Analyzing glue dispensing performance
Coverage | Glue layer thickness | |
|---|---|---|
| Purpose | Determine the area of the glue layer beneath a module as a percentage of the module area | Determine the thickness of the layer of glue underneath the module |
| Target range | 75-85% | 75-125 microns (ATLAS specification: 100+100 -50 microns) |
| Measurement strategy | Extract glue layer area from images collected of samples on a clean, solid, high-contrast background. Please note that a ruler or other clearly known dimension must be in the image frame to provide a pixel-real world coordinates calibration source. | Height gauge measurements |
| Analysis resources | Charlie created a MATLAB script for measuring coverage in images of dispensed samples collected on a clean white background. Alternatively, we can extract these areas with image processing tools like ImageJ. | Hannah and Rachel prepared Python-based scripts to analyze csv files containing height gauge measurement results. Jupyter Notebooks to run analysis directly from the gSheets are available here: https://gitlab.cern.ch/hherde/slac-itk-pixels-gsheet-analysis They started out as these (messy) scripts are available on GitLab: |