8 modules at Freiburg. CNM fan-ins (middle and outer) promised for January. Valencia already has a few. • Hybrids. One Cicorel and one mended Dyconex hybrid ready for chips. One more Dyconex which can probably be mended. Ten good Cicorel flexes. Six pristine CC substrates. Three CC substrates rescued from broken Dyconex hybrids. Re-submission by Dyconex with two versions of the wrap around due to start this week. • Washers. Plenty of washers in Stesalite. • Assembly Jigs. Manchester has one “final version” outer jig (can be converted to middle). Valencia has one outer jig. MPI has one middle jig expected to be ready in 2 weeks. NIKHEF has one inner jig. Plan: Make two more outers, then probably a middle and/or inner in time for SCT week. Continue to build up numbers for system test and irradiation.
Assembly and metrology status • Experience with assembly of eight middle modules, K4 and K5, during 2001 shows; • We can meet the z ( module flatness and thickness ) specification reliably. • Placement of the four detectors relative to each other is reliably within spec. apart from the most difficult parameter, midyf. For this parameter we have an r.m.s. of 3.1 microns and a specification of ±5 microns, implying that we can expect 10 % outside. In fact 2 out of 8 were outside. We suspect the spread on midyf is due to transfer plate temperature differences between alignment and glue curing – if so we can fix it. • Placement of the four detectors relative to the hole and slot ought to be easy but we have not proved it ( some modules not measured, some assembled in a non-optimal way). • The alignment specifications should be taken as an ideal not as a hard limit. In production, if a module is outside specs by a factor of 2 then perhaps we should reject it.
Next steps, when K5 is approved. Assemble a series of dummy modules with a high success rate for meeting alignment specs ( barrel chose 4 out of 5, difficult! ). Assemble a series of real modules with a high success rate for meeting the electrical specs. Prepare tooling for mass production. Currently have at most one jig set at each assembly site – will need several. Estimate 4 middle/outer sets and 2 inner sets in UK. Electromec quote.
