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- Load RD53a Quad modules (drawings: 150um, 400um) with connectors oriented as shown in picture above
- Load modules onto 19-1 OB Stave (no assembly drawing yet)
- Load without collisions: 200 um 200um nominal gap / 100 micron minimum gap between modules (no assembly drawing yet)
- ESD protection during loading: grounding of tooling
- Mechanical protection of wire bonds during loading: stay clear of wire bonds, handle modules using tooling only, consider covers/shields
- Baseplate to be installed onto glue robot: weight limit 7kg (per manual)
- Stave to be removed from baseplate and transferred to test box for QC testing
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- Load Triplet modules (drawing, .step)
- Load onto 19-1 IB Stave (no drawing yet, preliminary CAD on LBL Windchill site)
- Load without collisions: 200um nominal gap / 100 micron minimum gap between modules (no assembly drawing yet)
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- Closely toleranced pins/bushings – same approach as used for 19-0 tooling
- Requirement: +/-75um module position tolerance in local support coordinate system (per requirements document "ITk Pixel Module Loading Accuracy Requirements" AT2-IP-ES-006-v3)
- Distribute tolerances:
- +/-50um module position relative to loading tooling (to avoid collisions with 100um gap between modules)
- +/-25um local support position relative to loading tooling (to accurately place modules to meet +/-75um requirement)
Notes for design of 19-1 Stave tooling:
- Re-use tooling from 19-1 Quad loading bridge; make new 19-1 linear Triplet loading bridge and tooling
- Using beads to set glue thickness; no longer need dial indicators or differential adjusters
- Use 2 sets of micrometer adjusters (absolute scale)
- Add soft material to vacuum pads for better sealing and smoothness.
- Consider adding a hole patterns for trussing / support below the 19-1 Stave baseplate.
- Reconfirm that Stave and Module CADs / drawings are compatible with tooling, before manufacture.
- Use dowel pins and screw interface to ends of Stave (locate same as in production assembly)
- Consider longer dowel pins in the baseplate (help locate the bridge, without pivoting)
Some past presentations:
- 30 March 2021: Tooling and Plans for Loading, 19-0/1, Stave and Ring