Visit to Heidelberg Loek Ceelie Henk Schuijlenburg

Conclusions HD will test the 2 hole tong US soldering NIKHEF will test the eye-let tong Cut straws shorter keep tolerance to minimum length Tong = 3mm in width (was 2mm) Gastight gluing end-block/straw in small template Orientate middle block in panel template Glue end-blocks to pcb in template first with extra tool No glue between endblocks Bubble glue two layers of end blocks during assembly Avoid glue on soldering pads –Edge of pvc strip shorter –Kapton teflon strip in groove

Observations: Straws just fit tight in template in length Gluing of end block in straw in large template takes more time Capillary effect of glue moves the straws Grouping of end blocks –5 – 10 blocks without clearance + large clearance –Straw moves out the template Vacuum test with NIKHEF pomp showed not enough pressing to hold straws in place Fitting of dowel pins need attention Avoid glue on soldering pads: *Edge of pvc strip shorter Kapton teflon strip in groove to avoid glue dripping in Ultra sonic soldering on both side of tong with 2 holes Soldering contact strips in groups of 8 on pcb